Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001YNVO
Model Year Start: 2022 Model: Avalon Prod Date Range: [08/2021 -           ]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM (for Gasoline Model): U031857; Software Incompatibility with Brake System Control Module Invalid/Incompatible Software Component; 2022 MY Avalon [08/2021 -        ]

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 actuator assembly), the forward recognition camera stores DTC U031857.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

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 actuator assembly) does not match that stored in the forward recognition camera.
  • Electronically controlled brake system
  • Forward recognition camera

Does not come on

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.
  • When the forward recognition camera is replaced with a new one or the windshield glass is replaced or removed/installed, make sure to read Before Starting Adjustment, then perform optical axis alignment for the forward recognition camera and clear the vehicle control history for each system.

    HINT:

    Forward recognition camera axis alignment can be performed by using either One Time Recognition, Sequential Recognition or Driving Adjustment.

    One Time Recognition: Click here 2022 MY Avalon Avalon HV [08/2021 -        ]; CRUISE CONTROL: FRONT CAMERA: TARGET ADJUSTMENT(ONE TIME RECOGNITION)

    Sequential Recognition: Click here 2022 MY Avalon Avalon HV [08/2021 -        ]; CRUISE CONTROL: FRONT CAMERA: TARGET ADJUSTMENT(SEQUENTIAL RECOGNITION)

    Driving Adjustment: Click here 2022 MY Avalon Avalon HV [08/2021 -        ]; CRUISE CONTROL: FRONT CAMERA: DRIVING ADJUSTMENT

PROCEDURE

1.

CHECK FOR DTCs

(a) Check for electronically controlled brake system DTCs.

Chassis > Brake/EPB > 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