Crash Signal

WARNING: This page is about a different car, the 2011 Jaguar XKR, 2011 Jaguar XK, 2010 Jaguar XKR, and 2010 Jaguar XK. However, it is still accessible from the selected car via links, so may be relevant.

When the restraints control module (RCM) outputs any of the fire signals, it also outputs a hard wired crash signal to the engine control module (ECM) and the auxiliary junction box (AJB), and changes the high speed controller area network (CAN) bus output message from 'no crash' to 'crash condition'.

On receipt of the crash signals:

The engine control module (ECM) disables the fuel tank pump.
The auxiliary junction box (AJB) enters the crash mode and:
Activates all of the unlock signals of the vehicle locking system, even if the vehicle is already unlocked, repeatedly for 3 seconds, in case an interior door handle is pressed (locking the door) during the crash.

Ignores all locking and superlocking inputs until the crash mode is cancelled, when it returns the locking system to normal operation.

Activates all of the courtesy lamps, except for the approach lamps. The activated courtesy lamps remain on until the crash mode is cancelled, when they return to normal operation.

Activates the hazard warning lamps. The hazard warning lamps remain on until the crash mode is cancelled.

The crash mode is cancelled by cycling the ignition mode.