

OPERATION
FUNCTION
TROUBLE JUDGEMENT
PROBABLE CAUSES
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III actuator test
Q.
Is the check result normal?


STEP 2. Connector check: A-56 variable geometry control solenoid valve connector

Q.
Is the check result normal?

STEP 3. Perform resistance measurement at A-56 variable geometry control solenoid valve connector.

Q.
Is the check result normal?

STEP 4. Perform voltage measurement at A-56 variable geometry control solenoid valve connector.

Q.
Is the check result normal?


STEP 5. Connector check: A-20X engine control relay connector


Q.
Is the check result normal?
STEP 6. Perform voltage measurement at C-105 engine-ECU connector.

Q.
Is the check result normal?


STEP 7. Connector check: C-105 engine-ECU connector


Q.
Is the check result normal?
STEP 8. Connector check: C-105 engine-ECU connector

Q.
Is the check result normal?

STEP 9. Check harness between A-56 (terminal No. 1) variable geometry control solenoid valve connector and C-105 (terminal No. 17) engine-ECU connector.


Q.
Is the check result normal?

STEP 10. Check harness between A-56 (terminal No. 2) variable geometry control solenoid valve connector and A20X (terminal No. 3) engine control relay connector.


Q.
Is the check result normal?

STEP 11. M.U.T.-III actuator test
Q.
Is the check result normal?



