Toyota Venza manuals

Toyota Venza: Daytime Running Light Relay Circuit

Toyota Venza Service Manual / Lighting (ext) / Lighting System / Daytime Running Light Relay Circuit

DESCRIPTION

The main body ECU (driver side junction block assembly) controls the daytime running lights.

WIRING DIAGRAM

1. for Halogen Headlight


2. for HID Headlight


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

Daytime Running Light

Daytime running light relay

ON/OFF

-

OK:

Relay operates. (Daytime running lights illuminate.)

Result

Proceed to

OK

A

NG (for Halogen Headlight)

B

NG (for HID Headlight)

C


A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


C

GO TO STEP 5


B

2.

CHECK HEADLIGHT

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

OK:

High beam headlights operate normally.


NG

GO TO PROBLEM SYMPTOMS TABLE


OK

3.

INSPECT POWER DISTRIBUTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY)

(a) Remove the power distributor (engine room junction block assembly) from the engine room relay block (See page ).



(b) Connect a positive (+) lead from the battery to terminal 1A-1.

(c) Connect a negative (-) lead from the battery to terminal 1F-16.

(d) Check for pulses according to the value(s) in the table below.

Standard:

Tester Connection

Condition

Specified Condition

1D-3 - Battery negative

Always

Pulse generation

1D-4 - Battery negative

Always

Pulse generation

Text in Illustration

*1

Component without harness connected

(Power Distributor (Engine Room Junction Block Assembly))


NG

REPLACE POWER DISTRIBUTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY)


OK

4.

CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - MAIN BODY ECU)

(a) Disconnect the 1F power distributor (engine room junction block assembly) connector.


(b) Disconnect the D51 main body ECU (driver side junction block assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1F-16 - D51-10 (DRL)

Always

Below 1 Ω

D51-10 (DRL) - Body ground

Always

10 kΩ or higher

Text in Illustration

*1

Front view of wire harness connector

(to Power Distributor (Engine Room Junction Block Assembly))

*2

Front view of wire harness connector

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


OK

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.

INSPECT POWER DISTRIBUTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY)

(a) Remove the power distributor (engine room junction block assembly) from the engine room relay block (See page ).



(b) Connect a positive (+) lead from the battery to terminal 1A-1.

(c) Connect a negative (-) lead from the battery to terminal 1F-15.

(d) Check for pulses according to the value(s) in the table below.

Standard:

Tester Connection

Condition

Specified Condition

1D-3 - Battery negative

Always

Pulse generation

1D-4 - Battery negative

Always

Pulse generation

Text in Illustration

*1

Component without harness connected

(Power Distributor (Engine Room Junction Block Assembly))


NG

REPLACE POWER DISTRIBUTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY)


OK

6.

CHECK HARNESS AND CONNECTOR (ENGINE ROOM JUNCTION BLOCK ASSEMBLY - MAIN BODY ECU)

(a) Disconnect the 1F power distributor (engine room junction block assembly) connector.


(b) Disconnect the D51 main body ECU (driver side junction block assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1F-15 - D51-10 (DRL)

Always

Below 1 Ω

D51-10 (DRL) - Body ground

Always

10 kΩ or higher

Text in Illustration

*1

Front view of wire harness connector

(to Power Distributor (Engine Room Junction Block Assembly))

*2

Front view of wire harness connector

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


OK

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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