B1D17-87 Battery Backed Sounder - Missing message: Action

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

Refer to the appropriate SYSTEM WIRING DIAGRAMS information and check the battery back-up sounder power and ground circuits for open circuit, high resistance. Repair the wiring harness as necessary
Refer to the appropriate SYSTEM WIRING DIAGRAMS information and check the alarm LIN bus 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 DTCs and retest. If the fault persists, install a new battery back-up sounder