Lexus NX: Automatic High Beam System (B124B)
DESCRIPTION
The main body ECU (multiplex network body ECU) determines the status of the automatic high beam system based on the automatic high beam system signal from the forward recognition camera.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B124B | Automatic High Beam System | Malfunction in automatic high beam system |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this symptom
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HINT:
If the forward recognition camera stores a DTC for a malfunction of any of the following, this DTC will be stored simultaneously.- Speed sensor malfunction
- Yaw rate sensor malfunction
- Steering sensor malfunction
- CAN communication system
PROCEDURE
| 1. | CHECK FOR DTC (HEALTH CHECK) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: System Select / Health Check.
(e) Check for DTCs.
| Result | Proceed to |
|---|---|
| Only DTC B124B is output | A |
| DTC B124B is output at the same time | B |
| B | .gif) | GO TO OTHER DTC CHART |
|
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| 2. | CHECK FORWARD RECOGNITION CAMERA |
(a) Check if a dynamic radar cruise control system, lane tracing assist system, road sign assist system and pre-collision system warning message are displayed on the combination meter assembly.
Click here
OK:
No dynamic radar cruise control system, lane tracing assist system, road sign assist system and pre-collision system warning messages are displayed.
| OK | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG | | GO TO FRONT CAMERA SYSTEM |
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Installation
INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE 1. INSTALL OUTER REAR VIEW MIRROR ASSEMBLY LH (a) Attach the claw to temporarily install the outer rear view mirror assembly LH. (b) Install the
Components
COMPONENTS ILLUSTRATION *1 DECK FLOOR BOX LH *2 NO. 3 DECK BOARD SUB-ASSEMBLY *3 REAR DECK FLOOR BOX *4 NEGATIVE AUXILIARY BATTERY TERMINAL N*m (kgf*cm, ft.*lbf): Specified torque - - ILLUSTRATION *1 REAR DOOR INNER GLASS WEATHERSTRIP LH *2 REAR DOOR INSID
