Use the scan tool data values under the following conditions:
| • | The Powertrain Diagnostic 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 |
|---|---|---|
A/C Clutch | On/Off | Off |
BARO | Kpa | Varies |
Brake Switch | Open/Closed | Closed |
Cruise | Disabled/Enabled | Disabled |
Desired Idle Speed | RPM | Varies (600-800) |
ECT | C°/F° | 85°-115°C (185°-239°F) |
Engine Run Time | Hours:Minutes:Seconds | Varies |
Engine Speed | RPM | 100 rpm from desired idle (600-800) |
Engine Torque | N·m (lb ft) | 0-3 N·m (lb ft) |
Ignition Voltage | Volts | 12.0-15.0 volts |
MAP | Kpa | 35-40 Kpa |
Number of DTCs | Numeral | 0 |
Speed Ratio | Ratio | 8.00 |
TCC Enable | Yes/No | No |
TCC Slip Speed | RPM | Varies (590-750) |
TP Angle | % | 0% |
TP Sensor | Volts | 0.37-0.40 volts |
Transmission OSS | RPM | 0 |
Transmission Range | Park/Reverse/Neutral/Drive/Drive 2/Low/Invalid | Park |
TR Sw A/B/C/P | HI/LOW | LOW/HI/HI/LOW |
Vehicle Speed | mph/km/h | 0 |
