Test Description

WARNING: This page is about a different car, the 2003 GMC Sonoma and 2003 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

1. This test ensures that the scan tool is getting power.
2. This test ensures that the scan tool is communicating to the PCM.
3. This test ensures that the PCM has the latest calibrations.
6. This test checks to see if any related DTCs should be diagnosed first.
9. This test checks to see if the customer concern is with Inspection and Maintenance (I/M) testing.

Fig 1: Diagnostic System Check - Manual Transmission (1 Of 2)
Courtesy of GENERAL MOTORS CORP.

Fig 2: Diagnostic System Check - Manual Transmission (2 Of 2)

Courtesy of GENERAL MOTORS CORP.