Code No.B2401 Keyless/KOS key ID not registered


caution
  • If the diagnosis code No. B2401 is set, be sure to diagnose the CAN bus line.
  • When replacing the ECU, always check that the communication circuit is normal.

DIAGNOSIS FUNCTION



JUDGMENT CRITERIA



PROBABLE CAUSES



  • Malfunction of CAN bus line
  • The registration of a keyless operation key ID fails when no keyless operation key ID is registered.
  • Malfunction of the keyless operation key
  • Malfunction of KOS-ECU

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics



Q. Is the check result normal?





STEP 2. Register the keyless operation key ID and recheck the diagnosis code.



(1)Turn the ignition switch from the LOCK (OFF) position to the ON position.
(2)Check if the diagnosis code is set.

Q. Is the diagnosis code set?





STEP 3. Replace the keyless operation key and recheck the diagnosis code.



(1)Turn the ignition switch from the LOCK (OFF) position to the ON position.
(2)Check if the diagnosis code is set.

Q. Is the diagnosis code set?