CAUTION: Diagnosis by substituting a component from another vehicle is NOT allowed. Substitution of control modules does not guarantee confirmation of the fault and, in addition, may cause additional faults in the vehicle being tested and/or in the vehicle from which the modules are removed.
1. Visually inspect for obvious signs of electrical damage.
Electrical Factors:
- Fuse (And)
- electrical connector (s)
- Wiring harness
2. If an obvious cause of a problem you identified or described by the customer is found, correct it before proceeding to the next steps (if possible).
3. If the cause is not visually obvious, check for DTCs and refer to the Index diagnostic trouble codes (DTC).
Comments on this article