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DTC B2401 KOS key ID not registered
 
 
caution
  • When replacing the ECU, always check that the communication circuit is normal.
 
 
DIAGNOSIS FUNCTION
If no keyless operation key ID is registered with KOS&OSS-ECU, or a keyless operation key with unregistered ID is used, the KOS&OSS-ECU sets DTC B2401.
 
 
JUDGMENT CRITERIA
If the number of the registered keyless operation keys is 0, or the registration of a keyless operation key fails when the number of the registered keyless operation keys is 0, it is judged as abnormal.
 
 
PROBABLE CAUSES
  • The registration of a keyless operation key ID fails when no keyless operation key ID is 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.
Troubleshoot for the relevant DTC B2400 (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.