Toyota Camry (XV70): 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 | DTC Output from |
|---|---|---|---|---|
|
B124B | Automatic High Beam System |
Malfunction in automatic high beam system |
| Main Body |
- *: w/ Road Sign Assist System
WIRING DIAGRAM
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 here
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- Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*
Click here
- *: w/ Smart Key System
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
- Millimeter wave radar sensor
- CAN communication system
PROCEDURE
|
1. | CHECK FOR DTC (HEALTH CHECK) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(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 and other DTCs are output |
B |
| B | .gif) |
GO TO OTHER DTC CHART |
|
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|
2. | CHECK FRONT CAMERA SYSTEM |
(a) Check if a dynamic radar cruise control system, lane tracing assist system, road sign assist system*, front radar sensor system or pre-collision system warning message is displayed on the multi-information display.
Click here
OK:
No dynamic radar cruise control system, lane tracing assist system, road sign assist system*, front radar sensor system or pre-collision system warning messages are displayed.
- *: w/ Road Sign Assist System
| OK | |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG | |
GO TO FRONT CAMERA SYSTEM |
READ NEXT:
Automatic High Beam Camera (B124C)
DESCRIPTION The main body ECU (multiplex network body ECU) detects a high beam headlight illumination request signal of the automatic high beam system from the forward recognition camera.
DTC N
LED Headlight LH (B2430,B2431)
DESCRIPTION These DTCs are stored when the low beam headlights do not illuminate, or a communication malfunction is detected between the light control LED ECU and main body ECU (multiplex network body
Lost Communication With ECM/PCM "A" (U0100,U0101,U0120,U0126,U0129,U0151,U0155,U0163,U0164,U023A,U0327,U1106,U1117)
DESCRIPTION These DTCs are stored if a CAN communication malfunction occurs between the main body ECU (multiplex network body ECU) and other ECUs.
DTC No. Detection Item
DTC Detection C
SEE MORE:
Left Rear Wheel Speed Sensor Signal Stuck Low (C050C23)
DESCRIPTION Refer to DTC C050C12 Click here
DTC No. Detection Item
DTC Detection Condition Trouble Area
C050C23 Left Rear Wheel Speed Sensor Signal Stuck Low
When the vehicle is driven from 0 km/h to 12 km/h (0 mph to 7 mph), the wheel speed is 1.8 km/h (1.1 m
Precaution
PRECAUTION PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL
NOTICE: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected.
System Name See Procedure
Lane Tracing Assist System
