Toyota Venza: Headlight Leveling ECU Power Source Circuit

Toyota Venza Service Manual / Lighting (ext) / Lighting System / Headlight Leveling ECU Power Source Circuit

DESCRIPTION

This circuit detects the state of the ignition switch, and sends it to the headlight leveling ECU assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (BATTERY - HEADLIGHT LEVELING ECU ASSEMBLY)

(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
A40-1 (IG) - Body ground	Ignition switch ON	11 to 14 V
A40-1 (IG) - Body ground	Ignition switch off	Below 1 V

Text in Illustration

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - BODY GROUND)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A40-9 (E1) - Body ground	Always	Below 1 Ω

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

Headlight Beam Level Control Actuator Circuit

DESCRIPTION The headlight leveling ECU assembly actuates the headlight leveling motor according to vehicle conditions. WIRING DIAGRAM PROCEDURE 1. READ VALUE USING TECHS ...

Indicator Circuit

DESCRIPTION The headlight beam level control system indicator light in the combination meter assembly comes on for approximately 3 seconds when the ignition switch is turned to ON. The indicator ...

Other materials about Toyota Venza:

Reassembly
REASSEMBLY PROCEDURE 1. INSTALL FRONT SEAT WIRE (a) Engage the 2 clamps to install the front seat wire. (b) Connect the 4 connectors. 2. INSTALL OCCUPANT CLASSIFICATION ECU 3. INSTALL FRONT LOW ...

Installation
INSTALLATION PROCEDURE 1. INSTALL CONSOLE BOX ASSEMBLY (a) Connect the connectors. (b) Engage the 2 claws. (c) Install the screw and 2 clips. ...

Dtc Check / Clear
DTC CHECK / CLEAR 1. DTC CHECK/CLEAR (USING TECHSTREAM) (a) CHECK DTC (1) Connect the Techstream to the DLC3. (2) Turn the ignition switch on (IG). (3) Read the DTC by following the prompts on the Techstream screen. HINT: Refer to the Techstream operato ...