S6 Quattro Sedan V10-5.2L (BXA) (2007)
Knock Sensor: Testing and Inspection
Knock Sensor, Checking
Knock Sensor 1
The following procedure is used to diagnose Knock Sensor (KS) 1 (G61) which is controlled by Motronic Engine Control Module (ECM) (J623).
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirements
‹› The mounting bolt of Knock Sensor (KS) 1 (G61) tightened to 20 Nm.
‹› The Motronic Engine Control Module (ECM) (J623) fuses OK.
‹› Battery voltage at least 12.5 volts.
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› Vehicles with automatic transmission, shift selector lever into position " P" or "N".
‹› A/C switched off.
‹› Ground (GND) connections between engine/transmission/chassis OK.
‹› Ignition switched off.
Procedure
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Remove the front engine cover - 1 -.
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Disconnect the orange Knock Sensor (KS) 1 (G61) electrical harness connector- 9 -.