For 1990-2009 cars

The Engine Scan Tool Data List contains all of the engine related parameters that are available on the scan tool. The list is arranged in alphabetical order.

Use the Engine Scan Tool Data List only after verifying the following:

• | The Powertrain On-Board Diagnostic System Check is completed.

• | No diagnostic trouble codes (DTCs) are present.

• | 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 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 problem should be reported to the manufacturer. The 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 for diagnosis.

Scan Tool Parameter | Data List | Units Displayed | Typical Data Value
--- | --- | --- | ---
Engine Idling/Upper Radiator Hose Hot/Closed Throttle/Transmission in Park or Neutral/Closed Loop
AC Relay Command | Engine Data | On/Off | Off
AC Request Signal | Engine Data | Yes/No | No
Cam Phase Angle Actual | Camshaft Phase Data | Degrees | 0°
Cam Phase Angle Desired | Camshaft Phase Data | Degrees | 0°
Cam Phase Angle Variance | Camshaft Phase Data | Degrees | 0°
Camshaft Phase Solenoid | Camshaft Phase Data | Percent | 36%
Decel Fuel Cutoff | Engine Data | Active/Inactive | Inactive
Diagnostic Mode | Engine Data | Normal/Check | Normal
ECT Sensor | Engine Data | °C (°F) | 80-90°C (176-194°F)
Engine Load | Engine Data | Percent | 14-30%
Engine Speed | Engine Data | RPM | 650-750 RPM
Engine Speed at Misfire | Misfire Data | RPM | 0 RPM
EVAP Purge Solenoid | EVAP Data | On/Off | Off
Fuel Tank Pressure Sensor | EVAP Data | mm Hg/in H2O | Varies
Fuel Pump Relay Command | Engine Data | On/Off | On
High Electrical Load | Engine Data | Yes/No | No
HO2S 1 | Engine Data | mV | varies
HO2S 1 L/R Response Time | Engine Data | ms | 0-1000 ms
HO2S 1 R/L Response Time | Engine Data | ms | 0-1000 ms
HO2S 2 | Engine Data | mV | varies
IAC Motor Command | Engine Data | Percent | 27-47%
IAT Sensor | Engine Data | °C (°F) | Varies with underhood and ambient air temperatures
Ign. Cycle Counter | Engine Data | Counts | 0-400 Counts
Injector 1 Command | Engine Data | ms | 1.90-2.25 ms
Load at Misfire | Misfire Data | G/Rev | 0.00 G/Rev
Long Term FT | Engine Data | Percent | -20% to +20%
Loop Status | Engine Data | Open/Closed | Closed
MAF Sensor | Engine Data | g/s | 1.75-2.10 g/s
MIL Command | Engine Data | On /Off | Off
Misfire Current Cyl #1 | Misfire Data | Counts | 0
Misfire Current Cyl #2 | Misfire Data | counts | 0
Misfire Current Cyl #3 | Misfire Data | Counts | 0
Misfire Current Cyl #4 | Misfire Data | Counts | 0
Number of DTCs | Engine Data | Varies | 0
PNP Switch | Engine Data | Park/Neutral or In Gear | Park/Neutral
Short Term FT | Engine Data | Percent | -20% to +20%
Spark | Engine Data | Degrees | 8-18°
Starter Switch | Engine Data | Released/Cranking | Released
TCC Brake Pedal Switch* | Engine Data | Released/Applied | Released
TCC Enable Solenoid Command* | Engine Data | On/Off | Off
Total Fuel Trim Average | Engine Data | Counts | 0.25-0.75 (varies)
Total Misfire Current Count | Misfire Data | Counts | 0
TP Sensor | Engine Data | Percent | 8-11%
Vehicle Speed Sensor | Engine Data | km/h/mph | 0 km/h
* 4-spd Automatic Transmission Equipped Vehicles Only