DTC P1628-62: Module Ignition Supply Input - Signal compare failure: Action
- Refer to the electrical circuit diagrams and check the all wheel drive control module ignition circuit for short circuit to ground, short circuit to power, open circuit, high resistance
- Check both module connectors for sign of water ingress and replace as required
- If no water ingress is detected, check the central junction box for related DTCs and refer to the relevant DTC index
- If no related DTCs are present, using the Jaguar Land Rover approved diagnostic equipment, reconfigure the all wheel drive control module with the latest level software. Clear DTCs, cycle ignition and retest