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 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.
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
- EGR
-
Exhaust gas recirculation (EGR) data
- EVAP
-
Evaporative emission (EVAP) data
- FT
-
Fuel trim data
- HO2S
-
Heated Oxygen Sensor (HO2S) data
- Ign
-
Ignition System data
- I/M
-
I/M data
- Ind
-
Induction data
- Misfire
-
Misfire data
- TAC
-
Throttle Actuator Control Data
Scan Tool Data List
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Operating Conditions: Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/Accessories Off/Brake Pedal Released | |||
| 5-Volt Reference 1 | EGR, EVAP, Ign, Ind, TAC | Volts | 5.0 |
| 5-Volt Reference 1 Circuit Status | EGR, EVAP, Ign, Ind, TAC | OK/Fault | OK |
| 5-Volt Reference 2 | EGR, EVAP, Ign, Ind, TAC | Volts | 5.1 |
| 5-Volt Reference 2 Circuit Status | EGR, EVAP, Ign, Ind, TAC | OK/Fault | OK |
| Air Flow Calculated | Eng, EVAP, FT, HO2S, Ind, Misfire, TAC | g/s | 4.00-4.45 |
| Ambient Air Temperature | Eng, EVAP | °C/°F | Varies |
| APP Indicated Angle | Eng, EGR, EVAP, FT, HO2S, Ign, Ind, Misfire, TAC | % | 0 |
| APP Sensor 1 | TAC | Volts | 0.96 |
| APP Sensor 1 and 2 | TAC | Agree/Disagree | Agree |
| APP Sensor 1 Indicated Position | TAC | % | 0 |
| APP Sensor 2 | TAC | Volts | 0.43 |
| APP Sensor 2 Indicated Position | TAC | % | 0 |
| APP Sensors | TAC | % | 0 |
| BARO | Eng, EGR, EVAP, FT, HO2S, Ign, Ind, I/M | kPa | 60-104 (varies with altitude) |
| BPP Circuit Signal | TAC, I/M | Released/Applied | Released |
| BPP Signal | Eng, TAC, I/M | Released/Applied/Invalid | Released |
| Calc. TWC Temp | FT, Misfire | °C/°F | Varies |
| Catalyst Monitor Complete This Ignition | I/M | Yes/No | Varies |
| Catalyst Monitor Enabled This Ignition | I/M | Yes/No | Yes |
| Catalytic Converter Protection Active | FT, HO2S | Yes/No | No |
| CKP Active Counter | Ign | Counts | 0-255 incrementing |
| CKP Resync Counter | Ign | Counts | 0 |
| CKP Sensor | Ign | RPM | 700-750 |
| Cmmd. A/F Equivalence Ratio | Eng, FT, HO2S, Ind | :1 | 1.0 |
| CMP Active Counter | Ign | Counts | 0-255 incrementing |
| CMP Sensor | Ign, Misfire | RPM | 700-750 |
| Cold Startup | Eng, EVAP, I/M | Yes/No | Varies |
| Cycles of Misfire Data | Misfire | Counts | 0-100 incrementing |
| Cylinder 1 and 4 IC Circuit Status | Misfire | OK/Short Gnd/Open/Short to B+/Incomplete | OK |
| Cylinder 1 Injector Circuit Status | Misfire | OK/Short Gnd/Open/Short to B+/Incomplete | OK |
| Cylinder 2 and 5 IC Circuit Status | Misfire | OK/Short Gnd/Open/Short to B+/Incomplete | OK |
| Cylinder 2 Injector Circuit Status | Misfire | OK/Short Gnd/Open/Short to B+/Incomplete | OK |
| Cylinder 3 and 6 IC Circuit Status | Misfire | OK/Short Gnd/Open/Short to B+/Incomplete | OK |
| Cylinder 3 Injector Circuit Status | Misfire | OK/Short Gnd/Open/Short to B+/Incomplete | OK |
| Cylinder 4 Injector Circuit Status | Misfire | OK/Short Gnd/Open/Short to B+/Incomplete | OK |
| Cylinder 5 Injector Circuit Status | Misfire | OK/Short Gnd/Open/Short to B+/Incomplete | OK |
| Cylinder 6 Injector Circuit Status | Misfire | OK/Short Gnd/Open/Short to B+/Incomplete | OK |
| Decel. Fuel Cutoff | Eng, EGR, FT, HO2S | Active/Inactive | Inactive |
| Desired EGR Position | EGR | % | 0 |
| Desired Idle Speed | Eng, EVAP, Ind, TAC | RPM | 720 |
| Distance Since DTC Cleared | Eng | km/miles | Varies |
| EC Ignition Relay Command | Eng/TAC | On/Off | On |
| EC Ignition Relay Feedback Signal | Eng, TAC | Volts | 12-14.5 |
| ECT Sensor | Eng, EGR, EVAP, FT, HO2S, Ign, Ind, Misfire, TAC, I/M | °C/°F | 99/210 |
| EGR Flow Test Count | EGR | Counts | 0 |
| EGR Learned Minimum Position | EGR | % | Varies |
| EGR Monitor Complete This Ignition | I/M | Yes/No | Varies |
| EGR Monitor Enabled This Ignition | I/M | Yes/No | Yes |
| EGR Position Sensor | Eng, EGR, Misfire | % | 0 |
| EGR Position Sensor | EGR | Volts | 0.71 |
| EGR Position Variance | EGR | % | -100 |
| EGR Solenoid Command | EGR | % | 0 |
| Engine Load | Eng, EGR, EVAP, FT, HO2S, Ign, Ind, Misfire, TAC | % | Varies |
| Engine Run Time | Eng, EGR, EVAP, FT, HO2S, Ign, I/M, Ind, Misfire, TAC | Hr:Min:Sec | Varies |
| Engine Speed | Eng, EGR, EVAP, FT, HO2S, Ign, Ind, Misfire, TAC | RPM | 700-750 |
| EVAP Fault History | EVAP | No Fault/Excess Vacuum/Purge Valve Leak/Small Leak/Weak Vacuum/No Test Result | No Fault |
| EVAP Monitor Complete This Ignition | I/M | Yes/No | Varies |
| EVAP Monitor Enabled This Ignition | I/M | Yes/No | No |
| EVAP Purge Solenoid Circuit Status | EVAP | OK/Short Gnd/Open/Short to B+/Incomplete | OK |
| EVAP Purge Solenoid Command | Eng, EVAP, FT, HO2S | % | 10-15 |
| EVAP Vent Solenoid Command | Eng, EVAP | Venting/Not Venting | Venting |
| Fuel Level Sensor | EVAP | Volts | Varies |
| Fuel Pump Relay Command | Eng | On/Off | On |
| Fuel Tank Level Remaining | Eng, EVAP, FT, Misfire, I/M | % | Varies |
| Fuel Tank Pressure Sensor | Eng, EVAP | mm Hg/in H2O | -19.8 to +12.52/-10.5 to +6.17 |
| Fuel Tank Pressure Sensor | EVAP | Volts | 0.2-4.0 |
| Fuel Tank Rated Capacity | EVAP | Liters/Gallons | 75.6/20.0 |
| Fuel Trim Cell | Eng, FT | Cell | 0 |
| Fuel Trim Learn | FT | Enabled/Disabled | Enabled |
| Fuel Trim System Test State | FT | Disabled/Monitoring/Run Purge Test/Report | Monitoring |
| Fuel Volatility | EVAP, FT | Low/Moderate/High | Varies |
| HO2S 1 | Eng, EVAP, FT, HO2S, Ind | mV | 0-1,000 |
| HO2S 2 | Eng, FT, HO2S | mV | 50-850 |
| HO2S 1 Heater Command | HO2S | % | 10-40 |
| HO2S 1 Heater Command | HO2S | On/Off | On |
| HO2S 2 Heater Command | HO2S | % | 30-80 |
| HO2S 2 Heater Command | HO2S | On/Off | On |
| HO2S 1 Heater | HO2S | amps | 0.50-1.00 |
| HO2S 1 Heater Circuit Status | HO2S | OK/Short Gnd/Open/Short to B+/Incomplete | OK |
| HO2S 2 Heater | HO2S | amps | 0.50-1.00 |
| HO2S 2 Heater Circuit Status | HO2S | OK/Short Gnd/Open/Short to B+/Incomplete | OK |
| HO2S Heater Monitor Complete This Ignition | I/M | Yes/No | Varies |
| HO2S Heater Monitor Enabled This Ignition | I/M | Yes/No | Varies |
| HO2S/O2S Monitor Complete This Ignition | I/M | Yes/No | Varies |
| HO2S/O2S Monitor Enabled This Ignition | I/M | Yes/No | Varies |
| HOT Open Loop | FT, HO2S | Active/Inactive | Inactive |
| IAT Sensor | Eng, EGR, EVAP, FT, HO2S, Ign, I/M, Ind, Misfire, TAC | °C/°F | Varies |
| Ignition 1 Signal | Eng, EGR, EVAP, FT, HO2S, Ign, I/M, Ind, Misfire, TAC | Volts | 12-14.5 |
| Ignition Accessory Signal | Eng, TAC | On/Off | Off |
| Ignition Off Time | Eng, EVAP, I/M | min | Varies |
| Inj. 1 Disabled Due to Misfire | Misfire | Yes/No | No |
| Inj. 2 Disabled Due to Misfire | Misfire | Yes/No | No |
| Inj. 3 Disabled Due to Misfire | Misfire | Yes/No | No |
| Inj. 4 Disabled Due to Misfire | Misfire | Yes/No | No |
| Inj. 5 Disabled Due to Misfire | Misfire | Yes/No | No |
| Inj. 6 Disabled Due to Misfire | Misfire | Yes/No | No |
| Injector PWM | Eng, FT, HO2S, Misfire | ms | 1.85-2.05 |
| Intake Manifold Pressure | Eng, FT, Ind | kPa | Varies |
| Knock Detected Cyl. 1 | Ign | Yes/No | No |
| Knock Detected Cyl. 2 | Ign | Yes/No | No |
| Knock Detected Cyl. 3 | Ign | Yes/No | No |
| Knock Detected Cyl. 4 | Ign | Yes/No | No |
| Knock Detected Cyl. 5 | Ign | Yes/No | No |
| Knock Detected Cyl. 6 | Ign | Yes/No | No |
| Knock Retard | EGR, Ign | degrees | 0 |
| Long Term FT | Eng, EVAP, FT, HO2S | % | 0 |
| Loop Status | Eng, EVAP, FT, HO2S | Open/Closed | Closed |
| LT FT Test Avg. | FT | % | 0.88 |
| LT FT Test Avg. w/o purge | FT | % | 0.88 |
| MAF Performance Test | Ft, Ind, TAC | OK/Fault | OK |
| MAF Sensor | Eng, EGR, EVAP, FT, HO2S, Ign, Ind, Misfire, TAC | g/s | 3-6 (varies with altitude) |
| MAF Sensor | Ind | Hz | 1,200-1,300 (varies with altitude) |
| MAP Performance Test 1 | FT, Ind, TAC | OK/Fault | OK |
| MAP Performance Test 2 | FT, Ind, TAC | OK/Fault | OK |
| MAP Sensor | Eng, EGR, EVAP, FT, HO2S, Ign, Ind, Misfire, TAC | kPa | 20-48 (varies with altitude) |
| MIL Command | Eng, I/M | On/Off | Off |
| MIL Requested by DTC | Eng, EGR, EVAP, FT, HO2S, Ign, I/M, Ind, Misfire, TAC | Yes/No | No |
| Misfire Current Cyl. 1 | Misfire | Counts | 0 |
| Misfire Current Cyl. 2 | Misfire | Counts | 0 |
| Misfire Current Cyl. 3 | Misfire | Counts | 0 |
| Misfire Current Cyl. 4 | Misfire | Counts | 0 |
| Misfire Current Cyl. 5 | Misfire | Counts | 0 |
| Misfire Current Cyl. 6 | Misfire | Counts | 0 |
| Misfire History Cyl. 1 | Misfire | Counts | 0 |
| Misfire History Cyl. 2 | Misfire | Counts | 0 |
| Misfire History Cyl. 3 | Misfire | Counts | 0 |
| Misfire History Cyl. 4 | Misfire | Counts | 0 |
| Misfire History Cyl. 5 | Misfire | Counts | 0 |
| Misfire History Cyl. 6 | Misfire | Counts | 0 |
| Power Enrichment | Eng, FT, HO2S, Misfire | Active/Inactive | Inactive |
| Reduced Engine Power | TAC | Active/Inactive | Inactive |
| Short Term FT | Eng, EVAP, FT, HO2S | % | 0 |
| Spark | Eng, FT, HO2S, Ign, Ind, Misfire | degrees | 18-24 |
| ST FT Test Avg. | FT | % | 0.98-1.00 |
| Start-up ECT | EVAP, HO2S, I/M | °C/°F | Varies |
| Start-up IAT | EVAP, HO2S, I/M | °C/°F | Varies |
| TAC Forced Engine Shutdown | TAC | Yes/No | No |
| TAC Motor | TAC | Enabled/Disabled | Enabled |
| TAC Motor Command | TAC | % | 15-25 |
| Torque Management Spark Retard | Ign | degrees | 0 |
| Total Knock Retard | EGR, Ign | degrees | 0 |
| Total Misfire | Misfire | Counts | 0 |
| TP Desired Angle | TAC | % | 6 |
| TP Indicated Angle | Eng, EGR, EVAP, FT, HO2S, Ign, Ind, Misfire, TAC | % | 6 |
| TP Performance Test | FT, Ind, TAC | OK/Fault | OK |
| TP Sensor 1 | TAC | Volts | 4.06 |
| TP Sensor 1 Indicated Position | TAC | % | 6 |
| TP Sensor 1 Learned Minimum | TAC | % | 13 |
| TP Sensor 2 | TAC | Volts | 0.90 |
| TP Sensor 2 Indicated Position | TAC | % | 6 |
| TP Sensor 2 Learned Minimum | TAC | % | 13 |
| TP Sensors 1 and 2 | TAC | Agree/Disagree | Agree |
| Vehicle Speed Sensor | Eng, EGR, EVAP, FT, HO2S, Ign, I/M, Ind, Misfire, TAC | km/h/mph | 0 |
| Warm-ups Since DTC Cleared | Eng | Counts | Varies |
| Warm-ups w/o Emission Faults | Eng | Counts | Varies |
| Warm-ups w/o Non-Emission Faults | Eng | Counts | Varies |
| Wide Open Throttle | TAC | Yes/No | No |