Signal Too Low

Signal too low

Checking the components and wiring
- Check knock sensor (KS) connector. Check for contact resistance and oxidation.
Check the signal cable between knock sensor (KS) terminal #1 and engine control module (ECM) terminal #A80 (#B20) and the ground lead between knock sensor (KS) terminal #2 and engine control module (ECM) terminal #A56 (#A56). Check for an open-circuit. Check for a short-circuit to ground.
Check that the knock sensor (KS) is tightened to the correct torque.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting The Breakout Box, Engine Control Module (ECM)
- Signal specification Signal Specification, Engine Control Module (ECM)
- Knock sensor (KS) Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals.










Continue - Verification

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Verification




Verification

Verification

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








- Ignition off
- Reconnect the connectors, reinstall components etc.
- Start the engine and run it to normal operating temperature
- Run the engine to 3500 rpm. Read off the value of the knock sensor (KS) signal. The value must be between 2-6.





Is the function OK?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - Fault Found

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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 the components and wiring

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