Toyota Venza: Power Back Door cannot be Opened or Closed Using the Power Back Door Switch

Toyota Venza Service Manual / Door / Hatch / Power Back Door System / Power Back Door cannot be Opened or Closed Using the Power Back Door Switch

DESCRIPTION

When the power back door cannot be opened or closed using the power back door control switch, one of the following may be malfunctioning: 1) power back door control switch circuit, 2) power back door ECU (power back door motor unit) or 3) main body ECU (driver side junction block assembly).

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

The power back door system uses a CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (See page ). Troubleshoot the power back door system after
confirming that the communication system is functioning properly.

PROCEDURE

1.	READ VALUE USING TECHSTREAM (POWER BACK DOOR CONTROL SWITCH)

(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) Check the Data List to determine if the power back door control switch functions properly.

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

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Back Door Open SW	Power back door control switch / ON or OFF	ON: Power back door control switch pushed OFF: Power back door control switch not pushed	-

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Back Door Open SW

Power back door control switch / ON or OFF

ON: Power back door control switch pushed

OFF: Power back door control switch not pushed

OK:

The power back door control switch functions as specified in the normal condition column.

GO TO STEP 5

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

(a) Replace the power back door ECU (power back door motor unit) (See page ).

3.	INITIALIZE POWER BACK DOOR ECU

(a) Perform the initialization for the power back door ECU (power back door motor unit) (See page ).

4.	CHECK POWER BACK DOOR OPERATION

(a) Check that the power back door operates normally (See page ).

OK:

Power back door operates normally.

END (POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT) WAS DEFECTIVE)

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

5.	INSPECT POWER BACK DOOR CONTROL SWITCH

(a) Remove the power back door control switch (See page ).

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

Standard Resistance:

Tester Connection	Switch Position	Specified Condition
1 (E) - 4 (CSW)	Power back door control switch not pushed (off)	10 kΩ or higher
1 (E) - 4 (CSW)	Power back door control switch pushed (on)	Below 1 Ω

REPLACE POWER BACK DOOR CONTROL SWITCH

6.	CHECK HARNESS AND CONNECTOR (POWER BACK DOOR CONTROL SWITCH - MAIN BODY ECU)

(a) Disconnect the D10 power back door control switch and D50 main body ECU connectors.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
D10-4 (CSW) - D50-26 (PBDS)	Always	Below 1 Ω
D10-1 (E) - Body ground	Always	Below 1 Ω
D10-4 (CSW) - Body ground	Always	10 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Power Back Door Control Switch)

Front view of wire harness connector

(to Main Body ECU)

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

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