DTC B1D9F-12: Engine Speed Input - Circuit short to battery: Action

WARNING: This page is about a different car, the 2018 Land Rover Discovery and 2017 Land Rover Discovery. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: When checking the audio amplifier module crank signal input circuit for a short circuit to ground the engine must be off with the audio amplifier module powered on

Refer to the appropriate SYSTEM WIRING DIAGRAMS information and check the audio amplifier module crank signal input circuit for short circuit to power. Repair the wiring harness as necessary. Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest
Use an oscilloscope to examine the signals from the Powertrain Control Module (PCM). Using the Jaguar Land Rover approved diagnostic equipment, check the PCM for related DTCs and refer to the relevant DTC index
Using the Jaguar Land Rover approved diagnostic equipment, reconfigure the audio amplifier module to the latest level software
Using the Jaguar Land Rover approved diagnostic equipment, check and update the car configuration file as necessary, clear the DTCs and retest
Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new audio amplifier module as required