Use the scan tool data values under the following conditions:
| • | The Powertrain On-Board Diagnostic (OBD) System Check is complete |
| • | The on-board diagnostics are functioning properly |
| • | No DTC's are present |
The values below represent a typical display recorded from a properly functioning system.
Important:: Do not use a scan tool that displays faulty data. Report the condition to the scan tool manufacturer. The use of a faulty scan tool can result in misdiagnosis and the unnecessary replacement of parts.
Only the parameters listed below are used in this manual for diagnosing. If a scan tool displays other parameters, the values are not recommended by General Motors for use in diagnosis.
Scan values are performed under the following conditions:
| • | Engine at idle |
| • | Upper radiator hose is hot |
| • | Closed throttle |
| • | Transmission in Park |
| • | Closed loop operation |
| • | Accessories OFF |
| • | Brake pedal not applied |
Scan Tool Parameter | Units | Typical Data Value |
|---|---|---|
Engine Torque | N·m (lb ft) | 0-3 N·m (lb ft) |
TP Sensor | Volts | 0.37-0.40 volts |
TP Angle | % | 0% |
Engine Speed | rpm | 100 rpm from desired idle (600-800) |
Desired Idle Speed | rpm | Varies (600-800) |
Transmission OSS | rpm | 0 |
Vehicle Speed | mph/km/h | 0 |
Speed Ratio | Ratio | 8.00 |
ECT | C°/F° | 85°-115°C (185°-239°F) |
MAP | Kpa | 35-40 Kpa |
BARO | Kpa | Varies |
Brake Switch | Open/Closed | Closed |
TCC Enable | Yes/No | No |
TCC Slip Speed | RPM | Varies (590-750) |
Transmission Range | Park/Reverse/Neutral/Drive/Drive 2/Low/Invalid | Park |
Ignition Voltage | Volts | 12.0-15.0 volts |
Engine Run Time | Hours:Minutes:Seconds | Varies |
Cruise | Disabled/Enabled | Disabled |
A/C Clutch | On/Off | Off |
Number of DTC's | Numeral | 0 |
