CAUTION: Diagnosis by substituting a component from another vehicle is NOT allowed. The substitution of control units does not guarantee confirmation of the fault and, moreover, may cause additional faults in the tested vehicle and/or in the vehicle from which the units are removed.
1. Visually inspect for obvious signs of mechanical and electrical damage.
| Mechanical elements | Electrical Factors |
2. If there is an obvious cause for a problem you identified or described by a customer, resolve it before proceeding with the next steps (if possible).
3. If the cause is not visually obvious, check the symptom and contact symptom table or check for DTCs and refer to Diagnostic Trouble Code Index (DTC).
Comments on this article