DTC U1331: Software Incompatibility with Body Control Module "B" [10/2014 - ]: Procedure

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

      OK

      The part number is correct.

Result: 

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

(Refer to REMOVAL [10/2014 - ] )

Result: 

OK 

See step  2

1. Clear the DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] ).
2. Recheck for DTCs and check if the same DTC is output again.

   Result

   Result	Proceed to
   No DTC is output	A
   DTC is output from the blind spot monitor sensor LH (Master)	B
   DTC is output from the blind spot monitor sensor RH (Slave)	C

Result: 

A 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 10/2015] Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] )

Result: 

B 

REPLACE BLIND SPOT MONITOR SENSOR LH 

(Refer to REMOVAL [10/2014 - ] )

Result: 

C 

REPLACE BLIND SPOT MONITOR SENSOR RH 

(Refer to REMOVAL [10/2014 - ] )