Inspection Procedure 3: The key reminder switch signal is not received.


caution Whenever the ECU is replaced, ensure that the input signal circuit is normal.










COMMENTS ON TROUBLE SYMPTOM




  • Electric motor reminder
  • Central door locking
  • Keyless entry system
  • Room lamp

PROBABLE CAUSES



  • Malfunction of the key reminder switch
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE


STEP 1. Connector check: B-203 key reminder switch connector


Q. Is the check result normal?





STEP 2. Check the key reminder switch.



Q. Is the check result normal?





STEP 3. Resistance measurement at the B-203 key reminder switch connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Resistance between B-203 key reminder switch connector terminal No.6 and body earth
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?





STEP 4. Check the wiring harness between B-203 key reminder switch connector (terminal 6) and the body earth.


note Prior to the wiring harness inspection, check joint connector B-04 and earth onnector B-11 repair if necessary.

  • Check the earth wires for open circuit.

Q. Is the check result normal?





STEP 5. Connector check: B-317 ETACS-ECU connector


Q. Is the check result normal?





STEP 6. Check the wiring harness between B-317 ETACS-ECU connector (terminal 53) and B-203 key reminder switch connector (terminal 3).



  • Check the input line for open circuit or short circuit.

Q. Is the check result normal?





STEP 7. M.U.T.-III data list




  • Electric motor switch: "LOCK" (OFF) (key inserted)
Item No.
 Item name
 Normal condition
28
 Steering lock switch
 OFF
OK: Normal condition is displayed.

Q. Is the check result normal?