Crash Signal

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 central junction box (CJB), 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 pump.
• Where fitted, the operation of the FFBH is disabled.
• The central junction box (CJB) enters the crash mode and:
• Activates all of the unlock signals of the vehicle locking system, even if the vehicle is already unlocked. After 3 seconds, the central junction box (CJB) activates the unlock signals again.
• 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 they are manually switched off at the lamp unit, or the central junction box (CJB) crash mode is cancelled, after which they return to normal operation.
• Activates the hazard warning lamps. The hazard warning lamps remain on until cancelled by turning the ignition off the crash mode is cancelled.

The crash mode is cancelled by cycling the ignition.