[Previous][Next]
DTC B2401: Keyless/KOS key ID not registered
 
 
cautionWhen replacing the ECU, always check that the communication circuit is normal.
 
 
DTC SET CONDITION
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
STEP 1. Register the keyless operation key ID and recheck the diagnostic trouble code.
Register the keyless operation key ID (refer to ), and check whether the DTC is stored again.
(1) Turn the power supply mode of the engine switch from OFF to ON.
(2) Check if the DTC is stored.
Is the DTC stored?
Go to Step 2.
The procedure is complete.
 
STEP 2. Replace the keyless operation key and recheck the diagnostic trouble code.
Replace the keyless operation key for which the DTC is stored with a new one, register the encrypted code and keyless operation key ID (refer to ), and check whether the DTC is stored again.
(1) Turn the power supply mode of the engine switch from OFF to ON.
(2) Check if the DTC is stored.
Is the DTC stored?
Replace KOS-ECU and register the ID codes (Refer to ).
The procedure is complete.