For 1990-2009 cars

Use the scan tool data values under the following conditions:

• | The Diagnostic System Check - Vehicle is complete.

• | The on-board diagnostics (OBDs) are functioning properly.

• | No DTCs 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 tool values below were recorded under the following conditions:

• | Engine at idle

• | Upper radiator hose hot

• | Closed throttle

• | Transmission in Neutral

• | Closed Loop operation

• | Accessories OFF

• | Brake pedal not applied

Scan Tool Parameter | Data List* | Units Displayed | Typical Data Values
--- | --- | --- | ---
Vehicle Speed Sensor | ALL | km/h (mph) | 0

#### *Data List Legend

• | Engine Data (1)

• | Air Data (2)

• | CMP Data (3)

• | Evap Data (4)

• | Fuel Trim Data (5)

• | HO2S Data (6)

• | Ignition Data (7)

• | Induction Data (8)

• | Misfire Data (9)

• | TAC Data (10)

• | Cooling/HVAC Data (11)

• | Cruise Control Data (12)

• | Electrical/Theft Data (13)

• | IPC Data (14)

• | I/M Data (15)