Lexus NX: 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 booster with master cylinder assembly), the forward recognition camera stores DTC U031851.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from |
|---|---|---|---|---|
| U031851 | Software Incompatibility with Brake System Control Module Not Programmed | The vehicle information sent from the skid control ECU (brake booster with master cylinder assembly) cannot be verified by the forward recognition camera. | 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. | REPLACE FORWARD RECOGNITION CAMERA |
(a) Replace the forward recognition camera with a new one.
Click here
(b) Perform beam axis adjustment for the forward recognition camera.
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
|
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| 2. | CLEAR DTC (Radar Cruise2) |
(a) Clear the DTCs.
Click here
| NEXT | .gif) | END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE) |
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Parts Location
PARTS LOCATION ILLUSTRATION *1 MOBILE WIRELESS CHARGER CRADLE ASSEMBLY *2 CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) *3 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - ACC FUSE - PANEL FUSE *4 NO. 2 ENGINE ROOM RELAY BLOCK - ECU-B NO.1 FUSE
Installation
INSTALLATION CAUTION / NOTICE / HINT NOTICE:
Do not replace the spiral with sensor cable sub-assembly with the battery connected and the power switch on (IG).
Do not rotate the spiral with sensor cable sub-assembly when the following conditions are met: 1) The steering wheel is removed, 2) the
