WCM sets the diagnosis code No. B1A25 when the received key ID is different from the one registered
in it.
JUDGEMENT CRITERIA
WCM determines that the abnormality is present, if the key ID for the ignition key does
not match the one registered in WCM when the ignition switch is turned ON.
PROBABLE CAUSES
Malfunction of the ignition key
Malfunction of WCM
Accessory key not registered
Accessory WCM not registered
Key is registered to another vehicle
DIAGNOSIS PROCEDURE
STEP 1. Register the key ID and recheck the diagnosis
code.
Register the key ID of the ignition 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 ignition key and recheck the diagnosis code.
Replace the ignition key by which the diagnosis code is set with a new one, register the
key ID of the new key, (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?
Replace WCM and register the ID codes (Refer to ).