Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001G1NM
Model Year Start: 2019 Model: RAV4 HV Prod Date Range: [11/2018 - 12/2021]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM (for HV Model): U031857; Software Incompatibility with Brake System Control Module Invalid/Incompatible Software Component; 2019 - 2021 MY RAV4 HV [11/2018 - 12/2021]

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 booster with master cylinder 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 booster with master cylinder 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 perform beam axis adjustment for the forward recognition camera and clear the vehicle control history for each system.

    HINT:

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

    One Time Recognition: Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; CRUISE CONTROL: FRONT CAMERA: ADJUSTMENT (ONE TIME RECOGNITION) 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; CRUISE CONTROL: FRONT CAMERA: ADJUSTMENT (ONE TIME RECOGNITION)

    Sequential Recognition: Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; CRUISE CONTROL: FRONT CAMERA: ADJUSTMENT (SEQUENTIAL RECOGNITION) 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; CRUISE CONTROL: FRONT CAMERA: ADJUSTMENT (SEQUENTIAL RECOGNITION)

PROCEDURE

1.

CHECK FOR DTCs (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)

(a) Check for electronically controlled brake system DTCs.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DTC CHECK / CLEAR 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): DTC CHECK / CLEAR

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