Toyota Venza: Lost Communication with Automatic High Beam Sensor (B2432)

Toyota Venza Service Manual / Lighting (ext) / Lighting System / Lost Communication with Automatic High Beam Sensor (B2432)

DESCRIPTION

The DTC is stored when the AFS ECU (headlight swivel ECU assembly) detects malfunctions in the LIN communication system.

DTC No.	DTC Detection Condition	Trouble Area
B2432	Malfunction in LIN communication system	Inner rear view mirror assembly Harness or connector AFS ECU (headlight swivel ECU assembly)

WIRING DIAGRAM

PROCEDURE

1.	CHECK FOR DTC

(a) Clear the DTCs (See page ).

(b) Check for DTCs (See page ).

OK:

DTC B2432 is not output.

USE SIMULATION METHOD TO CHECK

2.	CHECK HARNESS AND CONNECTOR (AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) - HEADLIGHT ASSEMBLY)

(a) Disconnect the D44 AFS ECU (headlight swivel ECU assembly) connector.

(b) Disconnect the P12 inner rear view mirror assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
D44-10 (SMR) - P12-3 (LIN)	Always	Below 1 Ω
P12-3 (LIN) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)

(a) Reconnect the D44 AFS ECU (headlight swivel ECU assembly) connector.

(b) Connect an oscilloscope to the P12 inner rear view mirror assembly connector.

OK:

Tester Connection	Tool Setting	Condition	Specified Condition
P12-3 (LIN) - P12-2 (E)	2 V/DIV., 20 ms./DIV.	Ignition switch ON	Correct waveform is as shown

Text in Illustration

*1	Front view of wire harness connector (to Inner Rear View Mirror Assembly)

REPLACE INNER REAR VIEW MIRROR ASSEMBLY

REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)

Vehicle Specifications have not been Stored (B2451)

DESCRIPTION The headlight leveling ECU assembly stores this DTC if the vehicle specifications have not been stored in the ECU. HINT: The vehicle specifications are stored in the ECU at the factor ...

Initialization has not been Performed (B2450)

DESCRIPTION The headlight leveling ECU assembly stores this DTC if initialization has not been performed after the ECU was replaced. DTC No. DTC Detecting Condition ...

Other materials about Toyota Venza:

One or more Power Seat Motors do not Operate
DESCRIPTION Signals are input into the position control ECU and switch assembly. The built-in ECU manages the signals received from the position control ECU and switch assembly, and operates each motor. If the position control ECU and switch assembly rece ...

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use these procedure to troubleshoot the seat belt warning system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of ...