42B-B1A24 Key ID not registered

DTC B1A24: Key ID not registered

caution

When DTC B1A24 is stored, be sure to diagnose the CAN bus line.
When replacing the ECU, always check that the communication circuit is normal.

DTC SET CONDITION

KOS-ECU stores DTC B1A24 when the key ID was not registered in it.

TECHNICAL DESCRIPTION (COMMENT)

KOS-ECU determines that the abnormality is present, if the key ID is not registered in it when the power supply mode of the engine switch is turned ON.

TROUBLESHOOTING HINTS

Key ID not registered
Malfunction of the keyless operation key
Malfunction of KOS-ECU

DIAGNOSIS

STEP 1. Using scan tool (M.U.T-III), diagnose the CAN bus line.

(1)

caution

To prevent damage to scan tool (M.U.T-III), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (M.U.T-III).

Connect scan tool (M.U.T-III). Refer to "How to connect scan tool (M.U.T.-III)

(2) Turn the power supply mode of the engine switch to ON.

(3) Diagnose the CAN bus line.

(4) Turn the power supply mode of the engine switch to OFF.

Is the CAN bus line found to be normal?

Go to Step 2

Repair the CAN bus line (Refer to GROUP 54C, Diagnosis

STEP 2. Register the key ID and recheck the diagnostic trouble code.

), and recheck if the DTC is stored.

(1) Turn the power supply mode of the engine switch from OFF to ON.

(2) Check if the DTC is stored.

Is the diagnostic trouble code stored?

Replace KOS-ECU and register the ID codes (Refer to

The procedure is complete.