Inspection Procedure 14: Knocking


COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

Q. Is diagnosis code set?
Inspection chart for diagnosis code (Refer to ).
Go to Step 2.

STEP 2. Visual check of ignition spark.

  • Remove the spark plug and install it to the ignition coil.
  • Connect the ignition coil connector.
  • Disconnect all injector connectors.
  • At the engine start, check each spark plug produces a spark.

Q. Is the check result normal?
Check detonation sensor system. Check code No.P0327: detonation sensor circuit low input (Refer to ). Check code No.P0328: detonation sensor circuit high Input (Refer to ).
Check Inspection Procedure - ignition circuit system (Refer to ).