

COMMENTS ON TROUBLE SYMPTOM
PROBABLE CAUSES
DIAGNOSIS PROCEDURE
STEP 1. Confirm which turn-signal lamp is defective.
Q.
Which turn-signal lamp fails to illuminate correctly?





STEP 2. Connector check: A-10 and A-11 front combination lamp (turn: LH) connector or A-25 and A-26 front combination lamp (turn: RH) connector.


Q.
Is the check result normal?


STEP 3. Check the bulb(s) of the front turn-signal lamps.
Q.
Is the check result normal?


STEP 4. Resistance measurement at A-11 front combination lamp (turn: LH) connector or A-25 front combination lamp (turn: RH) connector.



Q.
Is the check result normal?


STEP 5. Check the wiring harness from A-11 front combination lamp (turn: LH) connector terminal No.3 or A-25 front combination lamp (turn: RH) connector terminal No.3 to body earth.


Q.
Is the check result normal?



STEP 6. Connector check: B-234 ETACS-ECU connector


Q.
Is the check result normal?


STEP 7. Check the wiring harness from A-10 front combination lamp (turn: LH) connector terminal No.1, A-26 front combination lamp (turn: RH) connector terminal No.1 to B-234 ETACS-ECU connector terminal No.3, No.4.






Q.
Is the check result normal?


STEP 8. Retest the system.
Q.
Is the check result normal?



STEP 9. Connector check: A-07 side turn-signal lamp (LH) connector or A-01 side turn-signal lamp (RH) connector.


Q.
Is the check result normal?


STEP 10. Check the bulb(s) of side turn-signal lamps.
Q.
Is the check result normal?


STEP 11. Resistance measurement at A-07 side turn-signal lamp (LH) connector or A-01 side turn-signal lamp (RH) connector.



Q.
Is the check result normal?


STEP 12. Check the wiring harness from A-07 side turn-signal lamp (LH) connector terminal No.2 or A-01 side turn-signal lamp (RH) connector terminal No.2 and body earth.


Q.
Is the check result normal?


STEP 13. Connector check: B-234 ETACS-ECU connector


Q.
Is the check result normal?


STEP 14. Check the wiring harness from A-07 side turn-signal lamp (LH) connector terminal No.1, A-01 side turn-signal lamp (RH) connector terminal No.1 to B-234 ETACS-ECU connector terminal No.3, No.4.






Q.
Is the check result normal?


STEP 15. Retest the system.
Q.
Is the check result normal?



STEP 16. Connector check: E-01 rear combination lamp (turn: LH) or E-04 rear combination lamp (turn: RH).

Q.
Is the check result normal?


STEP 17. Check the bulb(s) of rear turn-signal lamps.
Q.
Is the check result normal?


STEP 18. Resistance measurement at E-01 rear combination lamp (turn: LH) connector or E-04 rear combination lamp (turn: RH) connector.



Q.
Is the check result normal?


STEP 19. Check the wiring harness from E-01 rear combination lamp (turn: LH) connector terminal No.4 or E-04 rear combination lamp (turn: RH) connector terminal No.2 to body earth.

Q.
Is the check result normal?



STEP 20. Connector check: B-234 ETACS-ECU connector


Q.
Is the check result normal?


STEP 21. Check the wiring harness from E-01 rear combination lamp (turn: LH) connector terminal No.3, E-04 rear combination lamp (turn: RH) connector terminal No.3 to B-234 ETACS-ECU connector terminal or No.3, No.4.



Q.
Is the check result normal?


STEP 22. Retest the system.
Q.
Is the check result normal?



STEP 23. Check the wiring harness from A-26 front combination lamp (turn: RH) connector terminal No.1, A-01 side turn-signal lamp (RH) connector terminal No.1, E-04 rear combination lamp (turn: RH) connector terminal No.6 to B-234 ETACS-ECU connector terminal No.4.






Q.
Is the check result normal?


STEP 24. Check the wiring harness from A-10 front combination lamp (turn: LH) connector terminal No.1, A-07 side turn-signal lamp (LH) connector terminal No.1, E-01 rear combination lamp (turn: LH) connector terminal No.1 to B-234 ETACS-ECU connector terminal No.3.






Q.
Is the check result normal?


STEP 25. Check whether the diagnosis code is reset.
Q.
Is the diagnosis code set?
