Toyota 4Runner: Auto Up / Down Function does not Operate

Toyota 4Runner Service Manual / Vehicle Exterior / Window / Glass / Power Window Control System / Auto Up / Down Function does not Operate

DESCRIPTION

If the auto up/down function does not operate, the cause may be one or more of the following:

The ECU in the back door power window regulator motor determines that the back door power window regulator motor has not been initialized.
The rear back door power window regulator switch has a malfunction.
The Hall IC in the back door power window regulator motor has a malfunction.
There is an open or short in the wiring between the back door power window regulator switch and back door power window regulator motor.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

Since the power window control system has functions that use LIN communication, first confirm that there is no malfunction in the communication system by inspecting the LIN communication functions in accordance with the "How to Proceed with Troubleshooting" procedures. Then, conduct the following inspection procedure.

PROCEDURE

1.	CHECK FOR DTC

(a) Clear the DTCs (See page ).

(b) Check for DTCs (See page ).

Result

Result	Proceed to
DTC is not output	A
DTC B2311 is output	B
DTC B2312 is output	C
DTC B2313 is output	D
LIN communication system DTCs are output	E

GO TO DTC B2311

GO TO DTC B2312

GO TO DTC B2313

GO TO LIN COMMUNICATION SYSTEM

2.	CHECK MANUAL UP/DOWN FUNCTION (BACK DOOR POWER WINDOW REGULATOR SWITCH ASSEMBLY)

(a) Check that the manual up/down function using the back door power window regulator switch can operate the multiplex network door ECU (See page ).

OK:

Manual up/down function operates.

GO TO "Manual Up / Down Function does not Operate on Back Door Only"

3.	READ VALUE USING TECHSTREAM (BACK DOOR POWER WINDOW REGULATOR SWITCH)

(a) Use the Data List to check if the back door power window regulator switch is functioning properly (See page ).

Back Door P/W

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Inside Back Door P/W Auto SW	Back door power window regulator switch auto up/down signal / ON or OFF	ON: Back door power window regulator auto up/down switch operated OFF: Back door power window regulator switch not operated	-

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Inside Back Door P/W Auto SW

Back door power window regulator switch auto up/down signal / ON or OFF

ON: Back door power window regulator auto up/down switch operated

OFF: Back door power window regulator switch not operated

OK:

On tester screen, item changes between ON and OFF according to above chart.

GO TO STEP 6

4.	CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK DOOR ECU - BACK DOOR POWER WINDOW REGULATOR MOTOR ASSEMBLY)

(a) Disconnect the W9 back door power window regulator motor connector.

(b) Disconnect the W10 multiplex network door ECU connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
W9-4 (AUTO) - W10-12 (AUT2)	Always	Below 1 Ω
W9-1 (GND) - W10-1 (E4)	Always	Below 1 Ω
W9-4 (AUTO) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	CHECK MULTIPLEX NETWORK DOOR ECU (BACK DOOR P/W)

(a) Reconnect the multiplex network door ECU.

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

Standard Voltage:

Tester Connection	Tool Setting	Switch Condition	Specified Condition
W10-12 (AUT2) - W10-1 (E4)	2 V/DIV., 100 ms/DIV.	Ignition switch ON, back door power window auto up or auto down function operating	Pulse generation (See waveform 1)

REPLACE BACK DOOR POWER WINDOW REGULATOR MOTOR ASSEMBLY

REPLACE MULTIPLEX NETWORK DOOR ECU (BACK DOOR P/W)

6.	INSPECT BACK DOOR POWER WINDOW REGULATOR SWITCH ASSEMBLY

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

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
8 (AUTO) - 1 (E)	Auto up/down operation	Below 1 Ω
8 (AUTO) - 1 (E)	Not operated	10 kΩ or higher

REPLACE BACK DOOR POWER WINDOW REGULATOR SWITCH ASSEMBLY

7.	CHECK HARNESS AND CONNECTOR (BACK DOOR POWER WINDOW REGULATOR SWITCH ASSEMBLY - MULTIPLEX NETWORK DOOR ECU AND BODY GROUND)

(a) Disconnect the f1 back door power window regulator switch connector.

(b) Disconnect the V2 multiplex network door ECU connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
f1-8 (AUTO) - V2-21 (AUTO)	Always	Below 1 Ω
f1-1 (E) - Body ground	Always	Below 1 Ω
f1-8 (AUTO) - Body ground	Always	10 kΩ or higher

REPLACE MULTIPLEX NETWORK DOOR ECU (BACK DOOR P/W)

REPAIR OR REPLACE HARNESS OR CONNECTOR

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