Inspection Procedure 5: Keyless entry system does not work.


caution Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.

OPERATION



PROBABLE CAUSES



  • Malfunction of the key reminder switch
  • Malfunction of the door switches
  • Malfunction of the tailgate latch
  • Malfunction of keyless entry transmitter
  • Malfunction of the WCM
  • Malfunction of ETACS-ECU
  • Damaged wiring harness and connectors
  • Option coding information

DIAGNOSTIC PROCEDURE


STEP 1. ETACS-ECU coding data check


(1)Use M.U.T.-III to read out the option coding information in ETACS-ECU (Refer to GROUP 00 - Precautions before Service - Coding Reference Table ).
(2)Check if the "Keyless function" is "Enabled."

Q. Is the check result normal?





STEP 2. M.U.T.-III CAN bus diagnostics



Q. Is the CAN bus normal?





STEP 3. M.U.T.-III diagnosis code



Q. Is the diagnosis code set?





STEP 4. Check the power supply system




  • Hazard warning lamp

Q. Is the check result normal?





STEP 5. Check the operation of the central door locking system.



Q. Is the check result normal?





STEP 6. M.U.T.-III data list




  • Turn the ignition switch to the LOCK (OFF) position.
  • Remove the ignition key from the ignition key cylinder.
  • Close the driver’s door.
  • Close the front passenger’s doors.
  • Close the RH-side rear door.
  • Close the LH-side rear door.
  • Close the tailgate
Item No.
 Item name
 Normal condition
Item 256
 Dr door ajar switch
 Close
Item 257
 As door ajar switch
 Close
Item 258
 RR door ajar switch
 Close
Item 259
 RL door ajar switch
 Close
Item 260
 Trunk/gate trunk ajar switch
 Close
Item 264
 Handle lock switch
 Key in → Key out
OK: Normal conditions are displayed for all the items.

Q. Is the check result normal?















STEP 7. Retest the system.



Q. Is the check result normal?