Inspection Procedure 2: The keyless operation key cannot be registered using the M.U.T.-III.


caution Before replacing the ECU, ensure that the communication circuit is normal.

COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Insufficient insertion of keyless operation key into key slot
  • CAN communication error with OSS-ECU
  • OSS-ECU key code not registered
  • Malfunction of the keyless operation key
  • Malfunction of KOS-ECU
  • Keyless operation key already registered to another vehicle

DIAGNOSIS PROCEDURE


STEP 1. Sufficiently insert the keyless operation key into the key slot, and then check the trouble symptom.



Q. Is the check result normal?





STEP 2. Interference check of keyless operation key when it is inserted in the key slot



Q. Are there other keys or anything that interferes with the communication?





STEP 3. Retest the system



Q. Is the check result normal?





STEP 4. M.U.T.-III diagnosis code



Q. Is the diagnosis code set?





STEP 5. M.U.T.-III other system diagnosis code



Q. Is the diagnosis code set?





STEP 6. Check which keyless operation key cannot be registered.


Q. Can any one of the keyless operation keys be registered?





STEP 7. Retest the system



Q. Is the error message of M.U.T.-III screen "Abnormality in key"?





STEP 8. Retest the system



Q. Is the check result normal?





STEP 9. Check whether the diagnosis code is reset.


(1)Turn the power supply mode of the engine switch from OFF to ON.
(2)Check if the diagnosis code is set.

Q. Is the diagnosis code set?