DTC P0634-68: Control Module Internal Temperature "A" Too High - Event Information: Action
- If the vehicle temperature is excessive, with the vehicle ignition switched off allow sufficient time for the vehicle to cool. Consider the surrounding ambient temperature
- Clear the DTC and retest
- Carry out visual check of the rear differential coupling for oil leaks repair as required
- Carry out oil level check procedure. For additional information, refer to: Active On-Demand Coupling Filling
- Check and install a new (GEN 4) rear differential control module kit as required. For additional information, refer to: Active On-Demand Coupling Module