DTC P18A8-74: Differential Actuator Brake Control - Actuator slipping: Action

NOTE:

This DTC may be induced by excessive electric differential clutch operation due to prolonged off road or track driving.
After installing a new rear differential control module, differential locking motor or electric differential, clear the DTCs and calibrate the system by performing routine - On Demand Self Test.

Refer to the electrical circuit diagrams and check the differential locking motor circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair circuit as necessary
Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and perform routine - On Demand Self Test. If the fault persists, install a new differential locking motor
Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and perform routine - On Demand Self Test. If the fault persists, install a new rear differential control module