DTC P0A1A-87: Generator Control Module - Missing message: Action

WARNING: This page is about a different car, the 2023 Jaguar F-Pace and 2022 Jaguar F-Pace. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For non-electric vehicles:

Refer to the electrical circuit diagrams and check the installation of the startup battery terminal clamps. Rectify as necessary
Refer to the electrical circuit diagrams and check the integrity of the generator 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 LIN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary. Clear the DTCs and retest
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 the routine - Power Supply Service Mode Diagnostic. Clear the DTCs and retest
If the fault persists, install a new generator as required. Clear the DTCs and retest
NOTE: For electric vehicles:

Inspect the installation of the startup battery terminal clamps. Rectify as necessary
Inspect the integrity of the Direct current to direct current converter circuit connectors. Rectify as required
Refer to the electrical circuit diagrams and inspect the Direct current to direct current converter power circuit for short circuit to ground, open circuit, high resistance. Repair the wiring harness as necessary
Using the Jaguar Land Rover approved diagnostic equipment, perform the communication network failure procedure. Refer to the electrical circuit diagrams and inspect the high speed CAN bus (power mode zero) circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness 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, inspect and install a new Direct current to direct current converter as required