U1331

PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: U1331: Software Incompatibility with Body Control Module "B"
U1331 - Software Incompatibility with Body Control Module "B"

DESCRIPTION

This DTC is stored when the destination information of the main body ECU (multiplex network body ECU) does not match that of the blind spot monitor sensors.





INSPECTION PROCEDURE

NOTICE:
When checking for DTCs, make sure that the blind spot monitor main switch (warning canceling switch assembly) is on.

PROCEDURE

1. CONFIRM PART NUMBER (MAIN BODY ECU)

(a) Check the main body ECU part number.

(1) Check if the part number of the main body ECU installed on the vehicle is correct.

OK:

The parts number is correct.

NG -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal
OK -- Continue to next step.

2. CHECK DTC

(a) Clear the DTCs Blind Spot Monitor System.

(b) Recheck for DTCs and check if the same DTC is output again.

Result:





B -- REPLACE BLIND SPOT MONITOR SENSOR RH

C -- REPLACE BLIND SPOT MONITOR SENSOR LH

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting