For 1990-2009 cars

The Engine Scan Tool Data List contains all engine related parameters that are available on the scan tool. A 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 conditions are determined:

• | The Diagnostic System Check - Vehicle is completed.

• | There are no diagnostic trouble codes (DTCs).

• | The 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 the values that would be seen on a normal running engine.

Important: Do not use a scan tool that displays faulty data. The scan tool concern should be reported to the manufacturer. Use of a faulty scan tool can result in misdiagnosis and in 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 is located on the scan tool. Review the scan tool operating manual for the exact locations of the data lists. The following is a description of each term listed:

CMP: CMP Actuator Data List
Eng: Engine Data List
EVAP: EVAP Data List
FT: Fuel Trim Data List
HO2S: HO2S Data List
Ign: Ignition Data List
MF: Misfire Data List
TAC: TAC Data List
IND: Intake Data List
TRANS: Transmission Data List

Scan Tool Parameter | Data List | Parameter Range/Units | Typical Data Values
--- | --- | --- | ---
Operating Conditions: Engine Idling/Radiator Hose Hot/Park or Neutral/Closed Loop/Accessories OFF
5-Volt Reference 1 or 2 | EVAP, IGN, IND, TAC | V | 4.5
5-Volt Reference 1 or 2 Circuit Status | EVAP, IGN, IND, TAC | OK/Fault | OK
A/C Relay Command | Eng, IND, MF, TAC | On/Off | Off
Calculated Air Flow | ENG, EVAP, FT, HO2S, IND, MF, TAC | g/s | --
Ambient Air Temperature | ENG, EVAP | °C/°F | Varies
APP Indicated Angle | ALL | 0-100% | 0.0
APP Sensors | TAC | V | 0.0
APP Sensor 1 | TAC | 0.9-4.5 V | 0.92 V
Indicated APP sensor 1 Position | TAC | % | 0.0
APP Sensor 2 | TAC | 0.42-2.25 V | 0.43 V
Indicated APP Sensor 2 Position | TAC | % | 0.0
APP Sensor 1 and 2 | TAC | Agree/Disagree | Agree
BARO | Eng, EVAP, FT, HO2S, Ign, IND, TRANS | kPa (psi) | Varies with altitude
BPP Circuit Signal | TAC | Applied/Released | Released
BPP Signal | ENG, TAC, TRANS | Applied/Released/Invalid | Released
Calculated TWC Temperature Bank 1 or Bank 2 | FT, MF | °C/°F | Varies
Catalytic Converter Protection Active | FT, HO2S | Yes/No | No
CKP Active Counter | IGN | Counts | Increase
CKP Resync Counter | IGN | Counts | Varies
CKP Sensor | IGN | RPM | Engine Idle Speed
Commanded Air Fuel and Equivalent Ratio | ENG, FT, HO2S, IND | Ratio | 14.7:1
CMP Sensor | CMP, IGN, MF | RPM | Engine Idle Speed
Cold Start Up | ENG, EVAP | Yes/No | Varies
Cruise Control Active | ENG, TAC | Yes/No | No
Cycles of Misfire Data | MF | 0-99 | Increase
Cylinder 1-8 Ignition Control Circuit Status | MF | OK/Incomplete/Short to B+/Short to Ground/Open | OK
Cylinder 1-8 Injector Circuit Status | MF | OK/Incomplete/Short to B+/Short to Ground/Open | OK
Decel. Fuel Cutoff | Eng, FT, HO2S | Active/Inactive | Inactive
Desired Exhaust CMP Bank 1 or Bank 2 | CMP | Degrees | Varies
Desired Idle Speed | ENG, CMP, EVAP, IND, TAC | 0-7,000 RPM | 650 RPM
Desired Intake CMP Bank 1 or Bank 2 | CMP | Degrees | Varies
Mileage Since DTCs Cleared | ENG | Mi/Km | Varies
EC Ignition Relay Circuit Status | TAC | OK/Incomplete/Short to B+/Short to Ground/Open | OK
EC Ignition Relay Command | ENG, TAC | On/Off | On
EC Ignition Relay Feedback Signal | ENG, TAC | V | 13.5 V
ECT Sensor | ALL | °C/°F | Varies
Engine Load | ALL | 0-99% | 2%
Engine Off Time | EVAP | 0.00:00 | Varies
Engine Oil Level Switch | Eng, CMP | OK/Low | OK
Engine Oil Life Remaining | CMP | % | Varies
Engine Oil Pressure Sensor | ENG, CMP, MF | kPa/psi | Varies
Calculated Engine OIl Temperature | CMP | °C/°F | Varies
Engine Running Time | ALL | 0:00:00 | Varies
Engine Speed | ALL | RPM | 650 RPM
EVAP Fault History | EVAP | Vacuum/Purge Valve Leaks/Small Leak/Weak Vacuum/No Test Result | Vacuum
EVAP Purge Solenoid Command | Eng, EVAP, FT, HO2S | 0-100% | Varies
EVAP Purge Solenoid Circuit Status | EVAP | Incomplete/Fault/OK | Incomplete
EVAP Vent Solenoid Command | Eng, EVAP | Venting/Not Venting | Not Venting
EVAP Vent Solenoid Circuit Status | EVAP | Incomplete/Fault/OK | Incomplete
Exhaust CMP Angle Bank 1 or Bank 2 | CMP | Degrees | Varies
Exhaust CMP Bank 1 or Bank 2 Active Counter | CMP, IGN | Counts | Varies
Exhaust CMP Bank 1 or Bank 2 Command | CMP | % | Varies
Exhaust CMP Bank 1 or Bank 2 Variance | CMP | Degrees | Varies
Exhaust CMP Solenoid Bank 1 or Bank 2 Circuit Status | CMP | OK/Incomplete/Short to B+/Short to Ground/Open | OK
Extended Travel BPP Signal | TAC | Applied/Released/Invalid | Released
Fuel Level Sensor Left Tank | EVAP | 0-5 V | Varies
Fuel Level Sensor Right Tank | EVAP | 0-5 Volts | Varies
Fuel Pump Relay Circuit Status | ENG | Incomplete/Fault/OK | OK
Fuel Pump Relay Command | ENG | On/Off | On
Fuel Tank Level Remaining | ENG, EVAP , FT, MF | % | Varies
Fuel Tank Pressure Sensor | EVAP | V | Varies
Fuel Tank Pressure Sensor | ENG, EVAP | in H2O/mm Hg | Varies
Fuel Tank Rated Capacity | EVAP | Liters/Gal | Varies
Fuel Trim Cell | ENG, FT | Varies | 2
Fuel Trim Learn | FT | Enabled/Disabled | Enabled
Fuel Trim System Test State | FT | Disabled/Enabled/Run PUrge/Test/Monitoring | Varies
Fuel Volatility | EVAP, FT | Low/Medium/High | Varies
HO2S Bank 1 or Bank 2 Sensor 1 | Eng, EVAP, FT, HO2S, IND | mV | 80-850 mV
HO2S Bank 1 or Bank 2 Sensor 2 | ENG, FT, HO2S | mV | 400-800 mV
HO2S Heater Bank 1 or Bank 2 Sensor 1 | HO2S | A | Varies
HO2S Heater Bank 1 or Bank 2 Sensor 2 | HO2S | A | Varies
HO2S Heater Bank 1 or Bank 2 Sensor 1 Command | HO2S | % | Varies
HO2S Heater Bank 1 or Bank 2 Sensor 1 Command | HO2S | On/Off | On
HO2S Heater Bank 1 or Bank 2 Sensor 2 Command | HO2S | % | Varies
HO2S Heater Bank 1 or Bank 2 Sensor 2 Command | HO2S | On/Off | On
HO2S Heater Bank 1 or Bank 2 Sensor 1 Circuit Status | HO2S | OK/Incomplete/Short to B+/Short to Ground/Open | OK
HO2S Heater Bank 1 or Bank 2 Sensor 2 Circuit Status | HO2S | OK/Incomplete/Short to B+/Short to Ground/Open | OK
Hot Open Loop | HO2S, FT | Active/Inactive | Inactive
Intake Air Temperatuer Sensor | ALL | °C/°F | Varies
Ignition Accessory Signal | ENG, TAC | On/Off | On
Ignition Off Time | ENG, EVAP | 0:00:00 | Varies
Ignition 1 Signal | ALL | 0-25.5 Volts | 12.8-14.2 V
Injector PWM Bank 1 or Bank 2 | ENG, FT, HO2S, MF | 0-9 ms | 3.0-5.4 ms
Injector 1-8 Disabled Due to Misfire | MF | Yes/No | No
Intake CMP Angle Bank 1 or Bank 2 | CMP | Degrees | Varies
Intake CMP Bank 1 or Bank 2 Active Counter | CMP, IGN | Counts | Varies
Intake CMP Bank 1 or Bank 2 Command | CMP | % | Varies
Intake CMP Bank 1 or Bank 2 Variance | CMP | Degrees | Varies
Intake CMP Solenoid Bank 1 or Bank 2 Circuit Status | CMP | OK/Incomplete/Short to B+/Short to Ground/Open | OK
Intake Manifold Pressure | ENG, FT, IND | kPa | Varies
Knock Detected Cyl. 1-8 | IGN | Yes/No | No
Knock Retard | IGN | 0-191 Degrees | 0
Long Term FT Bank 1 or Bank. 2 | ENG, EVAP, FT, HO2S | -100 to +100% | 7-9%
Long Term FT Test Avg Bank 1 or Bank 2 | FT | % | 1%
Long Term FT Avg Bank 1 or Bank 2 w/o purge | FT | % | 1%
Loop Status | ENG, EVAP, FT, HO2S | Open/Closed | Closed
MAF Performance Test | FT, TAC, IND | OK/Fault | OK
MAF Sensor | ALL | 0-655 g/s | 3-7 g/s
MAF Sensor | IND | 0-9999 Hz | 28 Hz
MAP Performance Test 1 | FT, IND, TAC | OK/Fault | OK
MAP Performance Test 2 | FT, IND, TAC | OK/Fault | OK
MAP Sensor | ALL | kPa (psi) | 30 kPa (4.6 psi)
MAP Sensor | IND | V | 1.06 V
MIL Circuit Status | ENG | OK/Incomplete/Short to B+/Short to Ground | OK/Incomplete
MIL Command | ENG | On/Off | Off
MIL Requested by DTC | ALL | Yes/No | No
Misfire Current Cyl. 1-8 | MF | 0-255 Counts | 0
Misfire History Cyl. 1-8 | MF | 0-255 Counts | 0
Output Speed Sensor | TRANS | RPM | Varies
PNP Switch | ENG | /Park/Neutral/In Gear | Park/Neutral
Power Enrichment | ENG, FT, HO2S, MF | Active/Inactive | Inactive
Reduced Engine Power | TAC | Active/Inactive | Inactive
SCIP | FT, IND | kPa (psi) | Varies
SCIP Sensor | FT, IND | kPa (psi) | Varies
SCIP Sensor | IND | V | Varies
SCB Solenoid Circuit Status | IND | OK/Incomplete/Short to B+/Short to Ground/Open | OK
SCB Solenoid Command | ENG, IND | % | Varies
Short Term FT Bank 1 or Bank 2 | ENG, EVAP, FT, HO2S | -100 to +100% | -3% to +3%
Spark | ENG, FT, HO2S, IGN, IND, MF | Degrees | --
Start Up ECT | EVAP, HO2S | °C/°F | Varies
Start Up IAT | EVAP, HO2S | °C/°F | Varies
Short Term FT Test Avg Bank 1 or Bank 2 | FT | % | --
Throttle Actuator Forced Engine Shut Down | TAC | Yes/No | No
TAC Motor | TAC | Enabled/Disabled | Enabled
TAC Motor Command | TAC | % | --
TCS Torque Delivered Signal | TAC | % | 1%
TCS Torque Request Signal | TAC | % | --
Torque Delivered Signal | TRANS | Nm | Varies
Torque Management Spark Retard | IGN | Degrees | 0
Total Knock Retard | IGN | Degrees | 0
Total Misfire Count | MF | 0-9999 | 0
TP Desired Angle | TAC | % | 2%
TP Indicated Angle | ALL | 0-99% | 2-3%
TP Performance Test | FT, IND, TAC | OK/Fault | OK
TP Sensor 1 | TAC | 0-5 V | 0.5-0.8 V
TP Sensor 2 | TAC | 0-5 V | 4.1-4.5 V
TP Sensor 1 Indicated Position | TAC | % | 2%
TP Sensor 2 Indicated Position | TAC | % | 2%
TP Sensor 1 Learned Mini. | TAC | 0-5 V | Varies
TP Sensor 2 Learned Mini. | TAC | 5-0 V | Varies
TP Sensors 1 and 2 | TAC | Agree/Disagree | Agree
Vehicle Speed Sensor | ALL | km/mi | 0
Warm-up Since DTC Cleared | ENG | Counts | 0
Warm-up w/o Emission Faults | ENG | Counts | 0
Warm-up w/o Non-Emission Faults | ENG | Counts | 0
Wide Open Throttle | TAC | Yes/No | No