

OPERATION
FUNCTION
TROUBLE JUDGMENT
PROBABLE CAUSES
DIAGNOSIS PROCEDURE
STEP 1. Connector check: A-122 detonation sensor connector

Q.
Is the check result normal?

STEP 2. Perform resistance measurement at A-122 detonation sensor connector.

Q.
Is the check result normal?


STEP 3. Connector check: A-08 engine-ECU connector

Q.
Is the check result normal?

STEP 4. Check harness between A-122 (terminal No. 1) detonation sensor connector and A-08 (terminal No. 21) engine-ECU connector.


Q.
Is the check result normal?

STEP 5. Replace detonation sensor.
Q.
Does trouble symptom persist?


STEP 6. Connector check: A-08 engine-ECU connector

Q.
Is the check result normal?

STEP 7. Check harness between A-122 (terminal No. 2) detonation sensor connector and A-08 (terminal No. 20) engine-ECU connector


Q.
Is the check result normal?
