Toyota Venza manuals

Toyota Venza: Headlight Solenoid Circuit

DESCRIPTION

  • for HID Headlight:

    When the main body ECU receives a high beam turn on signal, the main body ECU activates the bi-function by controlling the BI-XENON relay. The bi-function increases the upper illumination area of the discharge bulb (low beam) by moving a shade using a solenoid built into the headlight unit.

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.

CHECK OPERATION (LOW BEAM HEADLIGHTS)

(a) Check the operation of the low beam headlights.

OK:

Low beam headlights operate normally.


NG

GO TO PROBLEM SYMPTOMS TABLE


OK

2.

PERFORM ACTIVE TEST 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 / Main Body / Active Test.

(e) Check that the high beam headlights illuminate.

Main Body

Tester Display

Test Part

Control Range

Diagnostic Note

Head Light Hi

High beam headlight relay

ON/OFF

-

OK:

High beam headlights illuminate.


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

3.

INSPECT BI-XENON RELAY (BI-XENON)

(a) Remove the BI-XENON relay from the power distributor (engine room junction block assembly).


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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 - 5

Battery voltage applied to terminals 1 and 2

Below 1 Ω

3 - 5

Battery voltage not applied between terminals

10 kΩ or higher


NG

REPLACE BI-XENON RELAY


OK

4.

CHECK HARNESS AND CONNECTOR (BATTERY - BI-XENON RELAY)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

Relay terminal 2 - Body ground

Always

11 to 14 V

Relay terminal 5 - Body ground

Always

11 to 14 V


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

5.

CHECK HARNESS AND CONNECTOR (BI-XENON RELAY - HEADLIGHT ASSEMBLY)

(a) Disconnect the A53 headlight assembly LH connector.

(b) Disconnect the A52 headlight assembly RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Relay terminal 3 - A53-4

Always

Below 1 Ω

Relay terminal 3 - A52-4

Always

Below 1 Ω

Relay terminal 3 - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

6.

CHECK HARNESS AND CONNECTOR (BI-XENON RELAY - DRIVER SIDE JUNCTION BLOCK)

(a) Disconnect the 2C main body ECU (driver side junction block assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Relay terminal 1 - 2C-23

Always

Below 1 Ω

2C-23 - Body ground

Always

10 kΩ or higher


OK

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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