

OPERATION
FUNCTION
TROUBLE JUDGMENT
PROBABLE CAUSES
DIAGNOSTIC PROCEDURE
STEP 1. Connector check: A-151 glow control unit connector

Q.
Is the check result normal?

STEP 2. Perform voltage measurement at A-151 glow control unit connector.

Q.
Is the check result normal?


STEP 3. Connector check: A-20X engine control relay connector


Q.
Is the check result normal?
STEP 4. Perform resistance measurement at A-151 glow control unit connector.

Q.
Is the check result normal?

STEP 5. Check harness between A-151 (terminal No. 1) glow control unit connector and C-103 (terminal No. 120) engine-ECU connector.


Q.
Is the check result normal?

STEP 6. Check harness between A-151 (terminal No. 9) glow control unit connector and C-103 (terminal No. 126) engine-ECU connector.


Q.
Is the check result normal?

STEP 7. Check harness between A-151 (terminal No. 6) glow control unit connector and A-20X (terminal No. 3) engine control relay connector.


Q.
Is the check result normal?

STEP 8. M.U.T.-III diagnosis code.
Q.
Is the diagnosis code set?


STEP 9. Replace the glow control unit.
Q.
Is the diagnosis code set?


