Toyota Venza: Headlight Beam Level Control Actuator Circuit

Toyota Venza Service Manual / Lighting (ext) / Lighting System / 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 TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Body Electrical / HL Auto Leveling / Active Test.

(e) Check that the motors operate.

HL Auto Leveling

Tester Display	Test Part	Control Range	Diagnostic Note
Drive The Leveling Motor	Leveling motor	UP/OFF	-
Drive The Leveling Motor	Leveling motor	DOWN/OFF	-

OK:

Headlight leveling motors operate normally.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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

(a) Disconnect the A40 headlight leveling ECU connector.

(b) Disconnect the A17 or A16 headlight leveling motor connector.

Standard Resistance:

LH Side

Tester Connection	Condition	Specified Condition
A40-18 (LHT) - A17-2 (LH T)	Always	Below 1 Ω
A40-11 (LH+) - A17-3 (LHM+)	Always	Below 1 Ω
A40-24 (LH-) - A17-1 (LHM-)	Always	Below 1 Ω
A40-18 (LHT) - Body ground	Always	10 kΩ or higher
A40-11 (LH+) - Body ground	Always	10 kΩ or higher
A40-24 (LH-) - Body ground	Always	10 kΩ or higher

RH Side

Tester Connection	Condition	Specified Condition
A40-17 (RHT) - A16-2 (RH T)	Always	Below 1 Ω
A40-10 (RH+) - A16-3 (RHM+)	Always	Below 1 Ω
A40-23 (RH-) - A16-1 (RHM-)	Always	Below 1 Ω
A40-17 (RHT) - Body ground	Always	10 kΩ or higher
A40-10 (RH+) - Body ground	Always	10 kΩ or higher
A40-23 (RH-) - Body ground	Always	10 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Headlight Leveling Motor (Headlight Unit))

LH Side

Front view of wire harness connector

(to Headlight Leveling ECU Assembly)

RH Side

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	REPLACE HEADLIGHT LEVELING MOTOR (HEADLIGHT UNIT)

(a) Temporarily replace the headlight leveling motor with a new or normally functioning one (See page ).

(b) Perform the Active Test of the leveling motors.

OK:

Headlight leveling motors operate normally.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE HEADLIGHT LEVELING ECU ASSEMBLY

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