
FUNCTION
TROUBLE JUDGMENT
PROBABLE CAUSES
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
Q.
Is any other diagnosis code than P0170 output?


STEP 2. M.U.T.-III data list


Q.
Are the check results normal?


STEP 3. Check throttle body (throttle valve portion) for contamination.
Q.
Is the check result normal?


STEP 4. Check for intake of air from gaps in gasket, seals, etc.
Q.
Is the check result normal?

STEP 5. Check for leakage of exhaust emission from exhaust manifold.
Q.
Is the check result normal?

STEP 6. Connector check: Injector connectors

Q.
Are the check results normal?

STEP 7. Check injector itself.


Q.
Is the check result normal?

STEP 8. Connector check: B-206 engine control relay connector and A-08 engine-ECU connector


Q.
Is the check result normal?

STEP 9. Check harness between B-206 engine control relay connector and injector connectors.


note | Before checking harness, check intermediate connectors A-13 and B-212, and repair if necessary. |
Q.
Are the check results normal?

STEP 10. Check harness between injector connectors and A-08 engine-ECU connector.


Q.
Are the check results normal?

STEP 11. Check purge control solenoid valve itself.


Q.
Is the check result normal?

STEP 12. Fuel pressure measurement.


Q.
Is the check result normal?
