Inspection Procedure 2: The Rear Room Lamp does not Illuminate Normally.


caution Whenever the ECU is replaced, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.








OPERATION




  • Ignition switch (IG1)
  • Key reminder switch
  • Door switches
  • Front door lock actuator (driver’s side)

COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of the key reminder switch
  • Malfunction of door switch
  • Malfunction of the front door lock actuator (driver’s side)
  • Malfunction of rear room lamp
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE


STEP 1. Front room lamp operation check



Q. Is the check result normal?





STEP 2. Connector check: D-07 rear room lamp connector


Q. Is the check result normal?





STEP 3. Rear room lamp bulb check



Q. Is the check result normal?





STEP 4. Connector check: C-316 ETACS-ECU connector


Q. Is the check result normal?





STEP 5. Wiring harness check between the D-07 rear room lamp connector terminal No. 1/2 and the C-316 ETACS-ECU connector terminal No. 6/5



  • Check the input/output line for open circuit.

Q. Is the check result normal?





STEP 6. Retest the system



Q. Is the check result normal?