Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: 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 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. |
| 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
.gif)
Sequential Recognition: Click here
PROCEDURE
| 1. | CHECK FOR DTCs |
(a) Check for vehicle stability control system DTCs.
Chassis > Brake/EPB > Trouble Codes| Result | Proceed to |
|---|---|
| Vehicle stability control system DTCs are not output | A |
| Vehicle stability control system DTCs are output | B |
| A | .gif) | REPLACE FORWARD RECOGNITION CAMERA |
| B | | GO TO VEHICLE STABILITY 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 ...
Software Incompatibility with Body Control Module Not Programmed (U032251)
DESCRIPTION If the forward recognition camera cannot verify the vehicle information sent from the main body ECU (multiplex network body ECU), the forward recognition camera stores DTC U032251. DTC ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Brake (front): Front Disc Brake Pad
ReplacementREPLACEMENT CAUTION / NOTICE / HINT NOTICE: After replacing the front disc brake pads, the brake pedal may feel soft due to clearance between the front disc brake pads and front disc. Depress the brake pedal several times until the brake pedal feels firm. HINT:
Use the same procedure f ...
Lexus RX (RX 350L, RX450h) 2016-2026 Owners Manual > When trouble
arises: Essential information
Emergency flashers
The emergency flashers are used to warn other drivers when the vehicle
has
to be stopped on the road due to a breakdown, etc.
Press the switch.
All the turn signal lights will flash. To turn
them off, press the switch once again.
■ Emergency flashers
If the emergenc ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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