Inspection Procedure 2: Any of Tail Lamps does not Illuminate.



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




COMMENTS ON TROUBLE SYMPTOM


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

PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. Connector check: F-04 rear combination lamp (tail: LH) connector or F-02 rear combination lamp (tail: RH) connector



Q. Is the check result normal?

Go to Step 2.

Repair the defective connector.

STEP 2. Check the bulbs of the tail lamps.


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 the F-04 rear combination lamp (tail: LH) connector or F-02 rear combination lamp (tail: RH) 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 F-04 rear combination lamp (tail: LH) connector terminal No.5 and body earth
  • Resistance between F-02 rear combination lamp (tail: RH) connector terminal No.5 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 F-04 rear combination lamp (tail: LH) connector terminal No.5 or F-02 rear combination lamp (tail: RH) connector terminal No.5 to body earth.



note Prior to the wiring harness inspection, check intermediate connector F-07, and repair if necessary.

  • 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: C-218 ETACS-ECU connector




Q. Is the check result normal?

Go to Step 6.

Repair the defective connector.

STEP 6. Check the wiring harness from F-04 rear combination lamp (tail: LH) connector terminal No.3 or F-02 rear combination lamp (tail: RH) connector terminal No.3 to C-218 ETACS-ECU connector terminal No.15.







note Prior to the wiring harness inspection, check junction block connector C-221 <L.H. drive vehicles>, C-204 <R.H. drive vehicles>, intermediate connectors C-31 <R.H. drive vehicles> and F-07, 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 illuminate normally.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the tail lamp socket.