DTC B1A24 Transponder ID not registered
caution
When replacing the ECU, always check that the communication circuit is normal.
DIAGNOSIS FUNCTION
KOS&OSS-ECU sets DTC B1A24 when the key ID was not registered in it.
JUDGMENT CRITERIA
KOS&OSS-ECU determines that the abnormality is present, if the key ID is not registered in it when the engine switch is turned ON.
PROBABLE CAUSES
Key ID not registered
Malfunction of KOS&OSS-ECU
DIAGNOSIS
STEP 1. Register the key ID.
Refer to the separate manual "How to register an ID" to register the keyless operation key ID.
Is the key ID registration complete?
Go to Step 2
.
Perform troubleshooting (Refer to
).
STEP 2. Check whether the DTC is set again.
Check again if the DTC is set in the KOS&OSS-ECU.
Is the DTC set?
Replace KOS&OSS-ECU and register the ID codes (Refer to
).
The diagnosis is complete.
![[Previous]](../../../buttons/fprev.png)
![[Next]](../../../buttons/fnext.png)
Go to Step 2
.
Perform troubleshooting (Refer to ).Replace KOS&OSS-ECU and register the ID codes (Refer to ).The diagnosis is complete.