2. Disconnect the wiring connector from the injector needle movement sensor.
3. Measure the resistance between the pins of the connector (pic. 6.92). Set value: 80-120 ohm.
4. If the specified value is not reached, replace the nozzle of the third cylinder with the nozzle movement sensor.
5. If the set value is reached:
On vehicles with a 68-pin control unit wiring connector
- Connect the VAG 1598/18 tester to the engine control unit wiring harness (rice. 6.54);
- Check the wire between the tester and the connector for an open circuit: pin 1 + socket 12, pin 2 + socket 11 (pic. 6.93). Set value: 1.5 ohm;
- Additionally, check the wires for shorting one to the other, to «mass» vehicle and to the positive pole of the battery. Specification resistance: ∞ Ohm;
On vehicles with 80-pin control unit wiring connector
- Connect the VAG 1598/22 tester to the engine control unit wiring harness (rice. 6.56);
- Check the wire between the tester and the connector for an open circuit: pin 1 and socket 62, pin 1 and socket 55 (pic. 6.93). Set value: 1.5 ohm;
- Additionally, check the wires for shorting one to the other, to «mass» vehicle and to the positive pole of the battery. Specification resistance: ∞ Ohm.
For all vehicles
6. If no fault is found in the wires, replace the engine control unit.
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