volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Tune-up and Engine Performance Checks > < Diagram Information and Instructions|Page 2585
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Knock Sensor: Service and Repair

Knock Sensor

CAUTION:Disconnect the battery ground strap. Limited space between the alternator electrical connection and the knock sensor mounting bolt may

cause an accidental short between the two components.

1.

With the ignition "Off", disconnect the knock sensor electrical connector.

2.

Remove the knock sensor mounting bolt and lift out the knock sensor. Take note of the harness routing.

3.

Reinstall the knock sensor and CAREFULLY torque the retaining bolt to specification, (engine cold, 15 - 18 ft. lbs.).

NOTE: Verify that the terminals for the knock sensor harness connectors are of the same material. Replacement knock sensors have gold plated

terminals. Earlier original equipment sensors have alloy plated terminals. When a knock sensor with gold terminals is installed, be sure to
replace the matching harness connector with gold terminals.

4.

Reinstall the battery ground strap.

Tune-up and Engine Performance Checks > < Diagram Information and Instructions|Page 2585