Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001SH5P
Model Year Start: 2021 Model: Camry Prod Date Range: [10/2020 -           ]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: U031857; Software Incompatibility with Brake System Control Module Invalid/Incompatible Software Component; 2021 - 2024 MY Camry [10/2020 -        ]

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

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.

  • Vehicle stability control 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.
  • 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 2021 - 2024 MY Camry [10/2020 -        ]; CRUISE CONTROL: FRONT CAMERA: TARGET ADJUSTMENT(ONE TIME RECOGNITION)

    Sequential Recognition: Click here 2021 - 2024 MY Camry [10/2020 -        ]; CRUISE CONTROL: FRONT CAMERA: TARGET ADJUSTMENT(SEQUENTIAL RECOGNITION)

    Driving Adjustment: Click here 2021 - 2024 MY Camry [10/2020 -        ]; CRUISE CONTROL: FRONT CAMERA: DRIVING ADJUSTMENT

PROCEDURE

1.

CHECK FOR DTCs

(a) Check for vehicle stability control system DTCs.

Chassis > Brake > Trouble Codes

Result

Proceed to

Vehicle stability control system DTCs are not output

A

Vehicle stability control system DTCs are output

B

A

REPLACE FORWARD RECOGNITION CAMERA

B

GO TO VEHICLE STABILITY CONTROL SYSTEM

w/ Electric Parking Brake System: Click here 2021 - 2024 MY Camry [10/2020 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM (w/ Electric Parking Brake System): HOW TO PROCEED WITH TROUBLESHOOTING

w/o Electric Parking Brake System: Click here 2021 - 2024 MY Camry [10/2020 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM (w/o Electric Parking Brake System): HOW TO PROCEED WITH TROUBLESHOOTING