Inspection Procedure F-5: One of tail lamps, position lamps or licence plate lamp does not illuminate. <COLT>



caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.




COMMENTS ON TROUBLE SYMPTOM


If the tail lamps, the position lamps or the licence plate lamps do not illuminate, the wiring harness connector(s), the bulb or the fuse may be defective or burned out.

PROBABLE CAUSES



  • Burned-out bulb
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE


STEP 1. Connector check: E-01 rear combination lamp (tail: LH) connector, E-04 rear combination lamp (tail: RH) connector, A-11 front combination lamp (position: LH) connector, A-25 front combination lamp (position: RH) connector or E-14 licence plate lamp connector.





Q. Is the check result normal?

Go to Step 2.

Repair the defective connector.

STEP 2. Check the bulbs of the tail lamps, the position lamps or the licence plate lamp.


Check the bulb of the lamp which does not illuminate.

Q. Is the check result normal?

Go to Step 3.
Replace the bulb of the lamp which does not illuminate.

STEP 3. Resistance measurement at E-01 rear combination lamp (tail: LH) connector, E-04 rear combination lamp (tail: RH) connector, A-11 front combination lamp (position: LH) connector, A-25 front combination lamp (position: RH) connector or E-14 licence plate lamp connector.





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




(2)Check the resistance between the lamp connector and body earth.

  • Resistance between A-11 front combination lamp (position: LH) connector terminal No.3 and body earth
  • Resistance between A-25 front combination lamp (position: RH) connector terminal No.3 and body earth
  • Resistance between E-01 rear combination lamp (tail: LH) connector terminal No.4 and body earth
  • Resistance between E-04 rear combination lamp (tail: RH) connector terminal No.2 and body earth
  • Resistance between E-14 licence plate lamp (LH) connector terminal No.1 and body earth
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 5.

Go to Step 4.

STEP 4. Check the wiring harness from E-01 rear combination lamp (tail: LH) connector terminal No.4, E-04 rear combination lamp (tail: RH) connector terminal No.2, A-11 front combination lamp (position: LH) connector terminal No.3, A-25 front combination lamp (position: RH) connector terminal No.3 or E-14 licence plate lamp connector terminal No.1 to body earth.






  • Check the earth wires for open circuit.

Q. Is the check result normal?

Go to Step 5.

Repair the wiring harness.

STEP 5. Connector check: B-234 ETACS-ECU connector




Q. Is the check result normal?

Go to Step 6.

Repair the defective connector.

STEP 6. Check the wiring harness from E-01 rear combination lamp (tail: LH) connector terminal No.1, E-04 rear combination lamp (tail: RH) connector terminal No.5, A-11 front combination lamp (position: LH) connector terminal No.1, A-25 front combination lamp (position: RH) connector terminal No.1 or E-14 licence plate lamp connector terminal No.2 to B-234 ETACS-ECU connector terminal No.15.









note Prior to the wiring harness inspection, check junction block connectors B-228 <tail lamp or licence plate lamp>, B-212 <position lamp (LH)> and B-210 <position lamp (RH)>, and repair if necessary.

  • Check the output lines for open circuit.

Q. Is the check result normal?

Go to Step 7.

Repair the wiring harness.

STEP 7. Retest the system.


Check that the tail/stop lamps, the position lamps and the licence plate lamps 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 tail lamps do not illuminate : Replace the tail lamp socket.
When the position lamps do not illuminate : Replace the position lamp socket.
When the licence plate lamps do not illuminate : Replace the licence plate lamp socket.