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DTC B2401: Keyless/F.A.S.T. key ID not REG.
 
 
cautionWhen replacing the ECU, always check that the communication circuit is normal.
 
 
DIAGNOSTIC FUNCTION
If no keyless operation key ID is registered with KOS-ECU or if the keyless operation key with ID not registered is used, KOS-ECU stores DTC B2401.
 
 
TECHNICAL DESCRIPTION (COMMENT)
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.
 
 
TROUBLESHOOTING HINTS
  • The registration of a keyless operation key ID fails when no keyless operation key ID is registered.
  • Malfunction of the keyless operation key
  • Malfunction of KOS-ECU
 
 
DIAGNOSIS
1. Register the keyless operation key ID and recheck the diagnostic trouble code.
2. Replace the keyless operation key and recheck the diagnostic trouble code.