KOS-ECU sets the diagnosis code No. B1A24 when the key ID was not registered in it.
JUDGEMENT 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
Key ID not registered
Malfunction of the emergency key
Malfunction of KOS-ECU
DIAGNOSIS PROCEDURE
STEP 1. Register the key ID and recheck the diagnosis
code.
Register the key ID of the emergency key by which the diagnosis code is set (refer to ),
and recheck if the diagnosis code is set.
(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?
Go to Step 2.
The diagnosis is complete.
STEP 2. Replace the emergency key and recheck the diagnosis code.
Replace the emergency key for which the diagnosis code is set with a new one, register
the key ID and keyless operation key ID (refer to ), and check whether
the diagnosis code is reset.
(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?
Replace KOS-ECU and register the ID codes (Refer to ).
Go to Step 2.
The diagnosis is complete.