Toyota Venza manuals

Toyota Venza: Door Courtesy Switch Circuit

Toyota Venza Service Manual / Lighting (int) / Lighting System / Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU (driver side junction block assembly) detects the condition of the door courtesy light switch.

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 / Main Body / Data List.

(e) Read the display on the Techstream.

Main Body

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

D door Courtesy SW

Driver side door courtesy light switch signal/ON or OFF

ON: Driver side door open

OFF: Driver side door closed

-

P door Courtesy SW

Front passenger side door courtesy light switch signal/ON or OFF

ON: Front passenger side door open

OFF: Front passenger side door closed

-

RR door Courtesy SW

Rear door courtesy light switch RH signal/ON or OFF

ON: Rear door RH open

OFF: Rear door RH closed

-

RL door Courtesy SW

Rear door courtesy light switch LH signal/ON or OFF

ON: Rear door LH open

OFF: Rear door LH closed

-

Back door Courtesy SW

Back door Courtesy switch signal/ON or OFF

ON: Back door open

OFF: Back door closed

-

OK:

Normal conditions listed above are displayed.

Result

Proceed to

OK

A

Driver side or front passenger side courtesy light switch does not operate

B

Rear door courtesy light switch LH or RH does not operate

C

Back door courtesy switch does not operate

D


A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


C

GO TO STEP 4


D

GO TO STEP 6


B

2.

INSPECT COURTESY LIGHT SWITCH (DRIVER SIDE OR FRONT PASSENGER SIDE)

(a) Remove the courtesy light switch (See page ).



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

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

1 - Switch body

Pushed

10 kΩ or higher

1 - Switch body

Not pushed

Below 1 Ω

Text in Illustration

*1

Component without harness connected

(Courtesy Light Switch)

*2

Switch Body


NG

REPLACE COURTESY LIGHT SWITCH


OK

3.

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - FRONT COURTESY LIGHT SWITCH)

(a) for Driver Side

(1) Disconnect the D50 main body ECU (driver side junction block assembly) connector.

(2) Disconnect the L8 courtesy light switch connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D50-24 (DCTY) - L8-1

Always

Below 1 Ω

D50-24 (DCTY) - Body ground

Always

10 kΩ or higher

Text in Illustration

*1

Front view of wire harness connector

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

*2

Front view of wire harness connector

(to Courtesy Light Switch)


(b) for Front Passenger Side

(1) Disconnect the D49 main body ECU (driver side junction block assembly) connector.

(2) Disconnect the M8 courtesy light switch connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D49-21 (PCTY) - M8-1

Always

Below 1 Ω

D49-21 (PCTY) - Body ground

Always

10 kΩ or higher

Text in Illustration

*1

Front view of wire harness connector

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

*2

Front view of wire harness connector

(to Courtesy Light Switch)



OK

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

INSPECT COURTESY LIGHT SWITCH (REAR LH SIDE OR REAR RH SIDE)

(a) Remove the courtesy light switch (See page ).



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

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

1 - Switch body

Pushed

10 kΩ or higher

1 - Switch body

Not pushed

Below 1 Ω

Text in Illustration

*1

Component without harness connected

(Courtesy Light Switch)

*2

Switch Body


NG

REPLACE COURTESY LIGHT SWITCH


OK

5.

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - REAR COURTESY LIGHT SWITCH)

(a) for Rear LH Side

(1) Disconnect the 2O main body ECU (driver side junction block assembly) connector.

(2) Disconnect the L9 courtesy light switch connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2O-19 (LCTY) - L9-1

Always

Below 1 Ω

2O-19 (LCTY) - Body ground

Always

10 kΩ or higher

Text in Illustration

*1

Front view of wire harness connector

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

*2

Front view of wire harness connector

(to Courtesy Light Switch)


(b) for Rear RH Side

(1) Disconnect the D49 main body ECU (driver side junction block assembly) connector.

(2) Disconnect the M9 courtesy light switch connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D49-7 (RCTY) - M9-1

Always

Below 1 Ω

D49-7 (RCTY) - Body ground

Always

10 kΩ or higher

Text in Illustration

*1

Front view of wire harness connector

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

*2

Front view of wire harness connector

(to Courtesy Light Switch)



OK

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.

INSPECT BACK DOOR LOCK ASSEMBLY

(a) Remove the back door lock assembly (See page ).



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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 (CTY) - 4 (E)

Open-latched

Below 1 Ω

3 (CTY) - 4 (E)

Half-latched

Below 1 Ω

3 (CTY) - 4 (E)

Full-latched

10 kΩ or higher

3 (CTY) - 4 (E)

Over-latched

10 kΩ or higher


NG

REPLACE BACK DOOR LOCK ASSEMBLY


OK

7.

CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK - MAIN BODY ECU)

(a) Disconnect the D49 main body ECU (driver side junction block assembly) connector.


(b) Disconnect the R1 back door lock assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D49-25 (BCTY) - R1-3 (CTY)

Always

Below 1 Ω

D49-25 (BCTY) - Body ground

Always

10 kΩ or higher

R1-4 (E) - Body ground

Always

Below 1 Ω

Text in Illustration

*1

Front view of wire harness connector

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

*2

Front view of wire harness connector

(to Back Door Lock Assembly)


OK

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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