Eos (1F7) V6-3.2L (BUB) (2008)
Knock Sensor: Testing and Inspection
Knock Sensor, Checking
The following procedure is used to diagnose Knock Sensor (KS) 1 (G61)/Knock Sensor (KS) 2 (G66 ).
Special tools, testers and auxiliary items required
‹› Wiring diagram.
‹› The mounting bolt of Knock Sensor (KS) 1 (G61)/Knock Sensor (KS) 2 (G66) tightened to 20 Nm.
‹› The 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.
Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Computers and Control Systems/Testing
and Inspection/Scan Tool Testing and Procedures/Preliminary Check
‹› Before disconnecting the Knock Sensor electrical harness connectors, mark the component location.
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
Using a Multimeter, check the Knock Sensor terminals 1 to 2 for an internal short.