42C-B1761 VIN code not programmed

DTC B1761: VIN code not programmed

caution

When the 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

WCM sets DTC B1761 when no VIN is recorded in it.

TECHNICAL DESCRIPTION (COMMENT)

WCM determines that the abnormality is present when no VIN is recorded in it.

TROUBLESHOOTING HINTS

VIN not programmed
Malfunction of the WCM

DIAGNOSIS

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

(1)

caution

To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).

Connect scan tool MB991958. Refer to "How to connect the Scan Tool (M.U.T.-III)

(2) Turn the ignition switch to the "ON" position.

(3) Diagnose the CAN bus line.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

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 VIN and recheck the diagnostic trouble code.

) and recheck if the DTC is set.

(1) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.

(2) Check if DTC is set.

(3) Turn the ignition switch to the "LOCK" (OFF) position.

Is the DTC set?

Replace WCM and register the ID codes (Refer to

The procedure is complete.