Toyota Venza: Touch Sensor Circuit

Toyota Venza Service Manual / Door / Hatch / Power Back Door System / Touch Sensor Circuit

DESCRIPTION

When the power back door ECU receives a jam signal from the touch sensor while the power back door is operating, the ECU reverses the back door operation and opens the door.

WIRING DIAGRAM

PROCEDURE

1.	READ VALUE USING TECHSTREAM (POWER BACK DOOR TOUCH SENSOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Body Electrical / Back Door / Data List.

(e) Check the Data List for proper functioning of the power back door touch sensor.

Back Door (Power back door ECU)

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
PBD Touch Sensor (Right)	Power back door touch sensor RH signal / ON, OFF or Open	ON: Power back door touch sensor RH pressed OFF: Power back door touch sensor RH not pressed Open: Power back door touch sensor RH circuit open	-
PBD Touch Sensor (Left)	Power back door touch sensor LH signal / ON, OFF or Open	ON: Power back door touch sensor LH pressed OFF: Power back door touch sensor LH not pressed Open: Power back door touch sensor LH circuit open	-

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

PBD Touch Sensor (Right)

Power back door touch sensor RH signal / ON, OFF or Open

ON: Power back door touch sensor RH pressed

OFF: Power back door touch sensor RH not pressed

Open: Power back door touch sensor RH circuit open

PBD Touch Sensor (Left)

Power back door touch sensor LH signal / ON, OFF or Open

ON: Power back door touch sensor LH pressed

OFF: Power back door touch sensor LH not pressed

Open: Power back door touch sensor LH circuit open

Result	Proceed to
ON and OFF function is normal	A
ON and OFF function is not normal, or Open is displayed for LH touch sensor	B
ON and OFF function is not normal, or Open is displayed for RH touch sensor	C

END

GO TO STEP 5

2.	CHECK POWER BACK DOOR TOUCH SENSOR LH (POWER BACK DOOR TOUCH SENSOR LH - BODY GROUND)

(a) Disconnect the R3 power back door touch sensor LH connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 (OSL) - Body ground	Always	10 kΩ or higher
2 (OSLE) - Body ground	Always	10 kΩ or higher

Text in Illustration

*1	Component without harness connected (Power Back Door Touch Sensor LH)

HINT:

Perform this inspection with the touch sensor installed on the vehicle.

REPLACE POWER BACK DOOR TOUCH SENSOR LH

3.	INSPECT POWER BACK DOOR TOUCH SENSOR LH

(a) Remove the power back door touch sensor LH (See page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 (OSL) - 2 (OSLE)	Not pressed	950 to 1050 Ω
1 (OSL) - 2 (OSLE)	Pressed	Below 100 Ω

REPLACE POWER BACK DOOR TOUCH SENSOR LH

4.	CHECK HARNESS AND CONNECTOR (TOUCH SENSOR LH - POWER BACK DOOR ECU AND BODY GROUND)

(a) Disconnect the R3 power back door touch sensor LH connector and L20 power back door ECU connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
R3-1 (OSL) - L20-15 (OSL)	Always	Below 1 Ω
R3-2 (OSLE) - L20-14 (OSE)	Always	Below 1 Ω
R3-1 (OSL) - Body ground	Always	10 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Power Back Door Touch Sensor LH)

Front view of wire harness connector

(to Power Back Door ECU)

REPLACE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT)

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	CHECK POWER BACK DOOR TOUCH SENSOR RH (POWER BACK DOOR TOUCH SENSOR RH - BODY GROUND)

(a) Disconnect the R4 power back door touch sensor RH connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 (OSR) - Body ground	Always	10 kΩ or higher
2 (OSRE) - Body ground	Always	10 kΩ or higher

Text in Illustration

*1	Component without harness connected (Power Back Door Touch Sensor RH)

HINT:

Perform this inspection with the touch sensor installed on the vehicle.

REPLACE POWER BACK DOOR TOUCH SENSOR RH

6.	INSPECT POWER BACK DOOR TOUCH SENSOR RH

(a) Remove the power back door touch sensor RH (See page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 (OSR) - 2 (OSRE)	Not pressed	950 to 1050 Ω
1 (OSR) - 2 (OSRE)	Pressed	Below 100 Ω

REPLACE POWER BACK DOOR TOUCH SENSOR RH

7.	CHECK HARNESS AND CONNECTOR (TOUCH SENSOR RH - POWER BACK DOOR ECU AND BODY GROUND)

(a) Disconnect the R4 power back door touch sensor RH connector and L20 power back door ECU connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
R4-1 (OSR) - L20-13 (OSR)	Always	Below 1 Ω
R4-2 (OSRE) - L20-14 (OSE)	Always	Below 1 Ω
R4-1 (OSR) - Body ground	Always	10 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Power Back Door Touch Sensor RH)

Front view of wire harness connector

(to Power Back Door ECU)

REPLACE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT)

REPAIR OR REPLACE HARNESS OR CONNECTOR

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