Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GZ71
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM (for HV Model): U031857; Software Incompatibility with Brake System Control Module Invalid/Incompatible Software Component; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

DTC

U031857

Software Incompatibility with Brake System Control Module Invalid/Incompatible Software Component

DESCRIPTION

If the vehicle information stored in the forward recognition camera does not match the vehicle information sent from the skid control ECU (brake booster with master cylinder assembly), the forward recognition camera stores DTC U031857.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

U031857

Software Incompatibility with Brake System Control Module Invalid/Incompatible Software Component

The vehicle information sent from the skid control ECU (brake booster with master cylinder assembly) does not match that stored in the forward recognition camera.
  • Electronically controlled brake system
  • Forward recognition camera

Radar Cruise2

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the forward recognition camera, replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle and a DTC may be stored.
  • If the forward recognition camera has been replaced with a new one, it is necessary to perform forward recognition camera adjustment.

    HINT:

    Forward recognition camera adjustment can be performed by using either One Time Recognition or Sequential Recognition.

    One Time Recognition: Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; CRUISE CONTROL: FRONT CAMERA: ADJUSTMENT (ONE TIME RECOGNITION)

    Sequential Recognition: Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; CRUISE CONTROL: FRONT CAMERA: ADJUSTMENT (SEQUENTIAL RECOGNITION)

PROCEDURE

1.

CHECK FOR DTCs

(a) Check for electronically controlled brake system DTCs.

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Proceed to

Electronically controlled brake system DTCs are not output

A

Electronically controlled brake system DTCs are output

B
A

REPLACE FORWARD RECOGNITION CAMERA

B

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM