INSPECTION PROCEDURE 7: Multimode Keyless Entry System Function does not work at All.


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

COMMENTS ON TROUBLE SYMPTOM
If the power windows, the sunroof and the electric-folding door mirrors work normally, ETACS-ECU may be faulty. Also, the operation of the power window (sunroof) interlocked with the keyless entry may have been disabled and the door mirror operation setting is configured for other than the folding/unfolding interlocked with the keyless entry operation, using the customisation function.

PROBABLE CAUSES

  • Malfunction of keyless entry transmitter
  • Malfunction of ETACS-ECU
  • Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE

STEP 1. Confirm the transmitter.
Check that the keyless entry system works normally.

Q. Is the check result normal?
Go to Step 2.
Refer to .

STEP 2. Confirm the operation of the power windows.
Check that the power windows work normally.

Q. Is the check result normal?
Go to Step 3.
Refer to GROUP 42A - Troubleshooting .

STEP 3. Check the operation of sunroof.
Check that the sunroof works normally.

Q. Is the check result normal?
Go to Step 4.
Refer to GROUP 42A - Troubleshooting .

STEP 4. Check the operation of the electric-folding door mirror.
Check that the electric folding door mirrors work normally.

Q. Is the check result normal?
Go to Step 5.
Refer to GROUP 51 - Troubleshooting .

STEP 5. M.U.T.-III diagnosis code
Check whether the WCM-related diagnosis code is set.

Q. Is the diagnosis code set?
Refer to .
Go to Step 6.

STEP 6. Check the customise function.
Use the customisation function to check that the "Multi mode" has been set to one of the followings, not "Disabled."

  • A-spec.
  • C-spec.
  • D-spec.

Q. Is the check result normal?
Go to Step 7.
Use the customisation function to set the "Multi mode" to one of the above, not "Disabled" (Refer to ).

STEP 7. Check of the troubles
Check that the multimode keyless entry system works normally.

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace ETACS-ECU.