Audi Workshop Service and Repair Manuals

In the event of an accident (crash) resulting in triggering of the belt tensioners/airbag, the engine control unit deactivates the fuel pump relay, thus preventing excessive fuel spillage should the fuel system be damaged.

As long as the fault "Crash deactivation triggered" is stored in the engine control unit/has not been erased, fuel pump supply is disabled with ignition ON (no supply pressure is generated in the fuel system). This may result in delayed starting of the engine.

• ‒ Connect test box V.A.G 1598/31 to engine control unit wiring harness. Actual engine control unit is not to be connected=>Page 24-12.

Check for short to positive/earth and open circuit in the following wiring.

• Resistance: max. 1.5 ohms

• ‒ If necessary, eliminate open circuit in wiring/short circuit.

If no fault is found in wiring:

• ‒ Interrogate fault memory of airbag control unit.