Dtc U1331 Software Incompatibility With Body Control Module B


DESCRIPTION

INSPECTION PROCEDURE

CONFIRM PART NUMBER (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])

CHECK DTC

DTC 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.

DTC Code
DTC Detection Condition
Trouble Area
U1331
Destination information of the main body ECU (multiplex network body ECU) and blind spot monitor sensor do not match.
  1. Main body ECU (multiplex network body ECU)
  2. Blind spot monitor sensor LH
  3. Blind spot monitor sensor RH

INSPECTION PROCEDURE

NOTICE:
When checking for DTCs, make sure that the blind spot monitor main switch assembly (multi-function switch) is on.
1.CONFIRM PART NUMBER (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])

  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
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
OK


2.CHECK DTC

  1. Clear the DTCs (LandCruiser RM000004RS201SX.html).

  1. 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



B
REPLACE BLIND SPOT MONITOR SENSOR LH (LandCruiser RM00000470F01GX.html)

C
REPLACE BLIND SPOT MONITOR SENSOR RH (LandCruiser RM00000470F01GX.html)
A

USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)