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 check the integrity of the system and for obvious signs of mechanical and electrical damage.
Mechanical factors | Electrical Factors |
Switches | |
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 the central junction box for DTCs and refer to the Diagnostic Trouble Code Index (DTC).
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