DTC B1D9F-13: Engine Speed Input - Circuit Open: Action

NOTE: This DTC is not related to any infotainment audio functionality or chimes/beeps/warnings

Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, refer to the electrical circuit diagrams and test the audio amplifier module crank signal input circuit for open circuit, high resistance. Repair the wiring harness as necessary
Using the Jaguar Land Rover approved diagnostic equipment, check the power mode sent to the audio amplifier module from the infotainment master controller. If the audio amplifier module power mode is correct check the communication between the infotainment master controller and the audio amplifier module. Repair as necessary
Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new audio amplifier module