CAUTION: Diagnostics by substituting a component from another vehicle is NOT permitted. Substituting 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 mechanical and electrical damage.
| Mechanical factors | Electrical factors |
2. If an obvious cause for the problem you identified or the customer described is found, correct it (if possible) before moving on to further action.
3. If the cause is not visually obvious, check the TCM for DTCs and refer to the Diagnostic Trouble Code (DTC) Index.
The original article is located on [lrman.ru]
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