K20 Engine Control Module: Scan Tool Information (LEA)
The Engine Control Module Scan Tool Data List contains all engine-related parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.
Use the Engine Scan Tool Data List only after the following is determined:
- The Diagnostic System Check - Vehicle is completed.
- No diagnostic trouble codes (DTCs)
- On-board diagnostics are functioning properly
The scan tool values from a properly running engine may be used for comparison with the engine you are diagnosing. The Engine Scan Tool Data List represents values that would be seen on a normally running engine.
NOTE:
A scan tool that displays faulty data should not be used. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.
Only the parameters listed below are referenced in this service manual for use in diagnosis.
Engine Control Module Scan Tool Data
| Parameter | System State | Expected Value | Description |
|---|---|---|---|
| Base Operating Conditions: Engine Idling/Radiator Hose Hot/Park or Neutral/Closed Loop | |||
| 5 V Reference 1, 2, 3 or 4 Circuit Status | Ignition ON | OK / Malfunction | This parameter will display OK if the circuit is good or Malfunction if a short to ground, short to B+ or open circuit is present. |
| A/C Compressor Operation | A/C ON | Allowed / Not Allowed | This parameter displays if the A/C compressor is allowed or not allowed to operate. |
| A/C Disabled - A/C Pressure Out of Range | A/C ON | Yes / No | This parameter displays whether the A/C pressure is out of range for normal operation as determined by the control module. |
| A/C Disengage History 1-8 | A/C ON | Reason for A/C Disengagement | The parameter displays the reason for the last 8 air conditioning (A/C) compressor disengagements in order from 1 to 8 with 8 being the most recent. There are 8 possible causes for the A/C compressor to disengage. |
| A/C High Side Pressure Sensor | A/C OFF | 0.75-1.5 V* | This parameter displays the voltage signal from the A/C high side pressure sensor input to the control module. *Varies with temperature, humidity, and altitude. |
| A/C ON | 1.3-2.5 V* | ||
| A/C High Side Pressure Sensor | A/C OFF | 450-827 kPa (65-120 psi)* | This parameter displays the pressure from the A/C high side pressure sensor signal circuit to the control module. *Varies with temperature, humidity, and altitude. |
| A/C ON | 827-2,350 kPa (120-341 psi)* | ||
| A/C OFF for WOT | A/C ON | Yes / No | This parameter displays whether the control module is commanding the A/C compressor clutch relay OFF for wide open throttle (WOT). |
| A/C Request Signal | A/C ON | Yes / No | This parameter displays the state of the A/C request input to the control module from the heating, ventilation, and air conditioning (HVAC) controls. |
| Accelerator Pedal Position | Ignition ON | % | This parameter displays the angle of the accelerator pedal position (APP) as calculated by the control module using the signals from the APP sensors. |
| Air/Fuel Equivalence Ratio Command | Engine Idling | :1.0 | This parameter should display 1.0 when in Closed Loop fuel control. |
| Ambient Air Temperature | Ignition ON | °C °F Varies | This parameter displays the outside air temperature as calculated by the control module. |
| APP Sensor 1 | Accelerator pedal not actuated | 0.7-1.2 V | This parameter displays the actual voltage on the accelerator pedal position (APP) sensor 1 signal circuit as measured by the control module. |
| Accelerator pedal fully actuated | 4.2-4.5 V | ||
| APP Sensor 1 Circuit Status | Ignition ON | OK / Malfunction | APP Sensor 1 indicates that the sensed accelerator pedal position 1 sensor value is currently out of range or that a Malfunction has been detected based upon the sensed accelerator pedal position 1 sensor value being out of range |
| APP Sensor 1 Learned Released Position | Ignition ON | 0.98 V | This parameter displays the accelerator pedal sensor 1 signal at its minimum learned position (pedal released) as a voltage. (The minimum learned position is automatically updated periodically as determined by the calibration. |
| APP Sensor 1 Position | Ignition ON | % | This parameter contains the displacement determined from accelerator pedal position sensor 1 (corrected and normalized based upon its learned minimum and maximum positions). |
| APP Sensor 1 and 2 | Ignition ON | Agree / Disagree | This parameter displays Disagree if the control module detects the signal voltage from APP sensor 1 is not in correct relationship to APP sensor 2. The scan tool displays Agree under the normal operating conditions. |
| APP Sensor 2 | Accelerator pedal not actuated | 0.3-0.5 V | This parameter displays the actual voltage on the accelerator pedal position (APP) sensor 2 signal circuit as measured by the control module. |
| Accelerator pedal fully actuated | 2.2-2.5 V | ||
| APP Sensor 2 Circuit Status | Ignition ON | OK / Malfunction | APP Sensor 2 indicates that the sensed accelerator pedal position 2 sensor value is currently out of range or that a malfunction has been detected (and latched) based upon the sensed accelerator pedal position 2 sensor value being out of range. |
| APP Sensor 2 Learned Released Position | Ignition ON | 0.49 V | This parameter indicates the accelerator pedal sensor 2 signal at its minimum learned position (pedal released) as a voltage. (The minimum learned position is automatically updated periodically as determined by the calibration. |
| APP Sensor 2 Position | Ignition ON | % | This parameter contains the displacement determined from accelerator pedal position sensor 2 (corrected and normalized based upon its learned minimum and maximum positions). |
| APP Sensors | Ignition ON | % | This parameter contains the accelerator pedal position resulting directly from the settling of differences of the accelerator pedal position sensors (prior to any compensation to determine driver intent). |
| BARO | Engine Idling | 65-104 kPa (8-16 psi) | This parameter displays the barometric pressure. The control module uses the barometric pressure sensor input for fuel control to compensate for altitude differences. |
| Brake Pedal Position Circuit Signal | Ignition ON | Closed | This parameter displays the serial data message of the brake signal from the electronic brake and traction control module (EBTCM). |
| Brake Pedal Position Sensor Signal | Ignition ON | Applied / Released / Invalid | This parameter displays the serial data message of the brake pedal position sensor signal from the electronic brake and traction control module (EBTCM). |
| Calculated Air Flow | Engine Idling | 3.42-3.52 g/s | This parameter contains the mass airflow determined from the speed density (MAP based) calculation of air mass per cylinder. |
| Calculated Catalyst Temperature | Engine Idling | 495°C (923°F) | This parameter contains the estimated catalyst temperature for bank 1 sensor 1 (as a function of engine speed, engine airflow, and fuel ethanol percentage) for use in the oxygen sensor and catalyst monitor diagnostic software. |
| Calculated Engine Oil Temperature | Engine Idling | 81°C (178°F) | This parameter contains the estimated engine oil temperature (as a function of engine coolant temperature and other parameters). |
| Camshaft Position Sensor | Engine Idling | RPM | This parameter displays the speed of the engine as calculated by the signal from a camshaft position sensor. |
| Catalyst Monitor Complete This Ignition Cycle | Engine Idling | Yes / No | This parameter indicates the status of the catalyst monitor diagnostic. Catalyst Monitor Test Running indicates yes or no when the catalyst monitor diagnostic is actively running a test |
| Catalyst Monitor Enabled This Ignition Cycle | Engine Idling | Yes / No | This parameter indicates the status of the catalyst monitor diagnostic. Catalyst Monitor Test Running indicates yes or no when the catalyst monitor diagnostic is actively running a test |
| Catalyst Monitor Not At Idle Test Conditions Met | Engine Idling | Yes / No | This parameter indicates the status of the catalyst monitor diagnostic. Catalyst Monitor Test Running indicates yes or no when the catalyst monitor diagnostic is actively running a test |
| Catalyst Monitor Test Counter | Engine Idling | Counts | This parameter contains the number of repeated results of the catalyst monitor diagnostic test that have been performed since a code clear (used to determine if a sufficient number of tests have run to report a passing condition). |
| Catalyst Monitor Test Result | Engine Idling | No Decision | This parameter indicates the status of the catalyst monitor diagnostic. Multiple tests may run before the diagnostic reports a "Pass" or "Fail" and will be tracked by Catalyst Monitor Diagnostic Test Counter. When this parameter reports a Pass or Fail, the diagnostic is complete for the current trip and will not attempt any further tests. |
| Catalyst Monitor Test State | Engine Idling | Active / Inactive | This parameter indicates the status of the catalyst monitor diagnostic by displaying active or inactive. This test will only run with the engine at idle. |
| Change Engine Oil Indicator Command | Ignition ON | ON / OFF | This parameter sends a signal through the serial communication to inform the driver to change the engine oil. It is based on a calibrated amount of time. |
| Clutch Pedal Switch (If Equipped) | Clutch pedal not actuated | Released | This parameter displays the state of the clutch pedal as determined by the control module from the clutch pedal switch. |
| Clutch pedal fully actuated | Applied | ||
| Clutch Start Switch (If Equipped) | Clutch pedal not actuated | OFF | This parameter displays the state of the clutch pedal as determined by the control module from the clutch start switch. |
| Clutch pedal fully actuated | ON | ||
| Cold Startup | Ignition ON | Yes / No | This parameter displays whether the engine meets the conditions for a cold startup during the present ignition cycle. The scan tool displays Yes when the conditions for a cold startup are met during the ignition cycle. The scan tool displays No when the conditions for a cold startup are not met during the present ignition cycle. Conditions for a cold startup require the coolant temperature and the intake air temperature to be below a predetermined temperature and within a certain range of each other. These conditions must occur after the engine was warmed up to a specific temperature during the previous ignition cycle. |
| Cooling Fan Relay 1 Command | Ignition ON | ON / OFF | This parameter displays the commanded state of the fan relay 1 control circuit. The cooling fan relay 1 should be ON when the scan tool indicates the FC Relay 1 Command is ON. The cooling fan relay 1 should be OFF when the scan tool indicates the FC Relay 1 Command is OFF. |
| Cooling Fan Relay 1 Control Circuit High Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the fan relay control circuit. The parameter displays Malfunction if the fan relay control circuit is shorted to voltage. |
| Cooling Fan Relay 1 Control Circuit Low Voltage Test Status | Ignition ON | OK / Malfunction/Not Run | This parameter displays the state of the fan relay control circuit. The parameter displays Malfunction if the fan relay control circuit is shorted to ground. |
| Cooling Fan Relay 1 Control Circuit Open Test Status | Ignition ON | OK/Malfunction/Not Run | This parameter displays the state of the fan relay control circuit. The parameter displays Malfunction if the fan relay control circuit is open. |
| Cooling Fan Relays 2 and 3 Command | Ignition ON | ON / OFF | This parameter displays the commanded state of the fan relay 2 and 3 output. |
| Cooling Fan Relays 2 and 3 Control Circuit High Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the fan relay control circuit. The parameter displays Malfunction if the fan relay control circuit is shorted to voltage. |
| Cooling Fan Relays 2 and 3 Control Circuit Low Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the fan relay control circuit. The parameter displays Malfunction if the fan relay control circuit is shorted to ground. |
| Cooling Fan Relays 2 and 3 Control Circuit Open Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the fan relay control circuit. The parameter displays Malfunction if the fan relay control circuit is open. |
| Crankshaft Position Active Counter | Engine Idling | 0-255 Counts | This parameter displays an incrementing counter when the control module receives a signal from the crankshaft position sensor. |
| Crankshaft Position Resync Counter | Engine Idling | 4 Counts | This parameter displays the number of times the control module has to resynchronize with the crankshaft position sensor. The parameter will begin to increment if the control module does not detect a crankshaft position reference pulse. The parameter will reset to 0 after the ignition is switched OFF. |
| Crankshaft Position Sensor | Engine Running | RPM | This parameter displays engine speed. |
| Cruise Control | Cruise ON | Active / Inactive | This parameter displays the status of the cruise control system as determined by the control module. |
| Cruise Control Cancel Switch | Cruise ON | Active / Inactive / Invalid | This parameter displays the status of the cruise control cancel switch |
| Cruise Control Disengage History 1-8 | Cruise ON | Reason for Cruise Disengagement | The parameter displays the last 8 cruise control disengages in order from 1 to 8, with 8 being the most recent. There are approximately 30 possible causes for the cruise control to disengage |
| Cruise Control Inhibit Reason | Cruise OFF | Reason for Cruise Disengagement | The parameter displays the reason the cruise control system cannot engage. |
| Cruise ON | Park / Neutral | ||
| Cruise Control ON/OFF Switch | Cruise ON | ON / OFF | The engine control module (ECM) monitors the signal circuit of the cruise control switch. A closed switch is displayed as ON. |
| Cruise Control Resume/Accelerate Switch | Cruise ON | Active / Inactive / Invalid | The scan tool displays ON, when the cruise ON/OFF switch is ON and the resume/accel (+) button is pressed, the ECM detects a predetermined voltage value for the resume/accel. switch. |
| Cruise Control Set/Coast Switch | Cruise ON | ON/OFF | The scan tool displays ON, when the cruise ON/OFF switch is ON |
| Current Gear | Transmission in Park/Neutral | Park / Neutral-In Progress | This parameter displays the transmission gear commanded by the transmission control module. |
| Transmission not in Park/Neutral | Reverse / 1st-5th Drive 1 / Reverse-In Progress |
||
| Cycles of Misfire Data | Engine Running | 0-3,000 counts | This parameter displays the number of cylinder firing events recorded by the control module. |
| Cylinder 1-4 Current Misfire Counter | Engine Running | Counts | The scan tool displays a range of 0--255 counts. This parameter displays the number of misfires that have been detected during the last 255 cylinder firing events. The counters may normally display some activity, but the activity should be nearly equal for all of the cylinders, and in low numbers. |
| Cylinder 1-4 History Misfire Counter | Engine Running | Counts | The scan tool displays a range of 0-65,535 counts. The misfire history counters display the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire DTC P0300 has become active. The misfire history counters will update every 255 cylinder firing events. |
| Cylinder 1-4 Injector Control Circuit Status | Ignition ON | OK / Not Run | This parameter displays the state of the fuel injector control circuit. |
| Cylinder 1-4 Injector Disabled Misfire Detected | Engine Running | Yes / No | This parameter displays the injector that has been disabled by the misfire catalyst converter protection calibration. |
| Cylinder 1-4 Knock Detected | Engine Running | Yes / No | This parameter displays yes if a knock has been detected in an individual cylinder. |
| Deceleration Fuel Cutoff | Engine Running | Active / Inactive | This parameter displays the status of the operating mode of the control module used to turn OFF the fuel injectors and the EVAP canister purge valve during certain deceleration conditions. |
| Desired Exhaust Camshaft Position | Engine Idling | 50 Degrees | This parameter displays the desired exhaust camshaft angle as commanded by the control module. |
| Engine speed at 2000 RPM | 15 Degrees | ||
| Desired Fuel Rail Pressure | Engine Idling | Varies 3.0-5.5 MPa (435-800 psi) |
This parameter displays the desired Fuel Rail Pressure commanded by the control module. |
| Desired Idle Speed | Engine Idling | Approximately 800 RPM | This parameter displays the desired engine idle speed as commanded by the control module. The desired idle speed varies depending on engine load. |
| Desired Intake Camshaft Position | Engine Idling | 1.4 Degrees | This parameter displays the desired intake camshaft angle as commanded by the control module. |
| Engine speed at 2000 RPM | 1.4 Degrees | ||
| Desired Throttle Position | Ignition ON | 14 % | Commanded Throttle Actuator Control |
| Distance Since DTC Cleared | Ignition ON | 0 Km/mi | This parameter displays in kilometers or miles the distance traveled since a DTC was cleared. |
| ECM Authentication Status | Ignition ON | Unknown / Incorrect / Negative Response / Valid | ECM Authentication Status indicates the result of the comparison between the last received immobilizer response and the expected response calculated into the ECM. |
| ECM Response Source | Ignition ON | Ignition Switch Start / Remote Vehicle Start / Exterior PTO Vehicle Start | ECM Response Source indicates the source used to calculate the ECM response. |
| ECT Sensor | Ignition ON | 88-105°C (190-221°F) | This parameter displays the temperature of the engine coolant based on input to the control module from the engine coolant temperature (ECT) sensor. |
| Engine Controls Ignition Relay Command | Ignition ON | ON / OFF | This parameter displays the state of the control circuit for control module power relay as commanded by the control module. |
| Engine Controls Ignition Relay Control Circuit High Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the engine controls ignition relay control circuit. The parameter displays Malfunction if the engine controls ignition relay control circuit is shorted to voltage. |
| Engine Controls Ignition Relay Control Circuit Low Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the engine controls ignition relay control circuit. The parameter displays Malfunction if the engine controls ignition relay control circuit is shorted to ground. |
| Engine Controls Ignition Relay Control Circuit Open Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the engine controls ignition relay control circuit. The parameter displays Malfunction if the engine controls ignition relay control circuit is open. |
| Engine Controls Ignition Relay Feedback Signal | Ignition ON | 12.0-14.9 V | This parameter displays the voltage available at the EC ignition relay pin of the control module. |
| Engine Drag Control Status | Vehicle Moving | Active / Inactive | EDC Active (Drag Active) control mode is indicated when the requested torque signal is above the driver requested value while the traction control system signal input is active. |
| Engine Load | Engine Idling | 25-45 % | This parameter displays the calculated engine load in percent based on inputs to the control module from various engine sensors. |
| Engine speed at 2,500 RPM | 40-60 % | ||
| Engine OFF Time | Engine OFF | 0:00:00 Seconds / Varies | This parameter displays the amount of time that has elapsed since the engine was last cycled OFF. |
| Engine Oil Life Remaining | Ignition ON | 0-100 % | This parameter displays the percent of engine oil life remaining. The controller calculates the engine oil life by monitoring engine load, coolant temperature, and engine speed. |
| Engine Oil Pressure Sensor Switch | Engine Running | OK | This parameter displays the engine oil pressure as OK or Low. |
| Engine Run Time | Engine Operating | 00:00:00 Increments when the engine is operating |
This parameter displays the time elapsed since the engine was started. |
| Engine Speed | Engine Cranking | Greater than 103 RPM | This parameter displays the speed of the engine crankshaft rotation from information received from the crankshaft position sensor. If there is a crankshaft position sensor DTC, the ECM calculates the engine speed from one of the camshaft position sensors. |
| Engine Idling | 650-850 RPM | ||
| EVAP Malfunction History | Engine Running | None | This parameter displays the result of the evaporative emission (EVAP) system as determined by the control module. The scan tool will display the following:
|
| EVAP Purge Solenoid Valve Command | Engine Idling | 0 % | This parameter displays the commanded duty cycle for the canister purge output. |
| EVAP Purge Solenoid Valve Command | Ignition ON | 0-100 % | This parameter displays the on-time or duty cycle of the EVAP canister purge solenoid commanded by the control module. Zero percent indicates no purge. One hundred percent indicates full purge. |
| EVAP Purge Solenoid Valve Control Circuit High Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the evaporative emission (EVAP) purge solenoid control circuit. The parameter displays Malfunction if the EVAP purge solenoid control circuit is shorted to voltage. |
| EVAP Vent Solenoid Valve Control Circuit High Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the EVAP vent solenoid control circuit. The parameter displays Malfunction if the EVAP vent solenoid control circuit is shorted to voltage. This parameter may not change if the scan tool is used to command the EVAP vent solenoid ON. |
| EVAP Purge Solenoid Valve Control Circuit Low Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the evaporative emission (EVAP) purge solenoid control circuit. The parameter displays Malfunction if the EVAP purge solenoid control circuit is shorted to ground. |
| EVAP Vent Solenoid Valve Control Circuit Low Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the EVAP vent solenoid control circuit. The parameter displays Malfunction if the EVAP vent solenoid control circuit is shorted to ground. This parameter may not change if the scan tool is used to command the EVAP vent solenoid ON. |
| EVAP Purge Solenoid Valve Control Circuit Open Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the evaporative emission (EVAP) purge solenoid control circuit. The parameter displays Malfunction if the EVAP purge solenoid control circuit is open. |
| EVAP Vent Solenoid Valve Control Circuit Open Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the EVAP vent solenoid control circuit. The parameter displays Malfunction if the EVAP vent solenoid control circuit is open. This parameter may not change if the scan tool is used to command the EVAP vent solenoid ON. |
| EVAP Vent Solenoid Command | Engine Idling | Venting / Not Venting | This parameter displays the state of the control circuit for the evaporative emission (EVAP) vent solenoid as commanded by the control module. |
| Exhaust Camshaft Position | Engine Idling | 5 Degrees | This parameter displays the actual exhaust camshaft position in degrees. |
| Engine speed at 2000 RPM | 19 Degrees | ||
| Exhaust Camshaft Position Active Counter | Engine Idling | 0-255 | This parameter displays an incrementing counter when the control module receives a signal from the exhaust camshaft position sensor. |
| Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the exhaust camshaft position actuator solenoid valve control circuit. The parameter displays Malfunction if the camshaft actuator solenoid control circuit is shorted to voltage. |
| Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the exhaust camshaft actuator solenoid control circuit. The parameter displays Malfunction if the camshaft actuator solenoid control circuit is shorted to ground. |
| Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Open Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the exhaust camshaft position actuator solenoid valve control circuit. The parameter displays Malfunction if the camshaft actuator solenoid control circuit is open. |
| Exhaust Camshaft Position Command | Engine Idling | 47-48 % | This parameter displays the on-time or duty cycle of the exhaust camshaft position actuator solenoid valve as commanded by the control module. |
| Engine speed at 2000 RPM | 45-51 % | ||
| Exhaust Camshaft Position Variance | Engine Idling | 0.0 Degrees | This parameter displays in degrees, the difference between the desired exhaust camshaft position and the actual exhaust camshaft position. |
| Engine speed at 2000 RPM | 0.0-0.2 Degrees Varies |
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| Extended Travel Brake Pedal Position Signal | Ignition ON | Applied / Released / Invalid | This parameter will display the state of the brake pedal, applied or released. |
| Fuel Control Loop Status | Engine Idling | Open / Closed | Closed indicates that oxygen sensor 1 of each bank is being used as feedback to adjust the amount of fuel delivered to the engine. |
| Fuel Economy | Engine Idling | Varies | This parameter displays the instant fuel consumption rate of the engine in liters per hour. |
| Fuel Enrichment-Hot Catalyst | Engine Running | Yes / No | Indicates fuel is being added to cool the catalytic converter. |
| Fuel Enrichment-Hot Coolant | Engine Running | Active / Inactive | Fuel Enhancement Hot Coolant Active indicates that the conditions to enable hot coolant enrichment are active and that a richer than stoichiometric air/fuel ratio is being commanded in order to help cool the engine when a system malfunction is causing the engine to run at extreme temperatures. |
| Fuel Injector Driver Supply Voltage | Ignition ON | Varies | This parameter displays the injector driver circuit boost supply voltage. The boost voltage is monitored and a value that is too high or too low will lead to report a fail of DTC P062B |
| Fuel Level Sensor | Ignition ON | 0-5 V | This parameter displays the voltage signal received by the control module from the fuel level sensor. |
| Fuel Pressure Regulator Control Circuit Command | Engine Cranking or Running | ON / OFF | This parameter displays the commanded state of the fuel pressure regulator 1 low side output (the output is considered to be commanded ON if the regulator is enabled while the engine is running or cranking). |
| Fuel Pressure Regulator Control Circuit High Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the status of the output driver for the fuel pressure regulator control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Malfunction if there is a short to voltage in the circuit. |
| Fuel Pressure Regulator Control Circuit Low Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the status of the output driver for the fuel pressure regulator control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Malfunction if there is an short to ground in the circuit. |
| Fuel Pressure Regulator Control Circuit Open Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the status of the output driver for the fuel pressure regulator control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Malfunction if there is an open in the circuit. |
| Fuel Pressure Regulator High Control Circuit Command | Engine Idling | 60-63 % | This parameter displays the commanded duty cycle for the fuel pressure regulator 1 solenoid output. |
| Fuel Pressure Regulator High Control Circuit High Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the status of the output driver for the fuel pressure regulator high control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Malfunction if there is a short to voltage in the circuit. |
| Fuel Pressure Regulator High Control Circuit Low Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the status of the output driver for the fuel pressure regulator high control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Malfunction if there is a short to ground in the circuit. |
| Fuel Pressure Regulator High Control Circuit Open Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the status of the output driver for the fuel pressure regulator high control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Malfunction if there is an open in the circuit. |
| Fuel Pressure Sensor | Engine Idling | 372-396 kPa / (54-57.5 psi) | This parameter indicates the low side fuel pressure before the high pressure pump |
| Fuel Pump Enable Circuit High Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the status of the output driver for the fuel pump control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Malfunction if there is a short to voltage in the circuit. |
| Fuel Pump Enable Circuit Low Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the status of the output driver for the fuel pump control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Malfunction if there is a short to ground in the circuit. |
| Fuel Pump Enable Circuit Open Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the status of the output driver for the fuel pump control circuit. The scan tool will display OK if the circuit is operating correctly or Not Run if a diagnosis has not been made. The scan tool will display Malfunction if there is an open in the circuit. |
| Fuel Pump Enable Command | Ignition ON | ON / OFF | This parameter displays the commanded state of the fuel pump output (the output is considered to be commanded ON if its duty cycle is not zero) |
| Fuel Rail Pressure Regulator Command | Engine idling | 34-35 Degrees | The scan tool displays in degrees, the Fuel Rail Pressure Regulator ON time as commanded by the control module. |
| Fuel Rail Pressure Sensor | Engine Idling | 2.96-3.24 MPa (430-470 psi) Varies |
This parameter displays the high side fuel pressure after the high pressure pump |
| Fuel Rail Pressure Sensor | Engine Idling | 0.98 V | This parameter displays the voltage signal received by the control module from the fuel rail pressure (FRP) sensor. |
| Fuel Tank Pressure Sensor | Ignition ON, engine OFF | 0 in H2O / mm Hg | This parameter displays the pressure/vacuum inside the fuel tank. A negative value indicates a vacuum, while a positive value indicates a pressure. |
| Fuel Tank Pressure Sensor | Ignition ON, engine OFF | 0-5 V | This parameter displays the voltage signal received by the control module from the fuel tank pressure (FTP) sensor. |
| Fuel Tank Rated Capacity | Ignition ON | Varies | This parameter displays the capacity of the fuel tank in liters or gallons. The rated capacity displayed by the scan tool will vary with vehicle type. |
| Fuel Trim Learn | Engine Idling | Enabled / Disabled | This parameter displays Enabled when conditions are appropriate for enabling long term fuel trim corrections. This indicates that the long term fuel trim is adapting continuing amounts of short term fuel trim. If the scan tool displays Disabled, then long term fuel trim will not respond to changes in short term fuel trim. |
| Fuel Trim Memory Cell | Engine Idling | Counts 0 250 | This parameter displays long term fuel corrections that is active based upon the current operating conditions (MAP, engine speed, purge duty cycle, A/C compressor state, and transmission range). |
| Fuel Trim System Test State | Engine Idling | Disabled / Running/EVAP Purge Test Running / Complete | This parameter displays the current state of the fuel adjustment system diagnostic. |
| Fuel Volatility | Engine Idling | Varies | This parameter indicates the rate the fuel can be vaporized in the cylinder as calculated by the control module. The scan tool will display High when the fuel volatility is high. The scan tool will display Low when the fuel volatility is low. |
| Generator F-Terminal Signal | Engine Idling | 0-100 % | This parameter displays the amount of generator ON-time as commanded by the control module. The higher the percentage the greater the generator output. |
| Generator Indicator Command | Engine Idling | ON / OFF | This parameter displays ON or OFF associated with the status of the generator |
| Generator L-Terminal Circuit High Voltage Test Status | Engine Idling | OK / Malfunction / Not Run | This parameter displays the state of the generator L circuit terminal. The parameter displays Malfunction if the generator L circuit is shorted to voltage. |
| Generator L-Terminal Circuit Low Voltage Test Status | Engine Idling | OK / Malfunction / Not Run | This parameter displays the state of the generator L circuit terminal. The parameter displays Malfunction if the generator L circuit is shorted to ground. |
| Generator L-Terminal Circuit Open Test Status | Engine Idling | OK / Malfunction / Not Run | This parameter displays the state of the generator L circuit terminal. The parameter displays Malfunction if the generator L circuit is open. |
| Generator L-Terminal Command | Engine Idling | 0-100 % | This parameter displays the control modules commanded state of the voltage regulator on the generator. |
| HO2S 1 | Engine Idling | 0.05-0.9 V Varies |
This parameter displays the voltage output from the HO2S to the control module. A lower voltage indicates a lean exhaust, while a higher voltage indicates a rich exhaust. |
| HO2S 1 Heater | Engine Idling | 0.9 A | This parameter display the current feedback for the oxygen sensor heater output for sensor 1. |
| HO2S 1 Heater Control Circuit High Voltage Test Status | Engine Idling | OK / Malfunction / Not Run | This parameter displays the state of the oxygen sensor heater control circuit. The parameter displays Malfunction if the oxygen sensor heater control circuit is shorted to voltage. |
| HO2S 1 Heater Control Circuit Low Voltage Test Status | Engine Idling | OK / Malfunction / Not Run | This parameter displays the state of the oxygen sensor heater control circuit. The parameter displays Malfunction if the oxygen sensor heater control circuit is shorted to ground. |
| HO2S 1 Heater Control Circuit Open Test Status | Engine Idling | OK / Malfunction / Not Run | This parameter displays the state of the oxygen sensor heater control circuit. The parameter displays Malfunction if the oxygen sensor heater control circuit is open. |
| HO2S 1 or HO2S 2 Heater Command | Engine Idling | 0-100 % | This parameter displays the HO2S heater ON time in percentage, as commanded by the control module. |
| HO2S 1 or HO2S 2 Heater Command | Engine Idling | ON / OFF | This parameter display the state of the HO2S heater control circuit as commanded by the control module. |
| HO2S 2 | Engine Idling | 0.840-0.845 V | This parameter displays the voltage output from the HO2S to the control module. A lower voltage indicates a lean exhaust, while a higher voltage indicates a rich exhaust. |
| HO2S 2 Heater | Engine Idling | 1.2 A | This parameter display the current feedback for the oxygen sensor heater output for sensor 2. |
| HO2S 2 Heater Control Circuit High Voltage Test Status | Engine Idling | OK / Malfunction / Not Run | This parameter displays the state of the oxygen sensor heater control circuit. The parameter displays Malfunction if the oxygen sensor heater control circuit is shorted to voltage. |
| HO2S 2 Heater Control Circuit Low Voltage Test Status | Engine Idling | OK / Malfunction / Not Run | This parameter displays the state of the oxygen sensor heater control circuit. The parameter displays Malfunction if the oxygen sensor heater control circuit is shorted to ground. |
| HO2S 2 Heater Control Circuit Open Test Status | Engine Idling | OK / Malfunction / Not Run | This parameter displays the state of the oxygen sensor heater control circuit. The parameter displays Malfunction if the oxygen sensor heater control circuit is open. |
| IAT Sensor | Ignition ON | -39° to +140°C (-38° to +284°F) |
This parameter displays the temperature of the air entering the air induction system based on input to the control module from the intake air temperature (IAT) sensor. |
| Ignition 1 Signal | Ignition ON | B+ | This parameter displays B+ when the control module detects a voltage at the ignition 1 input terminal. |
| Ignition Accessory Signal | Ignition ON | ON / OFF | This parameter displays ON when the control module detects a voltage at the ignition accessory input terminal. |
| Ignition Accessory Signal | Ignition ON | ON / OFF | This parameter displays ON when the control module detects a voltage at the ignition 1 input terminal. |
| Ignition Coil 1-4 Control Circuit High Voltage Test Status | Engine Running | OK / Malfunction / Not Run | This parameter displays the state of the Ignition control circuit. The parameter displays Malfunction if the Ignition control circuit is shorted to voltage. |
| Ignition Coil 1-4 Control Circuit Low Voltage Test Status | Engine Running | OK / Malfunction / Not Run | This parameter displays the state of the Ignition control circuit. The parameter displays Malfunction if the Ignition control circuit is shorted to ground. |
| Ignition Coil 1-4 Control Circuit Open Test Status | Engine Running | OK / Malfunction / Not Run | This parameter displays the state of the Ignition control circuit. The parameter displays Malfunction if the Ignition control circuit is open. |
| Ignition Cycles Since recommended Maximum Fuel Alcohol Content Exceeded | Ignition ON | Counts | This parameter displays the number of ignitions cycles since the most recent time that the Recommended Ethanol Concentration Exceeded failed. This parameter value will reset when a code clear is performed. If a Recommended Ethanol Concentration Exceeded event has not taken place (either initially or after a code clear), this parameter default's to zero. |
| Ignition Timing | Engine Idling | 8.5-11° | This parameter displays the final spark advance in terms of a crankshaft angle |
| Immobilizer Auto Learn Counter | Ignition ON | Counts | This parameter displays the number of auto learn cycles that have been successfully completed within the immobilizer system. |
| Immobilizer Automatic Learn Timer | Ignition ON | h/m/s | This parameter displays the time elapsed within the current auto learn cycle within the immobilizer system. |
| Immobilizer Password Learn | Ignition ON | Inactive | Indicates that learning of immobilizer code information is enabled. |
| Immobilizer Password Learn Scan Tool Delay | Ignition ON | Active / Inactive | Active indicates that the security code has been accepted but the scan tool learn delay is active and will not allow learning enabled, programming security code, or resetting security code. |
| Immobilizer Security Code Accepted | Ignition ON | Yes / No | Security Code Accepted displaying Yes indicates that the received security code is correct |
| Immobilizer Security Code Lockout | Ignition ON | No | Indicates that the security code has not passed and lockout is active. |
| Immobilizer Security Code Lockout Active Timer | Ignition ON | ms | This parameter displays the time elapsed since the immobilizer security code lockout has been activated either due to a battery disconnect or an incorrect immobilizer security code being entered |
| Immobilizer Security Code Programmed | Ignition ON | Yes / No | Security Code Programmed indicates that the security code has been programmed. |
| Immobilizer Security Code Programming Counter | Ignition ON | Counts | This parameter displays the number of times a new immobilizer security code has been programmed through secure access. This counter can only be incremented. |
| Immobilizer Security Code Reset Counter | Ignition ON | Counts | This parameter displays the number of times the immobilizer security code has been reset to the default value through secure access. This counter can only be incremented. |
| Immobilizer Security Information Programmed | Ignition ON | Yes/No | This parameter displays the status of the immobilizer system |
| Immobilizer System Status | Ignition ON | Standby / Immobilized at Startup / Immobilized - No Response / Immobilized Negative Response / Immobilized - Incorrect Response / Post-Release State / Pre-Release State / Release State | This parameter displays the status of the immobilizer system |
| Immobilizer Valid Response Received Time | Ignition ON | ms | This parameter displays the actual time observed for a valid immobilizer response. |
| Injector Duty Cycle | Engine idling | 0.82-1.50 ms Varies |
This parameter displays the amount of fuel injector ON time or pulse width as commanded by the control module. |
| Intake Camshaft Position | Engine Idling | 1 Degrees | This parameter displays the actual intake camshaft position in degrees. |
| Engine speed at 2000 RPM | 1 Degrees | ||
| Intake Camshaft Position Active Counter | Engine Idling | 0-255 | This parameter displays an incrementing counter when the control module receives a signal from the intake camshaft position sensor. |
| Intake Camshaft Position Command | Engine Idling | 44 % | This parameter displays the ON-time or duty cycle of the intake camshaft position actuator solenoid valve as commanded by the control module. |
| Engine speed at 2000 RPM | 43-45 % | ||
| Intake Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status | Engine Idling | OK / Malfunction / Not Run | This parameter displays the state of the intake camshaft position actuator solenoid valve control circuit. The parameter displays Malfunction if the camshaft actuator solenoid control circuit is shorted to ground. |
| Intake Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Test Status | Engine Idling | OK / Malfunction / Not Run | This parameter displays the state of the intake camshaft position actuator solenoid valve control circuit. The parameter displays Malfunction if the camshaft actuator solenoid control circuit is shorted to voltage. |
| Intake Camshaft Position Actuator Solenoid Valve Control Circuit Open Test Status | Engine Idling | OK / Malfunction / Not Run | This parameter displays the state of the intake camshaft position actuator solenoid valve control circuit. The parameter displays Malfunction if the camshaft actuator solenoid control circuit is open. |
| Intake Camshaft Position Variance | Engine Idling | 0 Degrees | This parameter displays in degrees, the difference between the desired intake camshaft position and the actual intake camshaft position. |
| Engine speed at 2000 RPM | 0° | ||
| Intake Manifold Pressure | Engine Idling | 64.8-66.8 kPa (9.4-9.7 psi) | This parameter displays the engine intake manifold vacuum pressure calculated as the difference between ambient air pressure (barometric pressure) and intake manifold absolute pressure (MAP). |
| Knock Retard | Engine Idling | 0° | This parameter indicates the amount of spark advance the control module removes from the ignition control (IC) spark advance in response to the signal from the knock sensors. |
| Long Term Fuel Trim | Engine Idling | -9 % | This parameter displays the commanded Long Term Fuel Trim correction by the control module for cruise and acceleration conditions. |
| Long Term Fuel Trim Test Average | Engine Idling | 0 % | This parameter displays the filtered long term closed loop fuel correction for bank 1 or 2. This value is compared to thresholds to determine if the fuel adjustment system diagnostic is passing or failing or if an excess purge vapor test should be executed. |
| Long Term Fuel Trim Test Average without Purge | Engine Idling | -9 % | This parameter displays the filtered non purge long term closed loop fuel correction. This value is compared to thresholds to determine if the fuel adjustment system diagnostic is passing, failing, or indeterminate during normal purge-OFF operation as well as during the intrusive excess purge vapor test. |
| Low Engine Oil Pressure Indicator Command | Engine Idling | ON / OFF | This parameter displays the commanded state of the low EOP lamp control circuit by the control module. |
| MAF Performance Test | Engine Idling | OK | This parameter displays the status of the mass air flow (MAF) performance test by the ECM. The scan tool will display OK if no malfunction is found. The scan tool will display Malfunction if the control module detects a malfunction during the test. |
| MAP Performance Test 1 | Engine Idling | OK / Malfunction | Indicates that the filtered MAP Test 1 residual (the difference between the measured intake manifold pressure and the intake manifold pressure predicted from the intake manifold model using the mass airflow predicted from the throttle model) exceeds a failure threshold. |
| MAP Performance Test 2 | Engine Idling | OK / Malfunction | Indicates that the filtered MAP Test 2 residual (the difference between the measured intake manifold pressure and the intake manifold pressure predicted from the intake manifold model using the measured mass airflow) exceeds a failure threshold |
| MAP Sensor | Engine Idling | 30-32 kPa (4.35-4.64 psi) | This parameter displays the actual engine intake manifold absolute pressure (MAP). |
| MAP Sensor | Engine Idling | 0.4-2.0 V Varies With Altitude |
This parameter displays Volts. The MAP sensor measures the change in the intake manifold pressure which results from engine load and sped changes. As the intake manifold pressure increases, the air density in the intake also increases and additional fuel is required. The scan tool displays a range of 10-105 kPa. The MAP sensor measures the absolute pressure in the intake manifold. |
| MAF Sensor | Engine Idling | 3.0-8.3 g/s | This parameter displays in grams per second, the measured quantity of air flowing into the engine during all operating conditions. |
| Engine speed at 2,500 RPM | 11.88 g/s | ||
| MAF Sensor | Engine Idling | 1,700-1,800 Hz | The scan tool displays a range of 0-65,555 hertz. This parameter displays the frequency signal input to the control module, and represents measured quantity of air flowing into the engine during all operating conditions. |
| MIL Command | Ignition ON | ON / OFF | This parameter displays the commanded state of the malfunction indicator lamp (MIL) control circuit by the control module. |
| MIL Control Circuit Low Voltage Test Status | Ignition ON | OK / Not Run | This parameter displays the state of the MIL control circuit. The parameter displays Malfunction if the MIL control circuit is shorted to ground. |
| MIL Control Circuit Open Test Status | Ignition ON | OK / Not Run | This parameter displays the state of the MIL control circuit. The parameter displays Malfunction if the MIL control circuit is open. |
| MIL Control Circuit High Voltage Test Status | Ignition ON | OK / Not Run | This parameter displays the state of the MIL control circuit. The parameter displays Malfunction if the MIL control circuit is shorted to voltage. |
| MIL Requested by DTC | Ignition ON | Yes / No | This parameter indicates the reason the control module illuminated the MIL. The scan tool will display Yes when the MIL is requested as a result of an A or B type DTC. The scan tool will display No if the MIL is illuminated for another reason, such as transmission DTCs. |
| Power Enrichment | Engine Idling | Inactive | This parameter displays the status of the operating mode of the control module used to increase fuel delivery during certain acceleration conditions. |
| Power Mode | Ignition ON - Run | OFF / Accessory / Run / Crank Request | This parameter displays the state of the System Power Mode. This signal is based upon the state of the system power mode received over serial communication from the vehicle electronics. If the serial data signal is not received, the parameter will display OFF. |
| Reduced Engine Power History | Ignition ON | Throttle Malfunction / Cooling Fan Malfunction / Engine Over-temperature Protection Active | This parameter Displays the last reason that Powertrain has illuminated the Reduced Engine Power (REP) indication. |
| Redundant Odometer Memory | Ignition ON | Present / Not Present | Indicates if the ECU odometer value has been programmed |
| Remaining Fuel in Tank | Ignition ON | % | This parameter displays the total fuel level as a percentage of the rated capacity of the fuel tank. |
| Remaining Fuel in Tank | Ignition ON | Liters / Gallons | This parameter displays the actual total fuel volume contained in the fuel tank. |
| Remote Vehicle Start Disable History 1-8 | Engine Cranking | Reason for RVS Disable | These parameters display the last eight reasons the control module disabled remote vehicle start (RVS). |
| Remote Vehicle Start Request Signal | Ignition OFF | ON / OFF | Remote Vehicle Start Request indicates the state of the request received over serial communication from the remote vehicle start (RVS) system to start the vehicle in remote mode. |
| Short Term Fuel Trim | Engine Idling | 0 to -4 % | This parameter displays the short-term correction to the fuel delivery by the control module in response to oxygen sensor 1 or 2. If the oxygen sensor indicates a lean air/fuel mixture, the control module will add fuel increasing the short term fuel trim above 0. If the oxygen sensor indicates a rich air/fuel mixture, the control module will reduce fuel decreasing the short term fuel trim below 0. |
| Short Term Fuel Trim Test Average | Engine Idling | 0-2 % | This parameter displays the filtered short term closed loop fuel correction for HO2S Sensor 1. This value is compared to thresholds to determine if the fuel adjustment system diagnostic is passing or failing or if an excess purge vapor test should be executed. |
| Starter Relay Command | Ignition switch not in the crank position | ON / OFF | This parameter indicates whether the control module is commanding the starter relay to go ON or OFF. |
| Ignition switch in the crank position | ON | ||
| Starter Relay Control Circuit High Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the starter relay control circuit. The parameter displays Malfunction if the starter relay control circuit is shorted to voltage. This parameter may not change if the scan tool is used to command the relay control circuit ON. |
| Starter Relay Control Circuit Low Voltage Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the starter relay control circuit. The parameter displays Malfunction if the starter relay control circuit is shorted to ground. This parameter may not change if the scan tool is used to command the relay control circuit ON. |
| Starter Relay Control Circuit Open Test Status | Ignition ON | OK / Malfunction / Not Run | This parameter displays the state of the starter relay control circuit. The parameter displays Malfunction if the starter relay control circuit is open. This parameter may not change if the scan tool is used to command the relay control circuit ON. |
| Start-Up ECT | Ignition ON | -39° to +140°C (-38° to +284°F) | This parameter displays the temperature of the engine coolant on start-up based on input to the control module from the ECT sensor. |
| Start-Up IAT | Ignition ON | -39° to +140°C (-38° to +284°F) | This parameter displays the temperature of the intake air at start in the air induction system based on input to the control module from the IAT sensor. |
| TAC Forced Engine Shutdown | Ignition ON | Yes / No | This parameter indicates the status of the TAC motor by the control module. The scan tool will display Yes if the engine has been shut down due to a throttle control fault. |
| TAC Motor | Ignition ON | Enabled / Disabled | This parameter indicates the status of the throttle actuator control (TAC) motor driver in the control module. The scan tool will display Enabled if TAC motor operation is allowed. The scan tool will display Disabled if the control module detects a condition that affects TAC motor operation. |
| TAC Motor Control | Ignition ON | 0 % | This parameter displays the commanded duty cycle for the throttle actuator output. |
| Throttle Body Idle Air Flow Compensation | Engine Idling | 0 % | This parameter displays the percent compensation of the Learned Airflow Variation Calibration. This value indicates the current amount of airflow compensation in response to engine intake airflow restrictions. It can also be used as feedback for the Learned Airflow Adapts Reset Trigger Device Control. |
| Throttle Position Performance Test | Engine Idling | OK / Malfunction | Indicates that the filtered throttle position residual (the product of the MAF residual and the MAP Test 1 residual) exceeds a failure threshold. |
| Throttle Position Sensor 1 or 2 Position | Engine Idling | % | These parameters provide the percentage of the total travel or displacement of the sensor accounting for consideration of the learned minimum position. Also these parameters should always indicate 0 % at closed throttle and 100 % or near 100 % at wide open throttle. |
| Throttle Position | Ignition ON | 0-100 % | This parameter displays the desired throttle position angle commanded by the control module. |
| Throttle Position Sensor 1 | Ignition ON | 3.1-4.3 V | This parameter displays the actual voltage on the throttle position sensor 1 signal circuit as measured by the control module. |
| Throttle Position Sensor 1 Learned Minimum | Ignition ON | 0.51-0.91 V | This parameter displays the learned minimum value of throttle position sensor 1 as recorded by the control module during the last learn procedure. |
| Throttle Position Sensor 2 | Ignition ON | 1.51-1.81 V | This parameter displays the actual voltage on the throttle position sensor 2 signal circuit as measured by the control module. |
| Throttle Position Sensor 2 Learned Minimum | Ignition ON | 0.51-0.91 V | This parameter displays the learned minimum value of throttle position sensor 2 as recorded by the control module during the last learn procedure. |
| Throttle Position Sensors 1 and 2 | Ignition ON | Agree / Disagree | This parameter displays Disagree when the control module detects that throttle position sensor 1 voltage signal is not within the correct relationship to throttle position sensor 2. The scan tool displays Agree under the normal operating conditions. |
| Torque Delivered Signal | Vehicle Moving | Y / Lb Ft | This parameter displays the engine torque based upon the airflow through the engine and the torque losses due to spark retard and fuel shutoff. Since this is a steady state engine torque, it does not include the inertial component of engine torque. |
| Torque Management Ignition Timing Retard | Engine Idling | 19.1-21.2° | This parameter displays the total spark retard (in terms of a crankshaft angle). |
| Torque Request Inhibit-Fuel | Engine Idling | Yes / No | This parameter displays the existing condition in the ECM causing the transmission torque request to be limited. |
| Torque Request Inhibit-Ignition Timing | Engine Idling | Yes / No | This parameter displays the existing condition in the ECM causing the transmission torque request to be limited. |
| Torque Request Inhibit-Ignition Timing Advance | Engine Idling | Yes / No | This parameter displays the existing condition in the ECM causing the transmission torque request to be limited. |
| Torque Request Inhibit-Minimum Idle | Engine Idling | Yes / No | This parameter displays the existing condition in the ECM causing the transmission torque request to be limited. |
| Torque Request Inhibit-Minimum Torque | Engine Idling | Yes / No | This parameter displays the existing condition in the ECM causing the transmission torque request to be limited. |
| Torque Request Inhibit-TAC | Engine Idling | Yes / No | This parameter displays the existing condition in the ECM causing the transmission torque request to be limited. |
| Torque Request Inhibit-TAC Limit | Engine Idling | Yes / No | This parameter displays the existing condition in the ECM causing the transmission torque request to be limited. |
| Total Knock Retard | Engine Idling | 0° | This parameter displays how much ignition spark timing is being retarded due to all control systems monitored by the control module. |
| Total Misfire | Engine Idling | 0 Counts | This parameter displays the total number of cylinder firing events that the control module detected as misfires for the last 200 crankshaft revolution sample period. |
| Traction Control Status | Ignition ON | Active / Inactive | This parameter displays Active if the electronic brake and traction control module (EBTCM) is commanding traction control. |
| Vehicle Speed Sensor | Vehicle Moving | km/h MPH |
This parameter displays the speed of the vehicle as calculated by the transmission control module (TCM) from information received from the vehicle speed sensor (VSS). |
| VIN Programming Counter | Ignition ON | Counts | This parameter displays the number of times the VIN has been programmed. This counter can only be incremented. |
| Warm-Ups Since DTC Cleared | Ignition ON | 0 Counts | This parameter indicates the number of warm-up cycles that have occurred since DTCs were cleared. The scan tool will display higher counts as more warm up cycles have occurred since the DTCs were cleared. |
| Warm-Ups without Emission Malfunctions | Ignition ON | 0 Counts | This parameter displays the number of OBD defined warm-up cycles since the last emissions related (fault type A or B) fail report or MIL request. Emissions related DTCs are cleared from memory when this counter reaches 40. |
| Warm-Ups without Non Emission Malfunctions | Ignition ON | 0 Counts | This parameter displays the number of OBD defined warm up cycles since the last non-emissions related (fault type C) fail report. Non-emissions related DTCs are cleared from memory when this counter reaches 40. |
| Wide Open Throttle | Ignition ON | Yes / NO | This parameter displays the throttle status commanded by the control module. The scan tool will display Yes if the vehicle throttle is commanded to 100 percent. |
Engine Control Module (ECM) Scan Tool Output Controls
| Output Control | Description |
|---|---|
| Camshaft Position Actuator System Intake/Exhaust | This function controls the selected camshaft actuator solenoid. The normal commanded state is NONE. The system will increase or decrease the angle of the selected camshaft in 5 degree increments up to 40 crankshaft degrees. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. |
| Clutch Pedal Position Learn | This device control is used to trigger the procedure to learn the clutch pedal fully applied position. |
| Compression Test | This device control is used to set up the internal combustion engine for a compression test. The fuel pump, fuel injectors, and spark are all disabled. The throttle is opened to a Wide Open Throttle (WOT) position. For conventional engine vehicles, the extended crank feature is not active, and for strong hybrid vehicles, the Hybrid Powertrain Control Module is configured to crank at the speed specified in the device control command. Engine cranking is completely controlled by the technician either through the ignition key or through a remote starter switch as applicable. The device control limits and rejects will apply normally upon entry to the device control. Once the device control is active, the limits will be monitored (to prevent unwanted starter operation, for example), but in the case of a limit exceeded or a tester disconnect, device control of the fuel and spark will not be released until the Power Mode switches to Accessory or OFF. This will prevent unexpected fuel and spark operation in the case of a device control abort. |
| Cooling Fan | This function activates the cooling fan relay 1. The normal commanded state of the fan relay is NONE. The relay command status can also be monitored on the scan tool data parameter Cooling Fan Relay 1 Command. The control module allows cooling fan relay control when the following conditions are met: .
|
| Cooling Fan Relays 2 and 3 | This function activates the cooling fan relay 2 and relay 3. The normal commanded state of the fan relays is NONE. The relay command status can also be monitored on the scan tool data parameter 2 and 3 Command. The control module allows cooling fan relay control when the following conditions are met:
|
| Cooling Fan Relays 1, 2 and 3 | This function activates the cooling fan relay 1, 2 and 3. The normal commanded state of the fan relays is NONE. The relay command status can also be monitored on the scan tool data parameters Cooling Fan Relay 1 Command and Cooling Fan Relays 2 and 3 Command. The control module allows cooling fan relay control when the following conditions are met:
|
| Crankshaft Position Variation Learn | This device control is used to activate the crankshaft position variation learn algorithm which calculates the reference pulse correction factors for the misfire diagnostic. |
| Cylinder Power Balance | This device control is used to override the state of the fuel injector outputs. This device control is used to disable injectors in order to cut off fuel to the associated cylinders. |
| Depressurize Fuel System | When the low pressure fuel pump is used in conjunction with a separate high pressure fuel pump for Direct Injection (DI) engines, this device control can be used to reduce the high fuel pressure to a low working level. The high fuel pressure control shall monitor the low pressure "Fuel Pump Device Control with Engine Running" such that when the low pressure pump is commanded OFF the high pressure pump will be controlled to a low pressure value. This combination shall be held until either the device control is released, or the engine stalls. |
| Engine Controls Ignition Relay | This device control is used to override the state of the relay. |
| Engine Oil Life Reset | This device control contains the engine oil remaining life determined from an algorithm based upon the effective engine revolutions and the distance driven since the last oil change. This device control may be used to reset the engine oil remaining life to 100 % after an oil change or to any other value when replacing a control module |
| Engine Speed | This function controls the idle speed override in 25 RPM, 100 RPM, and 500 RPM increments, from the base idle speed to 1,400 RPM. The scan tool initiates the test when the following conditions are met:
The engine speed will remain in the commanded state until cancelled by the scan tool. |
| EVAP Purge/Seal |
NOTE:
This function activates both the EVAP purge solenoid valve and EVAP vent solenoid to seal the EVAP system. When activated, the purge valve is commanded to 0 percent and the vent valve is commanded ON, Not-venting. The normal commanded state for both solenoids is None. Both of the solenoids remain in the commanded state until cancelled by the scan tool or the FTP sensor exceeds -24 mm Hg (-12 inch H20).The EVAP Purge and Vent Solenoid Valve Command parameters may not change states when using this output control. |
| EVAP Purge Solenoid Valve |
NOTE:
This function controls the evaporative emission (EVAP) purge solenoid valve. The normal commanded state is NONE. The system will increase or decrease the amount of purge by changing the duty cycle of the purge valve in 10 percent increments within a range of 0-100 percent. The system remains in the commanded state until cancelled by the scan tool or the fuel tank pressure (FTP) sensor exceeds -24 mm Hg (-12 inch H20).The EVAP Purge Solenoid Valve Command parameter may not change states when using this output control. |
| EVAP Vent Solenoid Valve |
NOTE:
This function controls the EVAP vent solenoid. The normal commanded state is NONE. When commanded ON, the vent valve switches to Not-venting. The system remains in the commanded state unless one of the following conditions occur:The EVAP Vent Solenoid Valve Command parameter may not change states when using this output control.
|
| Exhaust Camshaft Position Actuator | This device control is used to override the state of the exhaust cam output. The commanded camshaft position is expressed in terms of degrees of camshaft rotation (retard for exhaust camshaft) from the park position (a camshaft position of zero represents the park position). |
| Exhaust Camshaft Position Actuator Solenoid Valve | This device control is used to override the state of the exhaust cam solenoid output. |
| Fuel Control Loop Status | This function controls the heated oxygen sensor (HO2S) loop status. The commanded states include NONE, OPEN, and CLOSED. The normal commanded state is NONE. The loop status changes as commanded, OPEN or CLOSED. The system remains in the commanded state until cancelled by the scan tool. |
| Fuel Injector Balance | This function enables the fuel injector in order to verify the correct fuel injector flow. The ECM will pulse the selected fuel injector when the following conditions are met:
The selected fuel injector can only be flowed/pulsed once per ignition cycle. |
| Fuel Pressure | This function allows control of the high pressure fuel pump actuator which is integral to the high pressure fuel pump. The system will Increase or Decrease the fuel rail pressure in increments, as commanded within an approximate range of 414-17,237 kPa (60-2500 psi). The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state for about 30 seconds or until cancelled by the scan tool or the ECM detects a vehicle speed. |
| Fuel Pressure Regulator | This device control is intended for use on a Direct Injection (DI) high pressure fuel supply system to activate the high pressure fuel pump actuator at ignition ON, engine OFF. Both the low side and high side of the actuator are controlled together. Commanding the actuator to ON will modulate the high side driver to a calibratible Maximum Duty Cycle. (Note: As this is an electrical circuit test, an actuator commanded to ON does not necessarily equate to the regulator state at maximum fuel pressure.) |
| Fuel Pump Enable | This function controls the fuel pump. The normal commanded state is NONE. The scan tool initiates the test when the following conditions are met:
When commanded ON/OFF, the engine control module (ECM) turns the fuel pump module ON/OFF. If the engine is running and the fuel pump is commanded OFF, the engine will stall. The system remains in the commanded state for about 2 seconds or until cancelled by the scan tool or the ECM detects a vehicle speed. |
| Fuel Trim Enable | This function disables the control modules ability to learn new fuel trim parameters. The commanded states are NONE, ENABLED, DISABLED. The normal commanded state is NONE. The system remains in the commanded state until cancelled by the scan tool. |
| Fuel Trim Reset | This function is used to reset the learned fuel trim values to their initial values. |
| Generator L-Terminal | Commands the generator L terminal ON and OFF. |
| HO2S Heater Learn | This device control is used to trigger the reset of the learned resistances for the oxygen sensor heaters following a replacement in service. The learned resistances are reset to a calibration used to prevent overheating of the sensors until more accurate resistances may be learned following an extended engine OFF time (typically 12 or more hours). |
| HO2S Heater Sensor 1 | This device control is used to override the duty cycle of the oxygen sensor heaters. With the engine OFF, this device control is intended to be used as a discrete control for circuit diagnosis. With the engine OFF, none of the oxygen sensor heaters can be commanded ON for more than 3.0 seconds, after which the selected oxygen sensor heater must be disabled for a limited duration (typically 60 seconds) before it may be enabled again. With the engine running, this device control is used to operate the oxygen sensor heaters at the various duty cycles available to the engine controller. |
| HO2S Heater Sensor 2 | This device control is used to override the duty cycle of the oxygen sensor heaters. With the engine OFF, this device control is intended to be used as a discrete control for circuit diagnosis. With the engine OFF, none of the oxygen sensor heaters can be commanded ON for more than 3.0 seconds, after which the selected oxygen sensor heater must be disabled for a limited duration (typically 60 seconds) before it may be enabled again. With the engine running, this device control is used to operate the oxygen sensor heaters at the various duty cycles available to the engine controller. |
| Idle Ignition Timing | Disables and enables idle spark advance with the engine running. |
| Idle Learn | This function allows the throttle position and the idle speed to be relearned by the ECM, once the following conditions have been met.
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| Ignition Timing Retard | This device control is used to retard the spark angle from the software calculated spark angle. For example, if the software calculated spark angle was 15 degrees advanced and this device control requested a 3 degree retard, the commanded spark angle that would be delivered would be 12 degrees advanced. |
| Malfunction Indicator Lamp (MIL) | This function controls the malfunction indicator lamp (MIL). The normal commanded state is NONE. When commanded ON/OFF, the ECM turns the MIL ON/OFF. The system remains in the commanded state until cancelled by the scan tool. |
| Misfire Graphic | This function clears the misfire graphics from the scan tool. |
| Programming History | This function displays the history buffer entries for the primary calibration part in the engine controller |
| Remote Vehicle Start Disable History Reset | This function clears the remote vehicle start (RVS) disable history. When RESET is selected the reason the control module did not allow RVS in the last 8 attempts is cleared. |
| Starter Relay | Commands the starter relay ON and OFF. |
| Throttle Position | This device control is used to override the commanded throttle position. |
| Throttle Sweep | This function moves the Throttle plate slowly from a closed position to wide open position, aiding diagnosis of TAC motor. |