Code No.B1A24 Key ID not registered
caution
When the diagnosis code No. B1A24 is set, be sure to diagnose the CAN bus line.
When replacing the ECU, always check that the communication circuit is normal.
DIAGNOSIS FUNCTION
KOS-ECU sets the diagnosis code No. B1A24 when the key ID was not registered in it.
JUDGMENT CRITERIA
KOS-ECU determines that the abnormality is present, if the key ID is not registered in it when the ignition switch is turned ON.
PROBABLE CAUSES
Malfunction of CAN bus line
Key ID not registered
Malfunction of KOS-ECU
DIAGNOSIS PROCEDURE
1.
M.U.T.-III CAN bus diagnostics
2.
Register the key ID and recheck the diagnosis code.