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 System Check - Vehicle is completed.
- No diagnostic trouble codes (DTCs)
- On-board diagnostics are functioning properly.
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 normal running engine at idle.
IMPORTANT:
A scan tool that displays faulty data should not be used. The scan tool problem 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 information 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:
- All
-
The Parameter is in all of the data lists indicated below.
- CD
-
Cylinder Deactivation Data List
- EE
-
Enhanced Evaporative Emission (EVAP) Data List
- Eng
-
Engine Data List
- FT
-
Fuel Trim Data List
- HO2S
-
Heated Oxygen Sensor (HO2S) Data List
- Ign
-
Ignition System Data List
- MF
-
Misfire Data List
- OD
-
Output Driver Data List
- TAC
-
Throttle Actuator Control (TAC) Data List
Scan Tool Data List
| Scan Tool Parameter | Data List | Parameter Range/Units | Typical Data Values |
|---|---|---|---|
| Engine Idling/Radiator Hose Hot/Closed Throttle/Park/Closed Loop/Accessories OFF | |||
| 5-Volt Reference 1 Circuit | EE, Eng, Ign, TAC | OK/Fault | OK |
| 5-Volt Reference 2 Circuit | EE, Eng, Ign, TAC | OK/Fault | OK |
| 5-Volt Reference 1 | EE, Eng, Ign, TAC | Volts | 4.5 V |
| 5-Volt Reference 2 | EE, Eng, Ign, TAC | Volts | 4.5 V |
| A/C Relay Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| A/C Relay Command | Eng, MF, TAC | On/Off | Varies |
| Air Flow Calculated | EE, Eng, FT, HO2S, MF, TAC | Grams Per Seconds (g/s) | 1-9 g/s @ idle |
| Air Fuel Ratio | Eng, FT, HO2S | X:1 | 14.7:1 |
| Ambient Air Temperature | Eng | °C/°F | Varies |
| APP Indicated Angle | CD, EE, Eng, FT, HO2S, Ign, MF, TAC | 0-100% | 0 |
| APP Sensor 1 | TAC | 0-5.0 Volts | 0.4-1.0 Volt |
| APP Sensor 2 | TAC | 5.0-0 Volts | 4.5-4.1 Volts |
| APP Sensor 1 | TAC | 0-100% | 0% |
| APP Sensor 2 | TAC | 0-100% | 0% |
| APP Sensor 1 and 2 | TAC | Agree/Disagree | Agree |
| APP Sensor 1 Indicated Position | TAC | % | 0% |
| APP Sensor 2 Indicated Position | TAC | % | - |
| APP Sensors | TAC | % | 0% |
| BARO | CD, EE, Eng, FT, HO2S, Ign | kPa | 50-104 kPa/ Varies w/Altitude |
| BPP Circuit Signal | TAC | Applied/Released | - |
| Brake Booster Pressure | CD, Eng | kPa/in Hg | 54-81 kPa (16-24 in Hg) |
| Brake Booster Pressure | CD | Volts | 8.9-3.4 V |
| Calculated TWC Temp Bank 1 | FT, MF | Degrees C/F | 315-427°C (600-800°F) |
| Calculated TWC Temp Bank 2 | FT, MF | Degrees C/F | 315-427°C (600-800°F) |
| Catalytic Converter Protection Active | CD, FT, HO2S | Yes/No | No |
| CKP Active Counter | Ign | 0-250 Counts | Varies |
| CKP Resync Counter | Ign | Counts | 0 |
| CKP Sensor | Eng, Ign | RPM | 500-700 RPM |
| CMP Active Counter | Ign | 0-250 Counts | Varies |
| CMP Sensor | Eng, Ign, MF | RPM | 1,000-1,400 RPM |
| Cold Start-Up | Eng, EE | Yes/No | Varies |
| Cruise Control Active | Eng, TAC | Active/Inactive | Inactive |
| Cycles of Misfire Data | MF | 0-100 Counts | Varies |
| Cylinder 1-8 IC Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK |
| Cylinder 1-8 Injector Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK |
| Cyl Deactivation Cycles | CD | Counts | Varies |
| Cyl Deact Performance Test | CD, FT | OK/Fault | OK |
| Cyl Deact System Command | CD | V4/V8 | V8 |
| Cyl 1 Deact Sol Command | CD | Cyl On/Cyl Off | Cyl Off |
| Cyl 4 Deact Sol Command | CD | Cyl On/Cyl Off | Cyl Off |
| Cyl 6 Deact Sol Command | CD | Cyl On/Cyl Off | Cyl Off |
| Cyl 7 Deact Sol Command | CD | Cyl On/Cyl Off | Cyl Off |
| Cyl 1 Deact Sol CKT Status | CD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| Cyl 4 Deact Sol CKT Status | CD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| Cyl 6 Deact Sol CKT Status | CD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| Cyl 7 Deact Sol CKT Status | CD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| Deact Inhibit APP High | CD | Yes/No | No |
| Deact Inhibit APP Rate High | CD | Yes/No | No |
| Deact Inhibit Axle Torque Limiting | CD | Yes/No | No |
| Deact Inhibit Brake Booster Pressure Sensor DTC | CD | Yes/No | No |
| Deact Inhibit Cyl Deactivation Solenoid DTC | CD | Yes/No | No |
| Deact Inhibit DCC Override | CD | Yes/No | No |
| Deact Inhibit ECT Low | CD | Yes/No | No |
| Deact Inhibit ECT Sensor DTC | CD | Yes/No | No |
| Deact Inhibit Eng Oil Temperature | CD | Yes/No | No |
| Deact Inhibit Eng Overtemperature Protection | CD | Yes/No | No |
| Deact Inhibit Eng RPM | CD | Yes/No | No |
| Deact Inhibit EOP | CD | Yes/No | Yes |
| Deact Inhibit EOP Sensor DTC | CD | Yes/No | No |
| Deact Inhibit Hot Coolant Mode | CD | Yes/No | No |
| Deact Inhibit Ignition Voltage | CD | Yes/No | No |
| Deact Inhibit Low Brake Booster Vac | CD | Yes/No | No |
| Deact Inhibit Manifold Vacuum Low | CD | Yes/No | Yes |
| Deact Inhibit MAP Sensor DTC | CD | Yes/No | No |
| Deact Inhibit Maximum Deactivation Time Exceeded | CD | Yes/No | No |
| Deact Inhibit Minimum Time On All Cylinders | CD | Yes/No | No |
| Deact Inhibit Oil Aeration | CD | Yes/No | No |
| Deact Inhibit Piston Protection | CD | Yes/No | No |
| Deact Inhibit TAC System DTC | CD | Yes/No | No |
| Deact Inhibit Torque Reduction | CD | Yes/No | No |
| Deact Inhibit Trans Gear | CD | Yes/No | No |
| Deact Inhibit Trans Range | CD | Yes/No | No |
| Deact Inhibit Trans Shifting | CD | Yes/No | No |
| Deact Inhibit TWC Overtemperature Protection | CD | Yes/No | No |
| Deact Inhibit VSS DTC | CD | Yes/No | No |
| Deact Inhibit VSS Low w/TCC On | CD | Yes/No | No |
| Decel Fuel Cutoff | CD, Eng, FT, HO2S | Active/Inactive | Inactive |
| Desired Idle Speed | EE, Eng, TAC | RPM | ECM Controlled |
| Distance Since DTC Cleared | Eng | km/miles | Varies |
| Distance with Cyl Activated | CD | km/miles | Varies |
| Distance with Cyl Deactivated | CD | km/miles | Varies |
| EC Ignition Relay Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| EC Ignition Relay Command | Eng, TAC | On/Off | On |
| EC Ignition Relay Feedback | Eng, TAC | Volts | 2.25-2.95 Volts |
| ECM Reset | CD, EE, Eng, Ign | Yes/No | No |
| ECT Sensor | All | -39 to +140°C (-38 to +284°F) | 88-105°C (190-221°F) |
| Engine Load | All | 0-100% | 18% @ Idle 21% @ 2500 RPM |
| Engine Off EVAP Test Connections Met | EE | Yes/No | Yes |
| Engine Oil Level Switch | CD | OK/Low | OK |
| Engine Oil Life Remaining | CD | 0-100% | Varies |
| Engine Oil Pressure Sensor | CD, Eng, MF | kPa/psi | 290-330 kPa (42-88 psi) |
| Engine Oil Pressure Switch | CD | OK/Low | OK |
| Engine Oil Temperature | CD | Degrees C/F | 85-105°C (185-220°F) |
| Engine Run Time | All | Hrs, Min, Sec | Varies |
| Engine Speed | All | 0-10,000 RPM | 500-700 RPM |
| Engine Speed Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK |
| EVAP Purge Solenoid Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| EVAP Purge Solenoid Command | EE, Eng, FT, HO2S | 0-100% | 10-25% |
| EVAP Vent Solenoid Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| EVAP Vent Solenoid Command | EE, Eng, FT | Not Venting/Venting | Venting |
| FC Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| Fuel Level Sensor | EE | 0-5 Volts | 0.7-2.5 Volts |
| Fuel Pump Relay Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| Fuel Pump Relay Command | Eng, FT | On/Off | ON |
| Fuel Tank Level Remaining | Eng, MF | 0-100% | Varies |
| Fuel Tank Pressure Sensor | EE, Eng | -32.7 to +14.0 mm/Hg (-17.5 to +7.5 in/H2O) | Varies |
| Fuel Tank Pressure Sensor | EE, Eng | 0-5.0 Volts | Varies |
| Fuel Tank Rated Capacity | EE | 98 Liters (25.9 Gallons) or 96.2 Liters (25 Gallons) | Varies with Fuel Tank Option |
| Fuel Trim Cell | EE, Eng, FT | 0-23 | 19 |
| Fuel Trim Learn | EE, Eng, FT | Enabled/Disabled | Enabled, May Toggle |
| Fuel Volatility | EE, FT, HO2S | Low/Moderate/High | Varies |
| HO2S Bank 1 Sensor 1 | EE, Eng, FT, HO2S | Millivolts | 10-1,000 mV and Varying |
| HO2S Bank 1 Sensor 2 | Eng, FT, HO2S | Millivolts | 10-1,000 mV and Varying |
| HO2S Bank 2 Sensor 1 | EE, Eng, FT, HO2S | Millivolts | 10-1,000 mV and Varying |
| HO2S Bank 2 Sensor 2 | Eng, FT, HO2S | Millivolts | 10-1,000 mV and Varying |
| HO2S BN 1 Sensor 1 Heater | HO2S | Amps | 0.7-0.9 Amps |
| HO2S BN 1 Sensor 2 Heater | HO2S | Amps | 0.4-0.6 Amps |
| HO2S BN 2 Sensor 1 Heater | HO2S | Amps | 0.7-0.9 Amps |
| HO2S BN 2 Sensor 2 Heater | HO2S | Amps | 0.4-0.6 Amps |
| HO2S BNK 1 Sen 1 Heater Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| HO2S BNK 1 Sen 2 Heater Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| HO2S BNK 2 Sen 1 Heater Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| HO2S BNK 2 Sen 2 Heater Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| HO2S Bnk 1 Sensor 1 Heater Command | HO2S | On/Off | ON |
| HO2S Bnk 1 Sensor 1 Heater Command | HO2S | % | 100% |
| HO2S Bnk 1 Sensor 2 Heater Command | HO2S | On/Off | ON |
| HO2S Bnk 1 Sensor 2 Heater Command | HO2S | % | 100% |
| HO2S Bnk 2 Sensor 1 Heater Command | HO2S | On/Off | ON |
| HO2S Bnk 2 Sensor 1 Heater Command | HO2S | % | 100% |
| HO2S Bnk 2 Sensor 2 Heater Command | HO2S | On/Off | ON |
| HO2S Bnk 2 Sensor 2 Heater Command | HO2S | % | 100% |
| Hot Open Loop | CD, FT, HO2S | Active/Inactive | Inactive |
| IAT Sensor | All | -39 to +140°C (-38 to +284°F) | 35°C (91°F) Depends on Ambient Temperature |
| Ignition Accessory Signal | Eng, TAC | On/Off | ON |
| Ignition 1 Signal | All | 0-25 Volts | 11.5-14.5 Volts |
| Inj. PWM Bank 1 Average | Eng, FT, HO2S | Milliseconds | 2-6 |
| Inj. PWM Bank 2 Average | Eng, FT, HO2S | Milliseconds | 2-6 |
| Knock Retard | Ign | 0.0-16° | 0° |
| KS Active Counter | Ign | Counts | Varies |
| KS Bank 1 Circuit Status | Ign | OK/Fault/Incomplete | OK/Incomplete |
| KS Bank 2 Circuit Status | Ign | OK/Fault/Incomplete | OK/Incomplete |
| KS Module Status | Ign | OK/Fault/Incomplete | OK/Incomplete |
| Long Term FT Bank 1 | EE, Eng, FT, HO2S | Percentage | Near 0% |
| Long Term FT Bank 2 | EE, Eng, FT, HO2S | Percentage | Near 0% |
| Loop Status | EE, Eng, FT, HO2S | Open/Closed | Closed |
| MAF Sensor | CD, EE, Eng, FT, HO2S, Ign, MF, TAC, | Grams Per Seconds (g/s) | 1-9 g/s @ Idle, Depends on Altitude 15-26 g/s @ 2,500 RPM, Depends on Altitude |
| MAF Sensor | EE, Eng, FT, HO2S, MF | 0-31,999 Hz | 1,150-1,350 Hz |
| MAP Sensor | CD, EE, Eng, FT, HO2S, Ign, MF, TAC, | kPa | 20-48 kPa |
| MAP Sensor | CD, Eng, FT, HO2S, MF, TAC | Volts | 1.0-2.0 Volts Varies with Altitude |
| MIL Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| MIL Command | EE, Eng, Ign | Off/On | Off |
| MIL Requested by DTC | CD, EE, Eng, Ign | Yes/No | No |
| Misfire Current Cyl. 1-8 | MF | 0-200 Counts | 0 |
| Misfire History Cyl. 1-8 | MF | 0-65,535 Counts | 0 |
| PNP Switch | CD, Eng | P/N Yes/No in gear |
P/N |
| Power Enrichment | Eng, FT, HO2S, MF | Active/Inactive | Inactive |
| Reduced Engine Power | CD, TAC | Active/Inactive | Inactive |
| Short Term FT Bank 1 | EE, Eng, FT, HO2S | Percentage | Near 0% |
| Short Term FT Bank 2 | EE, Eng, FT, HO2S | Percentage | Near 0% |
| Spark | Eng, FT, HO2S, Ign, MF | Degrees | 10-17° |
| Starter Relay Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| Start-Up ECT | EE, FT | °C/°F | Varies |
| Start-Up IAT | EE, HO2S | °C/°F | Varies |
| TAC Forced Engine Shutdown | TAC | Yes/No | No |
| TAC Motor | TAC | Enabled/Disabled | Enabled |
| TAC Motor Command | TAC | 0-100% | 15-35% |
| TCC/Cruise Brake Pedal | Eng | Applied/Released/Invalid | Released |
| TCC/Cruise Brake Pedal Switch | TAC | Applied/Released/Invalid | Released |
| TCS Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| TCS Torque Request Signal | CD, TAC | 0-100% | 100% |
| Torque Delivered Signal | TAC | 0-100% | 5-15% |
| Torque Management Spark Retard | Ign | Degrees | 0° |
| Total Knock Retard | Ign | Degrees | 0° |
| Total Misfire | MF | Counts | Varies |
| TP Desired Angle | TAC | 0-100% | 5.5% |
| TP Indicated Angle | CD, EE, Eng, FT, HO2S, Ign, MF, TAC | 0-100% | 5.5% |
| TP Sensor 1 | TAC | 0-5.0 Volts | 4.1-4.95 Volts |
| TP Sensor 1 | TAC | 0-100% | Varies near 5% |
| TP Sensor 2 | TAC | 5.0-0 Volts | 0.4-0.85 V |
| TP Sensor 2 | TAC | 100-0% | Varies near 5% |
| TP Sensors 1 and 2 | TAC | Agree/Disagree | Agree |
| TP Sensor 1 Indicated Position | TAC | % | 5% |
| TP Sensor 2 Indicated Position | TAC | % | 5% |
| TWC Temperature Calculated | FT, MF | Degrees C/F | -570°C (1,075°F) |
| Vacuum Calculated | CD, EE, Eng, FT, HO2S | kPa/in Hg | 59 kPa/16 in Hg |
| Vehicle Speed Circuit Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| Vehicle Speed Circuit 2 Status | OD | OK, Incomplete, Short B+, Short Gnd/Open | OK/Incomplete |
| Vehicle Speed Sensor | CD, EE, Eng, FT, HO2S, Ign, MF, TAC | km/h mph |
0 |
| Warm-Ups w/o Emission Faults | Eng | 0-255 Counts | Varies |
| Warm-Ups w/o Non-Emission Faults | Eng | 0-255 Counts | Varies |
| Warm-Ups Since DTC Cleared | Eng | Counts | Varies |
| Wide Open Throttle | TAC | Yes/No | No |