CAUTION: Diagnosis by substituting a component from another vehicle is NOT allowed. The substitution of control modules does not guarantee confirmation of the fault and, moreover, may cause additional faults in the vehicle being checked and/or in the vehicle from which the modules are removed.
1. Visually inspect for obvious signs of mechanical, electrical, or hydraulic problems.
Mechanical factors | Electrical Factors | Hydraulic |
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. Use an approved diagnostic system or scan tool (tester), to retrieve all DTCs before accessing the DTC Index (DTC).
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