- Important Preliminary Checks

Before using this section, you should have performed the Powertrain On-Board Diagnostic System Check and determined that:

1. The Control Module and Malfunction Indicator Lamp (MIL) are operating correctly.

2. There are no Diagnostic Trouble Codes (DTCs) stored, or a DTC exists but without a MIL.

Several of the following symptom procedures call for a careful visual and physical check. The visual and physical checks are very important. The checks can lead to correcting a problem without further checks which may save valuable time.