Toyota Venza: Headlight Signal Circuit

Toyota Venza Service Manual / Lighting (ext) / Lighting System / Headlight Signal Circuit

DESCRIPTION

The headlight leveling ECU assembly detects the low beam headlights status.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

First check that the low beam headlights operate normally.

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - ECU)

(a) Disconnect the A40 headlight leveling ECU assembly connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
A40-3 (B2) - Body ground	Light control switch in head position	11 to 14 V

Text in Illustration

*1	Front view of wire harness connector (to Headlight Leveling ECU assembly)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

Front Fog Light Circuit

DESCRIPTION The main body ECU (driver side junction block assembly) controls the fog light relay. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this ...

Light Control Switch Circuit

DESCRIPTION The main body ECU (driver side junction block assembly) receives the following switch information: Light control switch position off, tail, head or AUTO Dimmer switch positi ...

Other materials about Toyota Venza:

Installation
INSTALLATION PROCEDURE 1. INSTALL SHIFT LEVER ASSEMBLY NOTICE: Check that the park/neutral position switch and the shift lever are in neutral. (a) Slide the slider of the transmission control cable in the direction indicated by the arrow an ...

Driver Side Door Entry Lock Function does not Operate
DESCRIPTION If the driver door entry unlock function operates normally, but its entry lock function does not, this means that the request code from the driver door is being output normally. In this case, a malfunction in the lock sensor circuit (from the ...

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 ...