Crash Signal Wiring, Testing

Wire For Crash Signal, Checking

The Engine Control Module (ECM) receives the crash signal ("Crash shut-off was triggered") from the airbag control module.

When the airbag control module sends the crash signal to the ECM (during an accident or when output DTM is being performed for the airbag system), the ECM switches the Fuel Pump (FP) off. This means that the engine will stop running but can be started again afterward (e.g. to remove vehicle from danger).

- Connect VAG1598/31 test box at wiring harness to Engine Control Module (ECM) but do not connect ECM.
- Check following wiring connection for open circuit and short circuit to Ground (GND) and B+:

Test box VAG1598/31 Socket Control module for Airbag -J234- Terminal
67 See Electrical Wiring Diagrams, Troubleshooting & Component Locations

- Repair open circuit in wiring or short circuit if necessary.

If no malfunctions are found in wiring:
- Check DTC memory of control module for airbag.