R32 4Motion V6-3.2L (CBRA) (2008)
Knock Sensor: Testing and Inspection
Knock Sensor 2 G66, Checking
Knock Sensor 2 G66, Checking
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) 2 G66 tightened to 20 Nm.
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The 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.
Test procedure
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Perform a preliminary check to verify the customers complaint. See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing
and Procedures/Preliminary Check
Start diagnosis
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Disconnect the Knock Sensor (KS) 2 G66 electrical harness connector.
Checking internal resistance
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Using a Multimeter, check the Knock Sensor (KS) 2 G66 terminals 1 to 2 for an internal short.
Specified value: Infinity (Infinity).
If the specified value was not obtained:
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Replace Knock Sensor (KS) 2 G66.
If the specified value was obtained:
Checking wiring
If the specified value was not obtained:
If the manufacturers test box is being used. Perform the following step.
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Install the test box.
If the manufacturers test box is not being used. Perform the following step.
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Remove the Engine Control Module (ECM) J623.