Inspection Procedure 12: One of the position lamps, the licence plate lamps or the tail lamps does not illuminate.


COMMENTS ON TROUBLE SYMPTOM


If one of the position lamps, the licence plate lamps or tail lamps does not illuminate normally, the harness, connector(s), or bulb(s) may have a problem, or the fuse may be burned out.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Bulb check


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

Q. Is the check result normal?

Go to Step 2.

NO : Replace the bulb(s) of the lamp that does not illuminate.

STEP 2. Resistance measurement at the headlamp assembly (position: LH) or (position: RH) connector, rear combination lamp (tail: LH) or (tail: RH) connector, licence plate lamp (LH) or (RH) connector (earth terminal).


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between the connector terminal of lamp which does not illuminate and the body earth.

  • Measure the resistance between the headlamp assembly (position: LH) or (position: RH) connector (earth terminals) and body earth.
  • Measure the resistance between the rear combination lamp (tail: LH) or (tail: RH) connector (earth terminals) and body earth.
  • Measure the resistance between the licence plate lamp (LH) or (RH) connector (earth terminals) and body earth.
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 4.

Go to Step 3.

STEP 3. Check of open circuit in earth lines between the headlamp assembly (position: LH) or (position: RH) connector, rear combination lamp (tail: LH) or (tail: RH) connector, licence plate lamp (LH) or (RH) connector and body earth.


Q. Is the check result normal?

Go to Step 5.

Repair the connector(s) or wiring harness.

STEP 4. Check of open circuit in (TAL1, TAR1, TAL2, TAR2) lines between the headlamp assembly (position: LH) or (position: RH) connector, rear combination lamp (tail: LH) or (tail: RH) connector, licence plate lamp (LH) or (RH) connector and ETACS-ECU connector.


Q. Is the check result normal?

Go to Step 5.

Repair the connector(s) or wiring harness.

STEP 5. Retest the system


Check that the position lamp, tail lamp and licence plate lamp illuminate normally.

Q. Is the check result normal?

The lamps illuminate normally at both high and low beams. : The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

When the position lamps do not illuminate : Replace the position lamp socket.

When the tail lamps do not illuminate : Replace the rear combination lamp socket.

When the licence plate lamps do not illuminate : Replace the licence plate lamp socket.