Crash Signal
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.
When the RCM outputs any of the fire signals it also outputs a crash signal to the BCM/GWM and the Engine Control Module (ECM) on the High Speed (HS) Controller Area Network (CAN) powertrain bus systems. On receipt of the crash signal, the ECM cuts the power supply to the fuel pump relay and the BCM/GWM goes into crash mode. In the crash mode, the BCM/GWM:
- Activates all of the unlock signals of the vehicle locking system, even if the vehicle is already unlocked.
- Ignores all locking/superlocking inputs until it receives an unlock input, when it returns the locking system to normal operation.
- Activates the interior lamps. The interior lamps remain on permanently until they are manually switched off at the lamp unit, or the BCM/GWM crash mode is switched off and they return to normal operation.
- Disables the rear window child lock input until the crash mode is switched off.
- Activates the hazard flashers. The hazard flashers remain on until cancelled by the hazard warning switch or the crash mode is switched off.
The BCM/GWM crash mode is switched off by a valid locking and unlocking cycle of the locking system.