GTI L4-2.0L Turbo (BPY) (2007)
Knock Sensor: Testing and Inspection
Knock Sensor (KS) 1 G61 / Knock Sensor (KS) 2 G66, Checking
The following procedure is used to diagnose all Knock Sensors.
Special tools, testers and auxiliary items required
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Multimeter.
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Wiring diagram.
Test requirements
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The mounting bolt of Knock Sensor (KS) 1 G61 / Knock Sensor (KS) 2 G66 tightened to 20 Nm.
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The Motronic Engine Control Module (ECM) J623 fuses OK.
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Battery voltage at least 12.5 volts.
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All electrical consumers such as, lights and rear window defroster, switched off.
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Vehicles with automatic transmission, shift selector lever into position "P" or "N"
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A/C switched off.
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Ground (GND) connections between engine/transmission/chassis OK.
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Ignition switched off.
Procedure
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Remove the engine cover with air filter.
NOTE: Before disconnecting the Knock Sensor electrical harness connectors, mark the component location.
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Disconnect the green Knock Sensor (KS) 1 G61 electrical harness connector -1 - or the gray Knock Sensor (KS) 2 G66 electrical harness
connector -2-.
Checking internal resistance