| Diagnosis and Testing Refer to Wiring Diagrams Section 419-10, for schematic and connector information. Diagnosis and Testing NOTE:The central timer module (CTM) is integrated in the instrument cluster (ICL). - Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection | Electrical | - Fuse(s)
- Wiring harness
- Electrical connector(s)
| - If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step. CHECK the operation of the system.
- If the concern persists after the visual inspection, CARRY OUT a fault diagnosis on the instrument cluster (ICL) with WDS and RECTIFY any displayed faults in accordance with the fault description. CHECK the operation of the system.
- If no fault code is stored, CONTINUE with the Symptom Chart.
Symptom Chart Symptom Chart | Symptom | Possible Sources | Action | | Central timer module (CTM) not communicating with the diagnostic unit | * Fuse(s) * Circuit(s) * Instrument cluster (ICL) or CTM | * | | Self-test cannot be activated | * Fuse(s) * Circuit(s) * Instrument cluster (ICL) or CTM | * | |
