Toyota Venza: Automatic High Beam System (B124B)

Toyota Venza Service Manual / Lighting (ext) / Lighting System / Automatic High Beam System (B124B)

DESCRIPTION

The DTC is stored when the main body ECU (driver side junction block assembly) detects malfunctions in the automatic high beam system.

DTC No.	DTC Detection Condition	Trouble Area
B124B	Malfunction in automatic high beam system	Steering angle sensor, VSC system or EFI system Inner rear view mirror assembly

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.

PROCEDURE

1.	CHECK FOR DTC

(a) Clear the DTCs (See page ).

(b) Check for DTCs (See page ).

OK:

DTC B124B is not output.

USE SIMULATION METHOD TO CHECK

2.	CHECK FOR DTC

(a) Check for DTCs (See page ).

Result	Proceed to
DTC B2414 is output	A
DTC B2415 is output	B
DTC U0126, DTC U0129 or DTC U0101 is output	C
Other DTC is not output	D

GO TO DTC CHART

REPLACE INNER REAR VIEW MIRROR ASSEMBLY

Automatic High Beam Mirror (B124A)

DESCRIPTION The DTC is stored when the main body ECU (driver side junction block assembly) detects malfunctions in the inner rear view mirror assembly. DTC No. DTC Detection ...

Automatic High Beam Camera (B124C)

DESCRIPTION The DTC is stored when the main body ECU (driver side junction block assembly) detects malfunctions in the camera (inner rear view mirror assembly). DTC No. DTC D ...

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