Keyless Operation System (KOS)

DTC B1761: VIN code not programmed

CAUTION:

- When DTC No. B1761 is set, 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 sets DTC B1761 when no VIN is recorded in it.

TECHNICAL DESCRIPTION (COMMENT)

KOS-ECU determines that the abnormality is present when no VIN is recorded in it.

TROUBLESHOOTING HINTS

- VIN not programmed
- Malfunction of the KOS-ECU

DIAGNOSIS

STEP 1. Using scan tool MB991958, diagnose the CAN bus line.

(1)
CAUTION:
To prevent damage to scan tool (MB991958), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (MB991958).

Connect scan tool MB991958. Refer to "How to connect scan tool (M.U.T.-III) Reading and Clearing Diagnostic Trouble Codes."

(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.

Q. Is the CAN bus line found to be normal?

YES Go to Step 2.
NO Repair the CAN bus line CAN Bus Diagnostics Chart).
STEP 2. Register the VIN and recheck the diagnostic trouble code.

Register VIN in KOS-ECU Testing and Inspection) and recheck if the DTC is set.

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

(2)Check if DTC is set.

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

Q. Is the DTC set?

YES Replace KOS-ECU and register the ID codes (Refer to ID Codes Registration Procedure).
NO The procedure is complete.