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 incorrect data. Report the problem to the manufacturer. The use of a improperly functioning 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 Symptoms .
Engine Idling/Lower Radiator Hose Hot/Closed Throttle/Park or Neutral/Accessories Off | ||||
|---|---|---|---|---|
Scan Tool Parameter | Data List | Units Displayed | Typical Data Value | Reference |
A/B/C Range Switch | Engine Data 1 | On On On/Off Off Off | On Off On | Automatic Transmission 4L80E |
A/C Compressor | Engine Data 1 | Engaged/Disengaged | Disengaged | Engine Scan Tool Data Definitions |
Accelerator Pedal Pos. 1 | Engine Data 1 | Volts | 0.44-0.95 | Information Sensors |
Accelerator Pedal Pos. 2 | Engine Data 1 | Volts | 3.9-4.5 | Information Sensors |
Accelerator Pedal Pos. 3 | Engine Data 1 | Volts | 3.6-4.1 | Information Sensors |
A/C Relay | Engine Data 1 | On/Off | Off | Engine Scan Tool Data Definitions |
A/C Request | Engine Data 1 | Yes/No | No | Engine Scan Tool Data Definitions |
Actual Inj. Pump Timing | Engine Data 1 | Degree | 4-13.1 | Engine Scan Tool Data Definitions |
APP Angle | Engine Data 1 | % | 0 | Engine Scan Tool Data Definitions |
BARO | Engine Data 1 | kPa | 65-104 This varies with altitude. | Information Sensors |
Boost Pressure Sensor | Engine Data 1 | kPa/PSI | 60-170 kPa (All RPMs) | Information Sensors |
Brake Switch | Engine Data 1 | Open/Closed | Open | Information Sensors |
Calc. A/C Load | Engine Data 1 | Counts | 0 | Engine Scan Tool Data Definitions |
Crank Reference Missed | Engine Data 1 | Counts | 0 | Engine Scan Tool Data Definitions |
Cruise Active | Engine Data 1 | On/Off | Off | Engine Scan Tool Data Definitions |
Cruise Brake Switch | Engine Data 1 | Open/Closed | Closed | Information Sensors |
Cruise Switch | Engine Data 1 | On/Off | Off | Engine Scan Tool Data Definitions |
Desired Idle Speed | Engine Data 1 | RPM | 630-650 | Engine Scan Tool Data Definitions |
Desired Inj. Pump Timing | Engine Data 1 | Degree | 4-10 (at idle) 14-20 (at 2500 RPM) | Engine Scan Tool Data Definitions |
DTC Set This Ignition | Engine Data 1 | Counts | Yes/No | Engine Scan Tool Data Definitions |
ECT | Engine Data 1 | °C/°F | 85°C-105°C (85°F-220°F) (varies with the temperature) | Information Sensors |
ECT Sensor | Engine Data 1 | Volts | 2-3 | Information Sensors |
Engine Load | Engine Data 1 | % | 4-8 | Engine Scan Tool Data Definitions |
Engine Run Time | Engine Data 1 | Hrs/Mins/Sec | Varies with engine run time | Engine Scan Tool Data Definitions |
Engine Speed | Engine Data 1 | RPM | plus or minus 100 RPM from desired | Engine Scan Tool Data Definitions |
Engine Torque | Engine Data 1 | ft lb | 6-10 | Engine Scan Tool Data Definitions |
ESO Solenoid | Engine Data 1 | On/Off | On | Engine Scan Tool Data Definitions |
Fuel Rate | Engine Data 1 | mm3 | 7-15 | Engine Scan Tool Data Definitions |
Fuel Temperature Sensor | Engine Data 1 | °C/°F | 10°C-90°C /50°F-194°F | Information Sensors |
Glow Plug | Engine Data 1 | Volts | 0.0 | Engine Scan Tool Data Definitions |
Glow Plug System | Engine Data 1 | Disable/Enabled | Enabled on key up The times vary with the temperature. | Engine Scan Tool Data Definitions |
Glow Plug System Type | Engine Data 1 | Federal/California | Enabled/Disabled | Engine Scan Tool Data Definitions |
IAT | Engine Data 1 | °C/°F | 10°C-90°C /50°F-194°F (The temperatures may increase during heavy engine loads) | Information Sensors |
Ignition Voltage | Engine Data 1 | Volts | 8-16 volts | Engine Scan Tool Data Definitions |
Inj. Pump CAM Reference Missed | Engine Data 1 | Counts | 0 | Engine Scan Tool Data Definitions |
Inj. Pump Sol. Closure Time | Engine Data 1 | mS | 1.70-1.90 | Engine Scan Tool Data Definitions |
Lift Pump | Engine Data 1 | Volts | 12-16 (0.6 volts more than the ignition voltage) | Engine Scan Tool Data Definitions |
Lift Pump System | Engine Data 1 | Disabled/Enabled | Enabled | Engine Scan Tool Data Definitions |
MIL | Engine Data 1 | On/Off | Off | Engine Scan Tool Data Definitions |
Number Of DTCs | Engine Data 1 | Counts | 0 | Engine Scan Tool Data Definitions |
PCM/VCM in VTD Fail Enable | Engine Data 1 | Yes/No | No | Engine Scan Tool Data Definitions |
Resume Switch | Engine Data 1 | On/Off | Off | Engine Scan Tool Data Definitions |
Service Throttle Soon Lamp | Engine Data 1 | On/Off | Off | Engine Scan Tool Data Definitions |
Set Switch | Engine Data 1 | On/Off | Off | Engine Scan Tool Data Definitions |
Startup ECT | Engine Data 1 | °C/°F | varies The ECT at the time of the engine start up. | Engine Scan Tool Data Definitions |
TDC Offset | Engine Data 1 | Degree | +.75 to-1.75 The factory setting varies per engine. | Engine Scan Tool Data Definitions |
Trans. Fluid Temp. | Engine Data 1 | °C/°F | 50°C-70°C/122°F-158°F | Automatic Transmission 4L80E |
Transmission Range | Engine Data 1 | Park Neutral Reverse Overdrive Drive 3 Drive 2 Drive 1 | Park/Neutral | Automatic Transmission 4L80E |
Vehicle Speed | Engine Data 1 | MPH/km/h | 0 | Engine Scan Tool Data Definitions |
VTD Auto Learn Timer | Engine Data 1 | Active/Inactive | Inactive | Engine Scan Tool Data Definitions |
VTD Fuel Disable | Engine Data 1 | Active/Inactive | Inactive | Engine Scan Tool Data Definitions |
VTD Fuel Disable Until Ign.. Off | Engine Data 1 | Yes/No | No | Engine Scan Tool Data Definitions |
Wastegate Solenoid | Engine Data 1 | % | 50-70 | Engine Scan Tool Data Definitions |
1-2 Sol. | Engine Data 1 | On/Off | On | Automatic Transmission 4L80E |
2-3 Sol. | Engine Data 1 | On/Off | Off | Automatic Transmission 4L80E |
Freeze Frame and Failure Record--Additional parameters are found in FF and FR. | ||||
Fail Counter | Freeze Frame and Failure Record | decimal | The number of times since the DTC has failed | Information Sensors |
First Odometer | Freeze Frame and Failure Record | MPH/ km/h | miles since first failure | Information Sensors |
Last Odometer | Freeze Frame and Failure Record | MPH/ km/h | miles since last failure | Information Sensors |
Not Run Counter | Freeze Frame and Failure Record | decimal | A number of times without a pass or fail | Information Sensors |
Pass Counter | Freeze Frame and Failure Record | decimal | A number of times since the DTC has passed | Information Sensors |
