Inspection Procedure 9

Inspection Procedure 9: One of the rear side marker lights, position light or the license plate lights does not Illuminate.






























TECHNICAL DESCRIPTION (COMMENT)

If one of the rear side marker lights, the position lights or the license plate lights does not Illuminate, the harness, connector(s), or bulb(s) may have a problem, or the fuse may be burned out.

TROUBLESHOOTING HINTS

- Malfunction of bulbs
- Malfunction of license plate light
- Malfunction of headlight
- Malfunction of rear side marker light
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS

Required Special Tools:

- MB992006: Extra fine probe
- MB991223: Harness set

STEP 1. Rear combination light (taillight) check.

Q. Does the rear combination light (taillight) illuminate normally?

YES Go to Step 2.
NO Check the taillight (Refer to trouble symptom chart Symptom Chart).
STEP 2. Check headlight assembly connector A-40 (position light-LH) or A-57 (position light-RH), rear side marker light connector F-24 (LH) or F-07 (RH) or license plate light connector F-18 (LH) or F-15 (RH) for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q. Is headlight assembly connector A-40 (position light-LH) or A-57 (position light-RH), rear side marker light connector F-24 (LH) or F-07 (RH) or license plate light connector F-18 (LH) or F-15 (RH) in good condition?

YES Go to Step 3.
NO Repair or replace the damaged component(s). Harness Connector Inspection.
STEP 3. Bulb check.

Check the bulb(s) of the light that does not illuminate.

Q. Is the check result normal?

YES Go to Step 4.
NO Replace the bulb(s) of the light that does not illuminate.
STEP 4. Resistance measurement at headlight assembly connector A-40
(position light-LH) or A-57 (position light-RH), rear side marker light connector F-24 (LH) or F-07 (RH) or license plate light connector F-18 (LH) or F-15 (RH).

(1)Disconnect the connector, and measure at the wiring harness side.













(2)Measure the resistance between the connector of light which does not illuminate and the body ground.

- Measure the resistance between headlight assembly connector A-40 (LH) or A-57 (RH) (terminal 6) and body ground.
- Measure the resistance between rear side marker light connector F-24 (LH) or F-07 (RH) (terminal 1) and body ground.
- Measure the resistance between license plate light connector F-18 (LH) or F-15 (RH) (terminal 1) and body ground.
OK: The measured value should be continuity exists (2ohms or less).

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

YES Go to Step 6.

NO Go to Step 5.

STEP 5. Check the wiring harness between headlight assembly connector, rear side marker light connector or license plate light connector and the body ground.

Check the ground line for open circuit.

- Check the wiring harness between headlight assembly (LH) connector A-40 (terminal 6) and the body ground.[ position light-LH]
- Check the wiring harness between headlight assembly (RH) connector A-57 (terminal 6) and the body ground.[ position light-RH]
- Check the wiring harness between rear side marker light (LH) connector F-24 (terminal 1) and the body ground.[ rear side marker light-LH]
NOTE:
Also check intermediate connector F-27 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-27 is damaged, repair or replace the connector as described in Harness Connector Inspection Harness Connector Inspection .

- Check the wiring harness between rear side marker light (RH) connector F-07 (terminal 1) and the body ground.[ rear side marker light-RH]
NOTE:
Also check intermediate connector F-27 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-27 is damaged, repair or replace the connector as described in Harness Connector Inspection Harness Connector Inspection .

- Check the wiring harness between license plate light (LH) connector F-18 (terminal 1) and the body ground.[ license plate light-LH]
- Check the wiring harness between license plate light (RH) connector F-15 (terminal 1) and the body ground.[ license plate light-RH]

Q. Is the wiring harness between headlight assembly connector, rear side marker light connector or license plate light connector and the body ground in good condition?

YES Go to Step 8.
NO Repair the wiring harness.
STEP 6. Check ETACS-ECU connector C-304 [position light] or C-311 [rear side marker light or license plate light] for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q. Is ETACS-ECU connector C-304[ position light] or C-311[ rear side marker light or license plate light] in good condition?

YES Go to Step 7.
NO Repair the damaged parts.
STEP 7. Check wiring harness between headlight assembly connector, rear side marker light connector or license plate light connector and ETACS-ECU connector.

Check the ground line for open circuit.

- Check the wiring harness between headlight assembly (LH) connector A-40 (terminal 4) and ETACS-ECU connector C-304 (terminal 3).[ position light-LH]
- Check the wiring harness between headlight assembly (RH) connector A-57 (terminal 4) and ETACS-ECU connector C-304 (terminal 7).[ position light-RH]
- Check the wiring harness between rear side marker light (LH) connector F-24 (terminal 2) and ETACS-ECU connector C-311 (terminal 10).[ rear side marker light-LH]
NOTE:
Also check intermediate connectors D-17 and F-27 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-17 or F-27 is damaged, repair or replace the connector as described in Harness Connector Inspection Harness Connector Inspection .

- Check the wiring harness between rear side marker light (RH) connector F-07 (terminal 2) and ETACS-ECU connector C-311 (terminal 13).[ rear side marker light-RH]
NOTE:
Also check intermediate connectors D-17 and F-27 and joint connector C-43 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-17 or F-27 or joint connector C-43 is damaged, repair or replace the connector as described in Harness Connector Inspection Harness Connector Inspection .

- Check the wiring harness between license plate light (LH) connector F-18 (terminal 2) and ETACS-ECU connector C-311 (terminal 10).[ license plate light-LH]
NOTE:
Also check intermediate connectors D-17 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-17 is damaged, repair or replace the connector as described in Harness Connector Inspection Harness Connector Inspection .

- Check the wiring harness between license plate light (RH) connector F-15 (terminal 2) and ETACS-ECU connector C-311 (terminal 10).[ license plate light-RH]
NOTE:
Also check intermediate connectors D-17 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-17 is damaged, repair or replace the connector as described in Harness Connector Inspection Harness Connector Inspection .

Q. Is the wiring harness between headlight assembly connector, rear side marker light connector or license plate light connector and ETACS-ECU connector in good condition?

YES Go to Step 8.
NO Repair the wiring harness.
STEP 8. Retest the system.

Check that the position light, rear side marker light, or license plate light illuminate normally.

Q. Do the position light, rear side marker light, or license plate light work normally?

YES (The light illuminate normally at both high and low beams.) : The trouble can be an intermittent malfunction How to Cope With Intermittent Malfunctions).
NO [When the position light does not illuminate] : Replace the position light socket.
NO [When the license plate light does not illuminate] : Replace the license plate light socket.
NO [When the rear side marker lights do not illuminate] : Replace the rear side maker light socket.