Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Software Incompatibility with Body Control Module Not Programmed (U032251,U032257)

Toyota Corolla Cross (2022-2025) Service Manual / Audio & Visual & Telematics / Park Assist / Monitoring / Blind Spot Monitor System / Software Incompatibility with Body Control Module Not Programmed (U032251,U032257)

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 No.

Detection Item

DTC Detection Condition

Trouble Area

U032251

Software Incompatibility with Body Control Module Not Programmed

Destination information of the main body ECU and blind spot monitor sensor do not match
  • Main body ECU (multiplex network body ECU)
  • Blind spot monitor sensor LH (B)

U032257

Software Incompatibility with Body Control Module Invalid/Incompatible Software Component

Destination information of the main body ECU and blind spot monitor sensor do not match
  • Main body ECU (multiplex network body ECU)
  • Blind spot monitor sensor LH (B)

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U032251

Software Incompatibility with Body Control Module Not Programmed

Destination information of the main body ECU and blind spot monitor sensor do not match
  • Main body ECU (multiplex network body ECU)
  • Blind spot monitor sensor RH (A)

U032257

Software Incompatibility with Body Control Module Invalid/Incompatible Software Component

Destination information of the main body ECU and blind spot monitor sensor do not match
  • Main body ECU (multiplex network body ECU)
  • Blind spot monitor sensor RH (A)

CAUTION / NOTICE / HINT

NOTICE:

  • When checking for DTCs, make sure that the blind spot monitor system is turned on.
  • Before replacing the main body ECU (multiplex network body ECU), refer to the Service Bulletin.

PROCEDURE

1.

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

(a) 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 to the vehicle is correct.

OK:

The part number is correct.

NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

OK

2.

CHECK DTC

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

Body Electrical > Blind Spot Monitor "B" > Trouble Codes

Result

Proceed to

DTCs are not output

A

U032251 or U032257 is output

B

None of the above conditions are met

C
B

REPLACE BLIND SPOT MONITOR SENSOR LH (B)

C

GO TO DTC CHART
A

3.

CHECK DTC

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

Body Electrical > Blind Spot Monitor "A" > Trouble Codes

Result

Proceed to

DTCs are not output

A

U032251 or U032257 is output

B

None of the above conditions are met

C
A

USE SIMULATION METHOD TO CHECK

B

REPLACE BLIND SPOT MONITOR SENSOR RH (A)

C

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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