Signal Too High

Signal too high

Checking the components and wiring
Check the signal cable. Check for a short-circuit to supply voltage.
Take readings between:
- Engine Control Module (ECM) #A79 (#B19) and knock sensor #3.
Check the ground lead. Check for a short-circuit to supply voltage.
Take readings between:
- Engine control module (ECM) #A31 (#A31) and the knock sensor #4.
Check that the knock sensor (KS) is tightened to the correct torque.

Hint: The diagnostic trouble code (DTC) may be caused by noise from the engine. Start the engine and listen for noise.

Remedy as necessary.

Other information
- Connecting the breakout box, B5254T7 Connecting the Breakout Box, Engine Control Module (ECM)
- Signal specification, B5254T7 Signal Specification
- Checking wiring and terminals Checking Wiring and Terminals









Continue - 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

Attempt New Test - Checking the components and wiring

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