Toyota Venza manuals

Toyota Venza: 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 system before performing the following inspection procedure.

PROCEDURE

1.

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 relay operates.

Main Body

Tester Display

Test Part

Control Range

Diagnostic Note

Front Fog Light Relay

Front fog light relay

ON/OFF

-

OK:

Front fog light relay operates. (Front fog lights come on.)


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

2.

INSPECT FOG LIGHT RELAY (FOG)

(a) Remove the front fog light relay from the instrument panel junction block.


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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 - 5

Voltage is not applied between terminals 1 and 2

10 kΩ or higher

3 - 5

Voltage is applied between terminals 1 and 2

Below 1 Ω


NG

REPLACE FOG LIGHT RELAY


OK

3.

CHECK HARNESS AND CONNECTOR (BATTERY - FRONT FOG LIGHT RELAY)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

Front fog light relay terminal 5 - Body ground

Always

11 to 14 V

Front fog light relay terminal 1 - Body ground

Light control switch in off position

Below 1 V

Light control switch in tail position

11 to 14 V

Text in Illustration

*1

Main Body ECU (Driver Side Junction Block Assembly)

*2

Front Fog Light Relay Terminal



NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

4.

CHECK HARNESS AND CONNECTOR (FRONT FOG LIGHT RELAY - MAIN BODY ECU)

(a) Disconnect the D50 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

Front fog light relay terminal 2 - D50-4 (FFGO)

Always

Below 1 Ω

D50-4 (FFGO) - Body ground

Always

10 kΩ or higher

Text in Illustration

*1

Main Body ECU (Driver Side Junction Block Assembly)

*3

Front view of wire harness connector

(to Main Body ECU (Driver Side Junction Block Assembly))

*2

Front Fog Light Relay Terminal

-

-


OK

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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