

OPERATION
FUNCTION
TROUBLE JUDGMENT
PROBABLE CAUSES
DIAGNOSIS PROCEDURE
STEP 1. Connector check: C-24 oxygen sensor (rear) connector

Q.
Is the check result normal?

STEP 2. Perform resistance measurement at C-24 oxygen sensor (rear) connector.

Q.
Is the check result normal?

STEP 3. Perform voltage measurement at C-24 oxygen sensor (rear) connector.

Q.
Is the check result normal?


STEP 4. Connector check: B-206 engine control relay connector


Q.
Is the check result normal?
STEP 5. Perform voltage measurement at A-09 engine-ECU connector.

Q.
Is the check result normal?


STEP 6. Connector check: A-09 engine-ECU connector

Q.
Is the check result normal?

STEP 7. Check harness between C-24 (terminal No. 3) oxygen sensor (rear) connector and A-09 (terminal No. 94) engine-ECU connector.


Q.
Is the check result normal?

STEP 8. Connector check: A-09 engine-ECU connector

Q.
Is the check result normal?

STEP 9. Check harness between C-24 (terminal No. 4) oxygen sensor (rear) connector and B-206 (terminal No. 4) engine control relay connector.


Q.
Is the check result normal?

STEP 10. Check harness between C-24 (terminal No. 3) oxygen sensor (rear) connector and A-09 (terminal No. 94) engine-ECU connector.


Q.
Is the check result normal?

STEP 11. M.U.T.-III diagnosis code.
Q.
Is the diagnosis code set?

