Fault-Tracing

Fault tracing

Checking components and wiring

Hint: Knock sensor 1detects knocking on cylinders 5, 6, 7 and 8.
Knock sensor 2 detects knocking on cylinders 1, 2, 3 and 4.








- Ignition off
Check the connector of the knock sensor to which the diagnostic trouble code refers for contact resistance and oxidation.
Disconnect the engine control module (ECM).
Check the signal cable (+) between the control module and the connector of the knock sensor to which the diagnostic trouble code refers for open-circuit and short-circuit to supply voltage.
Measure between:
- Control module terminal #A43 (#A43) and knock sensor bank 1 terminal #2, (ECM-P032800).
- Control module terminal #A42 (#A42) and knock sensor bank 2 terminal #2, (ECM-P033300).
Check the signal cable (-) between the control module and the connector of the knock sensor to which the diagnostic trouble code refers for open-circuit and short-circuit to supply voltage.
Measure between:
- Control module terminal #A20 (#A20) and knock sensor bank 1 terminal #1, (ECM-P032800).
- Control module terminal #A19 (#A19) and knock sensor bank 2 terminal #1, (ECM-P033300).
Remedy as necessary.

Other information
- Connecting the breakout box, B8444S Connecting the Breakout Box
- Knock sensor (KS), replacing, B8444S Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals









Continue - Verification

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Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reconnect the connectors, components, etc.
- Start the engine.
- Test drive the car on the road in different driving conditions with high and low loads so that the engine control module (ECM) can carry out diagnostics.
- Connect VCT2000 to the data link connectorwithout switching off the engine.
- Read the diagnostic status and fault status for the diagnostic trouble code by selecting the diagnostic trouble code in the list.

Note! If the engine is switched off, the stored fault status will be erased and the test drive will have to be repeated.

Check the fault status for the diagnostic trouble code when the scan is "Implemented". When the function is correct the fault status should be "No fault found" when the scan is implemented.





Is the function OK?

Yes - Troubleshooting procedure complete

No - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - Exit Fault-tracing

No - Attempt New Test

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Attempt New Test - Checking components and wiring

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