For 1990-2009 cars

### Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

1. Tests if the BCM can enter the On-Board Diagnostic Mode. Refer to On-Board Diagnostic Features .

2. The presence of DTCs stored in the BCM. The specified procedure will compile all the available information before tests are performed.

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Body Control System Schematics
1 | Enter the BCM Diagnostic Mode. Refer to On-Board Diagnostic Features . Does the BCM enter the Diagnostic Display mode? | Go to Step 2 | Go to Body Control Module Inoperative
2 | Select display BCM DTCs. Refer to On-Board Diagnostic Features . Does the BCM display any DTCs? | Go to Diagnostic Trouble Code (DTC) List/Type | Go to the Applicable Symptom Table