Lexus NX: 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 booster with master cylinder assembly), the forward recognition camera stores DTC U031857.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | 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. |
| 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.
-
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
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Sequential Recognition: Click here
PROCEDURE
| 1. | CHECK FOR DTCs (ELECTRONICALLY CONTROLLED BRAKE SYSTEM) |
(a) Check for electronically controlled brake system DTCs.
Click here
| Result | Proceed to |
|---|---|
| Electronically controlled brake system DTCs are not output | A |
| Electronically controlled brake system DTCs are output | B |
| A | .gif) | REPLACE FORWARD RECOGNITION CAMERA |
| B | | GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM |
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SEE MORE:
Removal
REMOVAL PROCEDURE 1. REMOVE HORN BUTTON ASSEMBLY Click here 2. REMOVE CRUISE CONTROL MAIN SWITCH (a) Remove the 2 screws. *a Guide (b) Detach the guide. (c) Disconnect the connector and remove the cruise control main switch.
System Description
SYSTEM DESCRIPTION FUNCTION OF MAIN COMPONENT Component Function Outer rear view mirror assembly Vertical mirror motor Moves the mirror surface vertically in accordance with the vertical mirror motor outer mirror switch assembly operation. Horizontal mirror motor Moves the mirror
