Collision Signal, Checking

Collision Signal, Checking

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

The airbag control module sends the crash signal to the ECM (during an accident or if a Output Diagnostic Test Mode (DTM) is carried out relating to the airbag system), the ECM switches off the fuel pump. This means that the engine will stop running but can be started again afterward (e.g. to remove vehicle from danger).

- Connect test box (VAG1598/31) to wiring harness for ECM; do not connect test box directly to ECM. Refer to => [ Electrical Testing, with Test Box VAG 1598/31 ] Electrical Testing, With Test Box VAG 1598/31.

- Check for open circuit and short to positive (B+) or Ground (GND) in following wiring connections:





- Repair any open/short circuit as necessary.

If no problems with wires are found:

- Check DTC memory of Airbag Control Module (J234 ).