1. Disconnect the wiring connector from the Hall sensor.
2. Connect the multimeter using wires from VAG 1594 to the outer contacts of the wiring connectors (pic. 5.62).
3. Turn on the ignition. Specification value: min. 9 V.
4. Turn off the ignition.
5. Connect the VAG 1598/18 tester to the wiring harness of the control unit connector (rice. 5.45).
6. Check the wires between the tester and the connector for continuity: pin 1 + socket 20, pin 2 + socket 13, pin 3 + socket 8. Wire resistance: max. 1.5 ohm.
7. In addition, check the short circuit of one wire to another. Specification resistance: ∞ Ohm.
8. If no faults are found in the wiring and there is voltage between pins 1 and 3, replace the Hall sensor.
9. If no faults are found and there is no voltage between pins 1 and 3, replace the engine control unit.
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