Impact Sensor: Testing and Inspection

Wire For Crash Signal, Checking

Special Tools and Equipment







- VAG1526A
- VAG1527B
- VAG1594A
- VAG1598/31
- VAS5051 with VAG5051/1

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), do not connect ECM. Refer to "Scan Tool Testing/Wire and Component Testing Using VAG1598/31 Test Box" Testing and Inspection
- Check the following wire connection for open circuit and short circuit to Ground (GND) and B+:

Test box Control module for
VAG1598/31 Airbag -J234-
Socket Terminal
54 -


- Repair open circuit or short circuit if necessary.

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