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
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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 > Front Radar Sensor System: Vehicle Control History
VEHICLE CONTROL HISTORY NOTICE: Make sure to record any output Vehicle Control History codes before clearing them and checking the Vehicle Control History again. CHECK VEHICLE CONTROL HISTORY (FRONT RADAR SENSOR SYSTEM) (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) ...
Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Meter / Gauge System: Short in Turn Signal / Hazard Flasher Circuit (B1508)
DESCRIPTION This DTC is stored when the combination meter assembly detects a short in a turn signal light circuit. HINT: If there is a short in a turn signal light circuit, all of the turn signal lights in that circuit will not blink. DTC No. Detection Item DTC Detection Condition Trouble A ...
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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