DTC U1331: Software Incompatibility with Body Control Module "B" [08/2013 - ]: 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.

NG → See step   3 

OK: Go to next step 

1. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .
2. Recheck for DTCs and check if the same DTC is output again.
   RESULT
   
   

   Result	Proceed to
   DTC U1331 is not output	A
   DTC U1331 is output from the blind spot monitor sensor LH (Master)	B
   DTC U1331 is output from the blind spot monitor sensor RH (Slave)	C

B → See step   6 

C → See step   5 

A → See step   4