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.

(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	-

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.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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

REPLACE PARKING BRAKE SWITCH ASSEMBLY

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.

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

Front view of wire harness connector:

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

Front view of wire harness connector

(to Parking Brake Switch Assembly)

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

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