Crash Signal
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When the RCM outputs any of the fire signals, it also outputs a hard wired crash signal to the ECM (engine control module) and the AJB (auxiliary junction box), and changes the high speed CAN bus output message from 'no crash' to 'crash condition'.
On receipt of the crash signals:
- The ECM disables the fuel tank pump.
- The 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.