Use the scan tool data listed in this table for comparison after the On-Board Diagnostic system check and finding the on-board diagnostics function properly with no diagnostic codes displayed.
The Typical Scan Tool Data Values are an average of display values recorded from normally operating vehicles. The Typical Scan Tool Data Values are intended to represent what a normally functioning system would display. The values you get may vary due to a low battery charge or other reasons. But they should be very close.
Do not use a scan tool that displays faulty data. Report the problem to the manufacturer. The use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.
Use only the parameters listed in the tables for diagnosis. If a scan tool reads other parameters, the values are not recommended by General Motors for use in diagnosis. For more description on the values and the use of the scan tool diagnosis the PCM inputs, refer to the applicable diagnosis. If all values are within the range illustrated, refer to Driveability Symptoms.
Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
Engine Idling/Lower Radiator Hose Hot/Closed Throttle/Park or Neutral/Accessories Off | |||
Accelerator Pedal Pos. 1 | Engine Data 1 | Volts |
|
Accelerator Pedal Pos. 2 | Engine Data 1 | Volts |
|
Accelerator Pedal Pos. 3 | Engine Data 1 | Volts |
|
A/C Relay Command | Engine Data 1 | On/Off | Off |
A/C Request Signal | Engine Data 1 | Yes/No | No |
APP Indicated Angle | Engine Data 1 | % |
|
BARO | Engine Data 1 | kPa | 65-104 (varies with altitude) |
Boost Pressure Sensor | Engine Data 1 | kPa/psi | 60-170 kPa (All RPMs) |
Calculated Fuel Rate | Engine Data 1 | mm3 | 7-15 (All RPMs) |
CKP Sensor Pulses Missed | Engine Data 1 | Counts | 0 |
Cruise Control Active | Engine Data 1 | On/Off | Off |
Cruise/Resume/Accel Switch | Engine Data 1 | On/Off | Off |
Cruise Set/Coast Switch | Engine Data 1 | On/Off | Off |
Cruise Switch | Engine Data 1 | On/Off | Off |
Desired Idle Speed | Engine Data 1 | RPM | 630-650 |
Desired Inj. Pump Timing | Engine Data 1 | ° |
|
DTC Set This Ignition | Engine Data 1 | Counts | Yes/No |
ECT Sensor | Engine Data 1 | °C/ °F | 85-105°C (185-220°F) (varies with temperature) |
ECT Sensor | Engine Data 1 | Volts | 2-3 |
Engine Load | Engine Data 1 | % | 1-15 |
Engine Run Time | Engine Data 1 | Hrs/Mins/Sec | Varies with engine run time |
Engine Speed | Engine Data 1 | RPM | +/-100 RPM from desired |
Engine Shutoff Solenoid | Engine Data 1 | On/Off | On |
Engine Torque | Engine Data 1 | lb ft | 3-30 |
Fuel Pump Relay Command | Engine Data 1 | Disabled/Enabled | Enabled |
Fuel Pump Relay Feedback | Engine Data 1 | Volts | 12-16 (0.6 volts higher than ignition voltage) |
Fuel Temperature Sensor | Engine Data 1 | °C/ °F | 10-90°C (50-194°F) |
Glow Plug Feed Back Signal | Engine Data 1 | Volts | 0.0-0.2 |
Glow Plug Relay Command | Engine Data 1 | Disable/Enabled | Enabled on key up (times varies with temperature) |
IAT Sensor | Engine Data 1 | °C/ °F | 10-90°C (50-194°F) (temperatures may increase under heavy engine loads) |
Ignition 1 Signal | Engine Data 1 | Volts | 12-14 (accuracy +/-0.4 volts) |
Inj. Pump Sol. Closure Time | Engine Data 1 | mS | 1.70-1.90 (All RPMs) |
Injection Pump CAM Reference Missed | Engine Data 1 | Counts | 0 |
Injection Pump Timing Signal | Engine Data 1 | ° |
|
MIL Command | Engine Data 1 | On/Off | Off |
Number Of DTCs | Engine Data 1 | Counts | 0 |
PCM in VTD Fail Enable | Engine Data 1 | Yes/No | No |
Service Throttle Soon Lamp | Engine Data 1 | On/Off | Off |
Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
Start up ECT | Engine Data 1 | °C/ °F | Varies (ECT at time of engine startup) |
Stop Lamp Pedal Switch | Engine Data 1 | Open/Closed | Open |
TCC/Cruise Brake Pedal | Engine Data 1 | Open/Closed | Closed |
TDC Offset | Engine Data 1 | ° | 0.75-1.75 (factory setting varies per engine) |
TFT Sensor | Engine Data 1 | °C/ °F | 50-80°C (122-158°F) |
Torque Delivered | Engine 1 | N·m | Varies |
TR SW | Engine Data 1 | Park/Neutral/Reverse/Overdrive/Drive 3/Drive 2/Drive 1 | Park/Neutral |
Vehicle Speed Sensor | Engine Data 1 | mph/km/h | 0 |
VTD Auto Learn Timer | Engine Data 1 | Active/Inactive | Inactive |
VTD Fuel Disable | Engine Data 1 | Active/Inactive | Inactive |
VTD Fuel Disable Until Ign. Off | Engine Data 1 | Yes/No | No |
Wastegate Solenoid Command | Engine Data 1 | % |
|
