Toyota Venza: Automatic High Beam Mirror (B124A)

Toyota Venza Service Manual / Lighting (ext) / Lighting System / 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 Condition	Trouble Area
B124A	Malfunction in inner rear view mirror assembly	Inner rear view mirror assembly

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.

PROCEDURE

1.	CHECK FOR DTC

(a) Clear the DTCs (See page ).

(b) Check for DTCs (See page ).

OK:

DTC B124A is not output.

USE SIMULATION METHOD TO CHECK

REPLACE INNER REAR VIEW MIRROR ASSEMBLY

Lost Communication with ECM (U0101,U0073,U0126,U0129,U0142,U0182,U1000)

DESCRIPTION The DTCs are stored when the CAN communication system is malfunctioning. DTC No. DTC Detection Condition Trouble Area U0101 L ...

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 Condi ...

Other materials about Toyota Venza:

Random / Multiple Cylinder Misfire Detected (P0300-P0304)
DESCRIPTION When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. Extremely high hydrocarbon concentration levels can cause an increase in exhaust emission levels. Extremely high concentrations of hydrocarbons can also ...

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION (a) The power back door ECU (power back door motor unit) controls the power back door system functions. Power back door system data and Diagnostic Trouble Code (DTC) can be read through the Data Link Connector 3 (DLC3). W ...

Data List / Active Test
DATA LIST / ACTIVE TEST 1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful bec ...