RM35X0E _59 Vehicle Exterior _079256 LIGHTING (EXT) _0396321 LIGHTING SYSTEM(w/ Headlight ECU) C

LIGHTING (EXT)  LIGHTING SYSTEM(w/ Headlight ECU)  B124B  Automatic High Beam System  


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 DTC Output from Note
B124B Automatic High Beam System Malfunction in automatic high beam system
·

Front camera system

·

Dynamic radar cruise control system

·

Lane control system

·

Road sign assist system

·

Pre-collision system

·

SFI system

·

Electronically controlled brake system

·

CAN communication system

·

Forward recognition camera

·

Main body ECU (multiplex network body ECU)


Main Body w/ Automatic High Beam System

WIRING DIAGRAM

E303800E65
1.052,1.573 3.323,1.896 2.271,0.323 10 false Forward Recognition Camera 0.698,2.26 2.781,2.563 2.083,0.302 10 false : CAN Communication Line 4.729,1.563 6.375,2 1.646,0.438 10 false Main Body ECU (Multiplex Network Body ECU)

CAUTION / NOTICE / HINT

NOTICE:
·

The lighting system uses the CAN communication system. Inspect the communication functions by following How to Proceed with Troubleshooting. Troubleshoot the automatic high beam system after confirming that the communication systems are functioning properly.

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM (w/ Headlight ECU)>HOW TO PROCEED WITH TROUBLESHOOTING

·

Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.



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

·

Yaw rate sensor

·

Steering sensor

·

CAN communication system



PROCEDURE

1.CHECK FOR DTC (HEALTH CHECK)
a.

Connect the GTS to the DLC3.


b.

Turn the engine switch on (IG).


c.

Turn the GTS on.


d.

Enter the following menus: System Select / Health Check.


e.

Check for DTCs.


Result:
Result Proceed to
Only DTC B124B is output A
DTC B124B and other DTCs are output B



A

2.CHECK FRONT CAMERA SYSTEM

B

GO TO OTHER DTC CHART

2.CHECK FRONT CAMERA SYSTEM
a.

Check if a dynamic radar cruise control system, lane control system or pre-collision system warning message is displayed on the multi-information display.

Click hereEngine / Hybrid System>CRUISE CONTROL>FRONT CAMERA SYSTEM>DIAGNOSIS SYSTEM

OK:

No dynamic radar cruise control system, lane control system, road sign assist system and pre-collision system warning messages are displayed.



Result:
Proceed to
OK
NG



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

for LHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL

for RHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL


NG

GO TO FRONT CAMERA SYSTEM

Click hereEngine / Hybrid System>CRUISE CONTROL>FRONT CAMERA SYSTEM>PROBLEM SYMPTOMS TABLE