Code No.B2400 KOS key registration fail


caution
  • If the diagnosis code No. B2400 is set, diagnose the CAN bus lines.
  • When replacing the ECU, always check that the communication circuit is normal.

DIAGNOSIS FUNCTION



JUDGEMENT CRITERIA



PROBABLE CAUSES



  • At the registration, there is an object near the keyless operation key which interferes with the communication.
  • Wrong keyless operation key registration method
  • Failure of keyless operation key code registration
  • Battery drain of keyless operation key
  • Malfunction of the keyless operation key
  • Malfunction of CAN bus line
  • Malfunction of KOS-ECU

DIAGNOSIS PROCEDURE


STEP 1. Interference check at keyless operation key registration



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





STEP 2. Check of keyless operation key registration method



Q. Is the check result normal?





STEP 3. M.U.T.-III CAN bus diagnostics



Q. Is the check result normal?





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



Q. Is the diagnosis code set?





STEP 5. Replace the battery in the keyless operation key and recheck the diagnosis code.



(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?





STEP 6. Replace the keyless operation key and recheck the diagnosis code.



(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?