2. Disconnect the wiring connector from the crankshaft speed sensor (pic. 7.49).
3. Measure the resistance between pins 1 and 2 of the connector (pic. 7.50). Specification value: 1.0-1.5 kOhm.
4. If the specified value is not reached, replace the sensor.
5. If the set value is reached:
- connect the VAG 1598/22 tester to the engine control unit wiring harness (rice. 7.38);
- check the wire between the tester and the connector for an open circuit: pin 1 and socket 69. pin 2 and socket 67, pin 3 and socket 71 (pic. 7.51) Set value: 1.5 ohm;
- additionally check the wires for an open circuit. Specification resistance: ∞ Ohm.
6. If no fault is found in the wires, replace the engine control unit.
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