DTC P0A1A-87: Generator Control Module - Missing message: Action
- Check the installation of the startup battery terminal clamps. Rectify as necessary
- Check the integrity of the generator circuit connectors. Rectify as required
- Refer to the electrical circuit diagrams and check the generator power circuit for short circuit to ground, open circuit, high resistance. Repair the wiring harness as necessary
- Refer to the electrical circuit diagrams and check the generator LIN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary
- Refer to the relevant service information and check the accessory drive belt tension. Rectify as necessary
- Using the Jaguar Land Rover approved diagnostic equipment, perform routine - Power Supply Service Mode Diagnostic. Clear the Diagnostic Trouble Code(s) and retest
- If the fault persists, check and install a new generator as required