Toyota Venza manuals

Toyota Venza: Parking Brake Switch Circuit

Toyota Venza Service Manual / Lighting (ext) / Lighting System / Parking Brake Switch Circuit

DESCRIPTION

The main body ECU (driver side junction block assembly) detects the condition of the parking brake 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

Parking Brake SW

Parking brake SW signal/ON or OFF

ON: Parking brake switch on

OFF: Parking brake switch off

-

OK:

Normal conditions listed above are displayed.


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

2.

INSPECT PARKING BRAKE SWITCH ASSEMBLY

(a) Remove the parking brake switch assembly (See page ).



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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 - Switch body

Shaft pushed in (OFF)

10 kΩ or higher

1 - Switch body

Shaft not pushed in (ON)

Below 1 Ω


NG

REPLACE PARKING BRAKE SWITCH ASSEMBLY


OK

3.

CHECK HARNESS AND CONNECTOR (SWITCH - MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY))

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


(b) Disconnect the L15 parking brake switch assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2C-7 - L15-1

Always

Below 1 Ω

2C-7 - 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 Parking Brake Switch Assembly)


OK

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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