| Table 1: | Engine Scan Tool Data List |
| Table 2: | Freeze Frame and Failure Record Data List |
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.
Engine Idling/Lower Radiator Hose Hot/Closed Throttle/Park or Neutral/Accessories Off | ||||
|---|---|---|---|---|
Scan Tool Parameter | Data List | Units Displayed | Typical Data Value | Reference |
Engine Speed | Engine Data 1 and 2 | RPM | +/-100 RPM from desired | Engine Scan Tool Data Definitions |
Desired Idle Speed | Engine Data 1 and 2 | RPM | 630 - 650 | Engine Scan Tool Data Definitions |
ECT | Engine Data 1 and 2 | °C/ °F | 85°C - 105°C /185°F - 220°F (varies with temperature) | Information Sensors |
Startup ECT | Engine Data 1 and 2 | °C/ °F | varies (ECT at time of engine startup) | Engine Scan Tool Data Definitions |
IAT | Engine Data 1 and 2 | °C/ °F | 10°C - 90°C /50°F - 194°F (temperatures may increase under heavy engine loads) | Information Sensors |
BARO | Engine Data 1 and 2 | kPa | 65 - 104 (varies with altitude) | Information Sensors |
Engine Shutoff Sol. | Engine Data 1 and 2 | On/Off | On | Engine Scan Tool Data Definitions |
Wastegate Solenoid | Engine Data 1 and 2 | % |
| Engine Scan Tool Data Definitions |
Boost Pressure | Engine Data 1 and 2 | kPa/PSI | 60 - 170 kPa (All RPMs) | Information Sensors |
EPR Solenoid | Engine Data 1 and 2 | On/Off | Off | Information Sensors |
Vehicle Speed | Engine Data 1 and 2 | km/h, mph | 0 mph | Information Sensors |
Fuel Temperature | Engine Data 1 and 2 | °C/ °F | 10°C - 90°C /50°F - 194°F | Information Sensors |
Fuel Rate | Engine Data 1 and 2 | mm3 | 7 - 15 (All RPMs) | Engine Scan Tool Data Definitions |
Glow Plug | Engine Data 1 and 2 | Volts | 0.0-0.2 | Engine Scan Tool Data Definitions |
Glow Plug System | Engine Data 1 and 2 | Disable/Enabled | Enabled on key up (times varies with temperature) | Engine Scan Tool Data Definitions |
Glow Plug System Type | Engine Data 1 and 2 | California/Federal/Not Learned | Depends on system type. | Engine Scan Tool Data Definitions |
Desired Inj. Pump Timing | Engine Data 1 and 2 | ° |
| Engine Scan Tool Data Definitions |
Actual Inj. Pump Timing | Engine Data 1 and 2 | ° |
| Engine Scan Tool Data Definitions |
APP Angle | Engine Data 1 and 2 | % |
| Engine Scan Tool Data Definitions |
EPR Solenoid Test | Engine Data 2 | Pass,Short to B+, Open/Grounded | Pass | Engine Scan Tool Data Definitions |
ESO Solenoid Test | Engine Data 2 | Pass,Short to B+, Open/Grounded | Pass | Engine Scan Tool Data Definitions |
Accelerator Pedal Pos. 1 | Engine Data 1 and 2 | Volts |
| Information Sensors |
Accelerator Pedal Pos. 2 | Engine Data 1 and 2 | Volts |
| Information Sensors |
Accelerator Pedal Pos. 3 | Engine Data 1 and 2 | Volts |
| Information Sensors |
Inj. Pump Sol. Closure | Engine Data 1 and 2 | mS | 1.70 - 1.90 (All RPMs) | Engine Scan Tool Data Definitions |
High Resolution | Engine Data 1 and 2 | counts | 64 | Engine Scan Tool Data Definitions |
TDC Offset | Engine Data 1 and 2 | ° | +0.75 to -1.75 (factory setting varies per engine) | Engine Scan Tool Data Definitions |
Ignition Voltage | Engine Data 1 and 2 | Volts | 12 - 14 (accuracy +/-0.4 volts) | Engine Scan Tool Data Definitions |
Brake Switch | Engine Data 1 | Open/Closed | Open | Information Sensors |
Cruise Brake Switch | Engine Data 1 | Open/Closed | Closed | Information Sensors |
Cruise Active | Engine Data 1 | On/Off | Off | Engine Scan Tool Data Definitions |
Cruise Switch | Engine Data 1 | On/Off | Off | Engine Scan Tool Data Definitions |
Set Switch | Engine Data 1 | On/Off | Off | Engine Scan Tool Data Definitions |
Resume Switch | Engine Data 1 | On/Off | Off | Engine Scan Tool Data Definitions |
Transmission Range | Engine Data 1 | Park/Neutral/Reverse/Overdrive/Drive 3/Drive 2/Drive 1 | Park/Neutral | Automatic Transmission 4L80E |
Crank Reference Missed | Engine Data 1 and 2 | Counts | 0 | Engine Scan Tool Data Definitions |
Inj. Pump CAM Ref. Missed | Engine Data 1 and 2 | Counts | 0 | Engine Scan Tool Data Definitions |
Lift Pump Feedback | Engine Data 1 | Yes/No | Yes | Engine Scan Tool Data Definitions |
Lift Pump System | Engine Data 1 | Disabled/Enabled | Enabled | Engine Scan Tool Data Definitions |
Engine Load | Engine Data 1 | % | 1-15 | Engine Scan Tool Data Definitions |
Engine Torque | Engine Data 1 | ft lb | 3-30 | Engine Scan Tool Data Definitions |
VTD Fuel Disable | Engine Data 1 | Active/Inactive | Inactive | Engine Scan Tool Data Definitions |
VTD Auto Learn Timer | Engine Data 1 | Active/Inactive | Inactive | Engine Scan Tool Data Definitions |
PCM / VCM in VTD Fail Enable | Engine Data 1 | Yes/No | No | Engine Scan Tool Data Definitions |
VTD Fuel Disable Until Ign. Off | Engine Data 1 | Yes/No | No | Engine Scan Tool Data Definitions |
MIL | Engine Data 1 and 2 | On/Off | Off | Engine Scan Tool Data Definitions |
Service Throttle Soon Lamp | Engine Data 1 | On/Off | Off | Engine Scan Tool Data Definitions |
Trans. Fluid Temp. | Engine Data 1 | °C/ °F | 50°C - 80°C/122°F - 158°F | Automatic Transmission 4L80E |
Calc. A/C Load | Engine Data 1 | Counts | 0 | Engine Scan Tool Data Definitions |
A/C Request | Engine Data 1 | Yes/No | No | Engine Scan Tool Data Definitions |
Wastegate Sol. State | Engine Data 1 | On/Off | On | Engine Scan Tool Data Definitions |
Wastegate Sol. Test | Engine Data 1 | Pass, Shhort to B+, Open/Groundeed | Pass | Engine Scan Tool Data Definitions |
A/C Relay | Engine Data 1 | On/Off | Off | Engine Scan Tool Data Definitions |
4WD Low | Engine Data 1 | Disabled | Automatic Transmission | Information Sensors |
4WD High | Engine Data 1 | Disabled | Automatic Transmission | Information Sensors |
Trailer Mode
| Engine Data 1 | Yes/No | No | Engine Scan Tool Data Definitions |
Engine Run Time | Engine Data 1 and 2 | Hrs/Mins/Sec | Varies with engine run time | Engine Scan Tool Data Definitions |
Freeze Frame and Failure Record (additional paramters found in a FF and FR) | ||||
|---|---|---|---|---|
Scan Tool Parameter | Data List | Units Displayed | Typical Data Value | Reference |
First Ododmeter | Freeze Frame and Failure Record | MPH/ km/h | miles since first failure | Information Sensors |
Last Ododmeter | Freeze Frame and Failure Record | MPH/ km/h | miles since last failure | Information Sensors |
Fail Counter | Freeze Frame and Failure Record | decimal | A number of times since the DTC has failed | Information Sensors |
Pass Counter | Freeze Frame and Failure Record | decimal | A number of times since the DTC has passed | Information Sensors |
No Result Counter | Freeze Frame and Failure Record | decimal | A number of times without a pass or fail | Information Sensors |
