

OPERATION
FUNCTION
TROUBLE JUDGMENT
PROBABLE CAUSES
DIAGNOSIS PROCEDURE
STEP 1. Connector check: A-143 fuel filter pressure switch connector

Q.
Is the check result normal?

STEP 2. Check the fuel filter pressure switch itself.

Q.
Is the check result normal?

STEP 3. Perform voltage measurement at A-143 fuel filter pressure switch connector.

Q.
Is the check result normal?


STEP 4. Connector check: C-103 engine-ECU connector

Q.
Is the check result normal?

STEP 5. Check harness between A-143 (terminal No. 1) fuel filter pressure switch connector and C-103 (terminal No. 110) engine-ECU connector.


Q.
Is the check result normal?

STEP 6. M.U.T.-III data list


Q.
Is the check result normal?



STEP 7. Perform resistance measurement at A-143 fuel filter pressure switch connector.

Q.
Is the check result normal?

STEP 8. Connector check: C-103 engine-ECU connector

Q.
Is the check result normal?

STEP 9. Check harness between A-143 (terminal No. 1) fuel filter pressure switch connector and C-103 (terminal No. 110) engine-ECU connector.

