Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001RX11
Model Year Start: 2021 Model: Camry HV Prod Date Range: [10/2020 -           ]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: U031851; Software Incompatibility with Brake System Control Module Not Programmed; 2021 - 2024 MY Camry HV [10/2020 -        ]

DTC

U031851

Software Incompatibility with Brake System Control Module Not Programmed

DESCRIPTION

If the forward recognition camera cannot verify the vehicle information sent from the skid control ECU (brake booster with master cylinder assembly), the forward recognition camera stores DTC U031851.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

U031851

Software Incompatibility with Brake System Control Module Not Programmed

The vehicle information sent from the skid control ECU (brake booster with master cylinder assembly) cannot be verified by the forward recognition camera.

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 HV [10/2020 -        ]; CRUISE CONTROL: FRONT CAMERA: TARGET ADJUSTMENT(ONE TIME RECOGNITION)

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

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

PROCEDURE

1.

REPLACE FRONT CAMERA SYSTEM

(a) Replace the forward recognition camera with a new one.

Click here 2021 - 2024 MY Camry HV [10/2020 -        ]; CRUISE CONTROL: FRONT CAMERA: REMOVAL

(b) Perform forward recognition camera adjustment.

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 HV [10/2020 -        ]; CRUISE CONTROL: FRONT CAMERA: TARGET ADJUSTMENT(ONE TIME RECOGNITION)

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

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

NEXT

2.

CLEAR DTC (Radar Cruise2)

(a) Clear the DTCs.

Powertrain > Radar Cruise2 > Clear DTCs

NEXT

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)