Toyota Venza manuals

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.

(c) Turn the Techstream 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

-

DOWN/OFF

-

OK:

Headlight leveling motors operate normally.


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

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.

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

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

*1

Front view of wire harness connector

(to Headlight Leveling Motor (Headlight Unit))

*3

LH Side

*2

Front view of wire harness connector

(to Headlight Leveling ECU Assembly)

*4

RH Side


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

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.


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

REPLACE HEADLIGHT LEVELING ECU ASSEMBLY

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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 ci ...

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