Part 1

Flasher Timer: The Right or Left Turn-signal Light does not Illuminate

Turn-signal Light Circuit:

Connectors:

TECHNICAL DESCRIPTION (COMMENT)
If the right or left turn-signal light does not illuminate, their bulb may be defective.

TROUBLESHOOTING HINTS
- Malfunction of the turn-signal light bulb
- Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:
- MB991223: Test Harness Set

STEP 1. Check the hazard warning light.

Q: Which turn-signal light does not illuminate?
Front turn-signal light (LH) and side turn-signal light (LH): Go to Step 2.
Front turn-signal light (RH) and side turn-signal light (RH): Go to Step 4.
front turn-signal light (LH): Go to Step 6.
front turn-signal light (RH): Go to Step 12.
side turn-signal light (LH): Go to Step 18.
side turn-signal light (RH): Go to Step 24.
rear combination light (LH): Go to Step 30.
rear combination light (RH): Go to Step 36.
combination meter (LH): Go to Step 42.
combination meter (RH): Go to Step 44.
Combination meter (both right and left): Go to Step 46
LH side only : Refer to Inspection Procedure L-1 "Turn-signal lights does not flash when the turn-signal light switch is turned on."
RH side only : Refer to Inspection Procedure L-1 "Turn-signal lights does not flash when the turn-signal light switch is turned on."
Both LH and RH sides : Refer to Inspection Procedure L-2 "Hazard warning light does not illuminate."







STEP 2. Check front turn-signal light (LH) connector A-16 and ETACS-ECU connector C-226 for damage.

Q: Are front turn-signal light (LH) connector A-16 and ETACS-ECU connector C-226 in good condition?

YES: Go to Step 3.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the turn-signal lights illuminate normally.













STEP 3. Check the wiring harness between front turn-signal light (LH) connector A-16 and ETACS-ECU connector C-226.

NOTE: Also check junction block connector C-210 and intermediate connector C-129. If junction block connector C-210 or intermediate connector C-129 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between front turn-signal light (LH) connector A-16 and ETACS-ECU connector C-226 in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. Check that the turn-signal lights illuminate normally.







STEP 4. Check front turn-signal light (RH) connector A-20 and ETACS-ECU connector C-226 for damage.

Q: Are front turn-signal light (RH) connector A-20 and ETACS-ECU connector C-226 in good condition?

YES: Go to Step 5.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the turn-signal lights illuminate normally.













STEP 5. Check the wiring harness between front turn-signal light (RH) connector A-20 and ETACS-ECU connector C-226.

NOTE: Also check junction block connector C-210 and intermediate connector C-111. If junction block connector C-210 or intermediate connector C-111 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between front turn-signal light (RH) connector A-20 and ETACS-ECU connector C-226 in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. Check that the turn-signal lights illuminate normally.

STEP 6. Check the front turn-signal light bulb (LH).

1. Remove the front turn-signal (LH) light bulb.
2. Check that the front turn-signal light bulb (LH) is not broken.

Q: Is the front turn-signal (LH) light bulb in good condition?

YES: Go to Step 7.

NO: Replace the front turn-signal (LH) light bulb. Check that the turn-signal lights illuminate normally.




STEP 7. Measure at front turn-signal light (LH) connector A-16 in order to check the ground circuit to the front turn-signal light (LH).

1. Disconnect front turn-signal light (LH) connector A-16, and measure at the wiring harness side.
2. Measure the resistance value between terminal 1 and ground.
- The measured value should be 2 Ohm or less.

Q: Does the measured resistance value correspond with this range?

YES: Go to Step 10.

NO: Go to Step 8.




STEP 8. Check front turn-signal light (LH) connector A-16 for damage.

Q: Is the front turn-signal (LH) connector A-16 in good condition?

YES: Go to Step 9.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the turn-signal lights illuminate normally.




STEP 9. Check the wiring harness between front turn-signal light (LH) connector A-16 and ground.

Q: Is the wiring harness between front turn-signal light (LH) connector A-16 and ground in good condition?

YES: Replace the socket. Check that the turn-signal lights illuminate normally.

NO: Repair the wiring harness. Check that the turn-signal lights illuminate normally.







STEP 10. Check front turn-signal light (LH) connector A-16 and ETACS-ECU connector C-226 for damage.

Q: Are front turn-signal light (LH) connector A-16 and ETACS-ECU connector C-226 in good condition?

YES: Go to Step 11.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the turn-signal lights illuminate normally.













STEP 11. Check the wiring harness between front turn-signal light (LH) connector A-16 and ETACS-ECU connector C-226.

NOTE: Also check junction block connector C-210 and intermediate connector C-129. If junction block connector C-210 or intermediate connector C-129 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between front turn-signal light (LH) connector A-16 and ETACS-ECU connector C-226 in good condition?

YES: Replace the socket. Check that the turn-signal lights illuminate normally.

NO: Repair the wiring harness. Check that the turn-signal lights illuminate normally.

STEP 12. Check the front turn-signal light bulb (RH).

1. Remove the front turn-signal (RH) light bulb.
2. Check that the front turn-signal light bulb (RH) is not broken.

Q: Is the front turn-signal (RH) light bulb in good condition?

YES: Go to Step 13.

NO: Replace the front turn-signal (RH) light bulb. Check that the turn-signal lights illuminate normally.




STEP 13. Measure at front turn-signal light (RH) connector A-20 in order to check the ground circuit to the front turn-signal light (RH).

1. Disconnect front turn-signal light (RH) connector A-20, and measure at the wiring harness side.
2. Measure the resistance value between terminal 1 and ground.
- The measured value should be 2 Ohm or less.

Q: Does the measured resistance value correspond with this range?

YES: Go to Step 16.

NO: Go to Step 14.




STEP 14. Check front turn-signal light (RH) connector A-20 for damage.

Q: Is the front turn-signal (RH) connector A-20 in good condition?

YES: Go to Step 15.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the turn-signal lights illuminate normally.




STEP 15. Check the wiring harness between front turn-signal light (RH) connector A-20 and ground.

Q: Is the wiring harness between front turn-signal light (RH) connector A-20 and ground in good condition?

YES: Replace the socket. Check that the turn-signal lights illuminate normally.

NO: Repair the wiring harness. Check that the turn-signal lights illuminate normally.







STEP 16. Check front turn-signal light (RH) connector A-20 and ETACS-ECU connector C-226 for damage.

Q: Are front turn-signal light (RH) connector A-20 and ETACS-ECU connector C-226 in good condition?

YES: Go to Step 17.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the turn-signal lights illuminate normally.













STEP 17. Check the wiring harness between front turn-signal light (RH) connector A-20 and ETACS-ECU connector C-226.

NOTE: Also check junction block connector C-210 and intermediate connector C-111. If junction block connector C-210 or intermediate connector C-111 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between front turn-signal light (RH) connector A-20 and ETACS-ECU connector C-226 in good condition?

YES: Replace the socket. Check that the turn-signal lights illuminate normally.

NO: Repair the wiring harness. Check that the turn-signal lights illuminate normally.

STEP 18. Check the side turn-signal light bulb (LH).

1. Remove the side turn-signal light (LH) bulb.
2. Check that the side turn-signal light bulb (LH) is not broken.

Q: Is the side turn-signal light (LH) bulb in good condition?

YES: Go to Step 19.

NO: Replace the side turn-signal light (LH) bulb. Check that the turn-signal lights illuminate normally.




STEP 19. Measure at side turn-signal light (LH) connector A-02 in order to check the ground circuit to the side turn-signal light (LH).

1. Disconnect side turn-signal light (LH) connector A-02, and measure at the wiring harness side.
2. Measure the resistance value between terminal 1 and ground.
- The measured value should be 2 Ohm or less.

Q: Does the measured resistance value correspond with this range?

YES: Go to Step 22.

NO: Go to Step 20.