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:

Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE MAGNETIC CLUTCH ASSEMBLY (a) Place the compressor and magnetic clutch in a vise. (b) Using SST, hold the magnetic clutch hub. SST: 09985-00270 (c) Remove the bolt, ...

Replacement
REPLACEMENT PROCEDURE 1. REPLACE INTAKE VALVE GUIDE BUSH (a) Heat the cylinder head to approximately 80 to 100°C (176 to 212°F). (b) Place the cylinder head on wooden blocks. (c) Using SST and a hammer, tap out the valve guide bush. SST: 0 ...

Removal
REMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH side and LH side. The following procedure is for the LH side. The rear speed sensor is a component of the rear axle hub and bearing assembly. If the sensor malfuncti ...