DTC B155D-01: Seat Head Restraint Height Motor Drive - General electrical failure: Action

Refer to the electrical circuit diagrams and check the seat head restraint height motor position sensor 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, clear the Diagnostic Trouble Code(s) and retest. If the fault persists, install a new seat head restraint height motor