Signal Too Low

Signal too low

Checking the components and wiring
Check the knock sensor (KS) connector. Check for contact resistance and oxidation.
Check the signal cable between knock sensor (KS) terminal #3 and engine control module (ECM) terminal #A79 (#B19). Check the ground lead between knock sensor (KS) terminal #4 and engine control module (ECM) terminal #A55 (#A55). 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

-------------------------------------------------

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

------------------------

VERIFICATION FAILED - Fault-tracing information

VERIFIED - Fault Found

-------------------------------------------------

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

------------------------

Attempt New Test - Checking the components and wiring

-------------------------------------------------