Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Software Incompatibility with Brake System Control Module Not Programmed (U031851)

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Engine & Hybrid System / Cruise Control / Dynamic Radar Cruise Control System / Software Incompatibility with Brake System Control Module Not Programmed (U031851)

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

DTC Output from

U031851

Software Incompatibility with Brake System Control Module Not Programmed

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

Forward recognition camera

Does not come on

Forward recognition camera

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

    Sequential Recognition: Click here

PROCEDURE

1.

REPLACE FORWARD RECOGNITION CAMERA

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

Click here

NEXT

2.

CLEAR DTC

(a) Clear the DTCs.

Powertrain > Radar Cruise2 > Clear DTCs
NEXT

END

    Internal Control Module Software Incompatibility Invalid/Incompatible Software Component (U030057)
    DESCRIPTION If the vehicle information stored in the forward recognition camera does not match the vehicle information sent from the ECM, the forward recognition camera stores DTC U030057. DTC No. ...

    Software Incompatibility with Brake System Control Module Invalid/Incompatible Software Component (U031857)
    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 ...

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