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.