Scan Tool Data List
The Engine 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 Trouble Code (DTC) List - Vehicle is completed
- No 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.
IMPORTANT:
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. If all values are within the typical range described below, refer to Symptoms - Engine Controls for diagnosis.
The column labeled Data List indicates where a parameter can be located on the scan tool. Refer to the scan tool operating manual for the exact locations of the data lists. The following is a description of each term listed:
- Eng
-
Engine data
- CMP Actuator
-
Camshaft Position (CMP) Actuator data
- EVAP
-
Evaporative emission (EVAP) data
- FUEL TRIM
-
Fuel trim data
- HO2S
-
Heated Oxygen Sensor (HO2S) data
- Ignition
-
Ignition System data
- Induction:
-
Induction data
- Misfire
-
Misfire data
- TAC Output
-
Throttle Actuator Control Data
Scan Tool Data List
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off/Brake Pedal Released | |||
| 5 Volt Reference 1 Circuit Status | EVAP, Ignition, Induction, TAC | OK/Fault | OK |
| 5 Volt Reference 1 Circuit Status | EVAP, Ignition, Induction, TAC | OK/Fault | OK |
| A/C Relay Command | Eng, Indiction, Misfire, TAC | On/Off | Off |
| Air Flow Calculated | Eng, Fuel Trim, HO2S, Misfire, TAC | g/s | 3-6 g/s |
| Air Fuel Ratio | Eng, Fuel Trim, HO2S, Induction | Ratio | 1.0-1 varies |
| Ambient Air Temperature | Engine, EVAP | Degrees | varies |
| APP Indicated Angle | CMP Actuator, Eng, EVAP, HO2S, Ignition, Induction, Misfire, TAC, Fuel Trim | Percent | 0 |
| APP Sensors | TAC | Percent | 0 |
| APP Sensor 1 | TAC | Volts | Varies |
| APP Sensor 1 Circuit | TAC | OK/Not OK | OK |
| APP Sensor 1 Indicated Angle | TAC | Percent | 0 |
| APP Sensor 2 | TAC | Volts | Varies |
| APP Sensor 2 Circuit | TAC | OK/Not OK | OK |
| APP Sensor 2 Indicated Angle | TAC | Percent | 0 |
| APP Sensor 1 | TAC | Percent | Varies |
| APP Sensor 2 | TAC | Percent | Varies |
| APP Sensor 1 and 2 | TAC | Agree/Disagree | Agree |
| BARO | Eng, EGR, EVAP, Fuel Trim, HO2S, Ignition | kPa | 65-110 kPa |
| BPP Signal | Engine, TAC | Applied/Released/Invalid | Released |
| Calculated TWC Temperature Bank 1 | Fuel Tim, Misfire | °C/°F | Varies |
| Calculated TWC Temperature Bank 1 | Fuel Tim, Misfire | °C/°F | Varies |
| Catalytic Converter Protection Active | Fuel Trim, HO2S | Yes/No | No |
| CKP Active Counter | Ignition | Counts | varies |
| CKP sensor | Ignition | RPM | 650-950 |
| CKP Resync Counter | Ignition | Counts | varies |
| CMP Active Counter | CMP Actuator | counts | 0-250 |
| CMP Angle | CMP Actuator | Degrees of camshaft actuation | 0° |
| CMP Command | CMP Actuator | percent | 0% |
| CMP Sensor | CMP Actuator, Ignition, Misfire | RPM | Varies |
| CMP Solenoid Circuit Status | CMP Actuator | OK, Short to Gnd, Open, Short to B+, Incomplete | OK |
| CMP Variance | CMP Actuator | Degrees of camshaft actuation | 0° |
| CPP Switch (if equipped) | Engine, TAC | Applied/Released/Invalid | Released |
| Cruise Control Active | Engine, TAC | Active/Inactive/Invalid | Inactive |
| Cycles of Misfire Data | Misfire | Counts | 0-99 |
| Cylinder 1 and 4 IC Circuit Status | Misfire | OK/Fault | OK |
| Cylinder 2 and 5 IC Circuit Status | Misfire | OK/Fault | OK |
| Cylinder 3 and 6 IC Circuit Status | Misfire | OK/Fault | OK |
| Cold Start Up | EVAP | Yes/No | Varies on startup |
| Decel Fuel Cut-off | Eng, EGR, Fuel Trim, HO2S | Active/Inactive | Inactive |
| Desired Idle Speed | CMP Actuator, Engine, EVAP, Induction, TAC | RPM | Varies |
| Distance Since DTC Cleared | Engine | km/Miles | Varies |
| EC Ignition Relay Command | Engine | ON/OFF | ON |
| EC Ignition Relay Circuit Status | Engine, TAC | OK, Short to Gnd, Open, Short to B+, Incomplete | OK |
| EC Ignition Relay Feed Back Signal | Engine, TAC | Volts | 13.0-14.2 |
| EC Ignition Relay Command | TAC | ON/OFF | ON |
| ECT Sensor | CMP Actuator, Eng, EVAP, HO2S, Fuel Trim, Ignition, Induction, Misfire, TAC | °C/°F | Varies |
| Engine Load | CMP Actuator, Eng, Misfire, Fuel Trim, EVAP, EGR, HO2S, Ignition, TAC | Percent | 0 |
| Engine Oil Pressure Sensor | CMP Actuator, Engine, Misfire | kPa/PSI | 15-25 PSI |
| Engine Oil Level Switch | CMP Actuator, Engine | Low/OK | OK |
| Engine Oil Life Remaining | CMP Actuator, | percent | varies |
| Engine Oil Temperature | CMP Actuator, | degrees | varies |
| Engine Off Time | EVAP | Hr: Min: Sec | Varies |
| Engine Run Time | CMP Actuator, Engine, EVAP, Fuel Trim, HO2S, Ignition, Induction, Misfire, TAC | Hr: Min: Sec | Varies |
| Engine Speed | CMP Actuator, Engine, EVAP, HO2S, Ignition, Induction, Misfire, Fuel Trim, TAC | RPM | Varies |
| EVAP Fault History | EVAP | No Fault/Excess Vacuum/Purge Valve Leak/Small Leak/Weak Vacuum/No Test Result | No Fault |
| EVAP Purge Solenoid Circuit Status | EVAP | OK/Open/Short | OK |
| EVAP Purge Solenoid Command | Eng, EVAP, Fuel Trim, HO2S | Percent | 0-2% |
| EVAP Test Abort Reason | EVAP | No Aborted/Lost Enable/Small Leak/Veh. Not At Rest | Varies |
| EVAP Test Result | EVAP |
|
Varies |
| EVAP Test State | EVAP | Waiting for Purge/Test Running/Test Completed | Varies |
| EVAP Vent Solenoid Circuit Status | EVAP | OK, Short to Gnd, Open, Short to B+, Incomplete | OK |
| EVAP Vent Solenoid Command | Eng, EVAP | Venting/Not Venting | Venting |
| Fuel Level Sensor | EVAP | Volts | Varies |
| Fuel Pump Relay Circuit Status | Engine | OK, Short to Gnd, Open, Short to B+, Incomplete | OK |
| Fuel Pump Relay Command | Engine | On/Off | On |
| Fuel Tank Level Remaining | Engine, EVAP, Fuel Trim, Misfire | Percent | 0-104 |
| Fuel Tank Pressure Sensor | Engine, EVAP | mm Hg/in H2O | Varies |
| Fuel Tank Pressure Sensor | EVAP | Volts | Varies |
| Fuel Trim Cell | Engine, EVAP, Fuel Trim | 0-20 | 17 |
| Fuel Trim Learn | Engine, EVAP, Fuel Trim | Enabled/Disabled | Varies |
| Fuel Trim System Test State | Fuel Trim | Disabled/Enabled/Run Purge test | varies |
| Fuel Volatility | EVAP, Fuel Trim | Low/Moderate/High | varies |
| HO2S Bank 1 Sensor 1 | Engine, EVAP, Fuel Trim, Induction, HO2S | millivolts | 300-900 and Varying |
| HO2S Bank 1 Sensor 2 | Eng, Fuel Trim, HO2S | millivolts | 400-600 and Varying |
| HO2S Bank 2 Sensor 1 | Engine, EVAP, Fuel Trim, Induction, HO2S | millivolts | 300-9000 and Varying |
| HO2S Bank 2 Sensor 2 | Eng, Fuel Trim, HO2S | millivolts | 400-600 and Varying |
| HO2S Bank 1 Sensor 1 Heater Command | HO2S | percent | varies |
| HO2S Bank 1 Sensor 1 Heater | HO2S | Amps | varies |
| HO2S Bank 1 Sensor 1 Heater Circuit Status | HO2S | OK, Short to Gnd, Open, Short to B+, Incomplete | OK |
| HO2S Bank 1 Sensor 2 Heater Command | HO2S | percent | Varies |
| HO2S Bank 1 Sensor 2 Heater | HO2S | Amps | varies |
| HO2S Bank 1 Sensor 2 Heater Circuit Status | HO2S | OK, Short to Gnd, Open, Short to B+, Incomplete | OK |
| HO2S Bank 2 Sensor 1 Heater Command | HO2S | percent | varies |
| HO2S Bank 2 Sensor 1 Heater | HO2S | Amps | varies |
| HO2S Bank 2 Sensor 1 Heater Circuit Status | HO2S | OK, Short to Gnd, Open, Short to B+, Incomplete | OK |
| HO2S Bank 2 Sensor 2 Heater Command | HO2S | Percent | Varies |
| HO2S Bank 2 Sensor 2 Heater | HO2S | Amps | varies |
| HO2S Bank 2 Sensor 2 Heater Circuit Status | HO2S | OK, Short to Gnd, Open, Short to B+, Incomplete | OK |
| Fuel Tank Rated Capacity | EVAP | Gallons/Liters | varies with vehicle option |
| Hot Open Loop | Fuel Trim, HO2S | Active/Inactive | Inactive |
| IAT Sensor | CMP Actuator, Engine, EVAP, Fuel Trim, HO2S, Ignition, Induction, Misfire, TAC | °C/°F | Varies |
| Ignition Accessory Signal | Engine, TAC | ON/OFF | OFF |
| Ignition 1 Signal | CMP Actuator, Engine, EVAP, Fuel Trim, HO2S, Ignition, Induction, Misfire, TAC | Volts | 13.0-14.2 |
| Ignition Off Time | Engine, EVAP | Hr: Min: Sec | Varies |
| Injector PWM Bank 1 | Engine, Fuel Trim, HO2S, Misfire | milliseconds | Varies |
| IMT Valve Command | Induction | ON/OFF | ON |
| IMT Valve Command | Induction | Open/Closed | open |
| IMT valve Feedback Signal | Induction | percent | 20-22% |
| IMT valve Learn Enabled | Induction | YES/NO | YES |
| IMT Valve Position | Induction | Open, Intermediate, Closed | open |
| IMT Valve Solenoid Circuit Status | Induction | OK, Short to Gnd, Open, Short to B+, Incomplete | OK |
| Knock Bank 1 Circuit Status | Ignition | OK, Fault, Incomplete | OK |
| KS Bank 2 Circuit Status | Ignition | OK, Fault, Incomplete | OK |
| Knock Detected Cylinder 1-6 | Ignition | YES/NO | NO |
| LT FT Test Avg. Bank 1 | Fuel Trim | percent | varies |
| LT FT Test Avg. Bn 1 w/o Purge | Fuel Trim | percent | varies |
| LT FT Test Avg Bank 2 | Fuel Trim | percent | varies |
| LT FT Test Avg Bn 2 w/o Purge | Fuel Trim | percent | varies |
| Injector PWM Bank 2 | Engine, Fuel Trim, HO2S, Misfire | milliseconds | varies |
| Injector 1-6 Disabled Due to Misfire | Misfire | Yes/No | No |
| Intake Manifold Pressure | Fuel Trim, Induction | kPa | varies |
| Knock Retard | Ignition | Degrees | 0 |
| KS Module Status | Ignition | OK/Fault/Incomplete | OK |
| Long Term FT Bank 1 | Eng, EVAP, Fuel Trim, HO2S | Percent | -10% to +10% |
| Long Term FT Bank 2 | Eng, EVAP, Fuel Trim, HO2S | Percent | -10% to +10% |
| Loop Status | Eng, Fuel Trim, EVAP, HO2S | Open/Closed | Closed |
| MIL Circuit History | ODD | OK/Fault/Invalid State | OK |
| MAF Sensor | Eng, EVAP, Fuel Trim, HO2S, Ignition, Induction, TAC | g/s | 3-6 (Varies with altitude) |
| MAF Sensor | EVAP, Fuel Trim, HO2S, Induction, Misfire, TAC | Hz | 1,200-3,000 (depends on altitude) |
| MAF Performance test | Fuel Trim, Induction, TAC | OK/Fault | OK |
| MAP Sensor | Eng, EGR, Fuel Trim, HO2S, Induction, Misfire, TAC | Volts | 0.4-2.0 Volts |
| MAP Performance Test 1 | Fuel Trim, Induction, TAC | OK/Fault | OK |
| MAP Performance Test 2 | Fuel Trim, Induction, TAC | OK/Fault | OK |
| MIL Circuit History | ODD | OK/Fault/Invalid State | OK |
| MAP Sensor | Eng, EVAP, Fuel Trim, HO2S, Ignition, Induction, Misfire, EGR, TAC | kPa | 20-48 kPa (Varies with altitude) |
| MIL Command | Engine, EVAP, Ignition | On/Off | Off |
| MIL Circuit Status | Engine | OK, Short to Gnd, Open, Short to B+, Incomplete | OK |
| MIL Requested by DTC | CMP Actuator, Engine, EVAP, Fuel Trim, Ignition, Induction, Misfire, TAC | YES/NO | NO |
| Misfire Current Cyl. 1-6 | Misfire | Counts | 0 |
| Misfire History Cyl. 1-6 | Misfire | Counts | 0 |
| PNP Switch (if equipped) | Engine | Park/Neutral | Park |
| Power Enrichment | Engine, Fuel Trim, HO2S, Misfire | Active/Inactive | Inactive |
| Reduced Engine Power | TAC | Active/Inactive | Inactive |
| ST FT Avg. Bank 1 | Fuel Trim | percent | varies |
| Short Term FT Bank 1 | Eng, EVAP, Fuel Trim, HO2S, | Percent | -10 to +10 |
| ST FT Avg. Bank 2 | Fuel Trim | percent | varies |
| Short Term FT Bank 2 | Eng, EVAP, Fuel Trim, HO2S, | Percent | -10 to +10 |
| Spark | Engine, Fuel Trim, HO2S, Ignition, Induction, Misfire | Degrees | 22 (varies) |
| Start Up ECT | EVAP, Fuel Trim, HO2S | °C/°F | Varies |
| Start Up IAT | EVAP, Fuel Trim, HO2S | °C/°F | Varies |
| TAC Forced Engine Shutdown | TAC | YES/NO | NO |
| TAC Motor | TAC | Enabled/Disabled | enabled |
| TAC Motor Command | TAC | percent | varies |
| Torque Management Spark Retard | Ignition | degrees | 0 |
| Torque Request Signal | TAC | Percent | 100% |
| Torque Delivered Signal | TAC | Percent | 75% |
| Total Knock Retard | Ignition | degrees | 0 |
| Total Misfire | Misfire | 1-255 | 0 |
| TP Desired Angle | TAC | Percent | Varies |
| TP Indicated Angle | Engine, EVAP, Fuel Trim, HO2S, Ignition, Induction, Misfire, TAC | Percent | % |
| TP Performance Test | Induction, TAC | OK/Fault | OK |
| TP Sensor 1 | TAC | Percent | Varies |
| TP Sensor 1 | TAC | Volts | Varies |
| TP Sensor 1 | TAC | OK/Not OK | OK |
| TP Sensor 1 Indicated Angle | TAC | percent | 0 |
| TP Sensors 1 and 2 | TAC | Agree/Disagree | Agree |
| TP Sensor 1 Learned Minimum | TAC | Volts | varies |
| TP Sensor 2 | TAC | Percent | Varies |
| TP Sensor 2 | TAC | Volts | Varies |
| TP Sensor 2 | TAC | OK/Not OK | OK |
| TP Sensor 2 Indicated Angle | TAC | percent | 0 |
| TP Sensor 2 Learned Minimum | TAC | Volts | varies |
| Vehicle Speed Sensor | Engine, EVAP, Fuel Trim, HO2S, Ignition, Induction, Misfire, TAC | mph/km/h | 0 |
| Warm-ups w/o Emission Faults | Engine | 1-10 | 0 |
| Warm-ups w/o Non-Emission Faults | Engine | 1-10 | 0 |
| Wide Open Throttle | TAC | YES/NO | NO |