Toyota 4Runner manuals

Toyota 4Runner: Back Door Power Window Switch ON Stuck (B2312)

Toyota 4Runner Service Manual / Vehicle Exterior / Window / Glass / Power Window Control System / Back Door Power Window Switch ON Stuck (B2312)

DESCRIPTION

This DTC is stored when the back door power window regulator motor is stuck.

NOTICE:

When a power window regulator is reinstalled or replaced, the power window control system must be initialized.

Back Door P/W

DTC Code

DTC Detection Condition

Trouble Area

B2312

The back door power window regulator motor is stuck.

  • Multiplex network door ECU (Back door P/W)
  • Back door power window regulator motor
  • Harness or connector

WIRING DIAGRAM


PROCEDURE

1.

CHECK FOR DTC

(a) Clear the DTC (See page ).


(b) Check for DTCs (See page ).


Result

Result

Proceed to

No DTCs output

A

DTC B2312 is output

B


A

END


B

2.

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

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


Standard Voltage:

Tester Connection

Tool Setting

Switch Condition

Specified Condition

W10-14 (BUP2) - W10-1 (E4)

2 V/DIV., 100 ms/DIV.

Ignition switch ON, back door power window regulator switch up

Pulse generation (See waveform 1

W10-13 (BDN2) - W10-1 (E4)

2 V/DIV., 100 ms/DIV.

Ignition switch ON, back door power window regulator switch down

Pulse generation (See waveform 1)

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 2)


NG

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


OK

3.

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.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

W9-10 (UP) - V10-14 (BUP2)

Always

Below 1 Ω

W9-7 (DOWN) - V10-13 (BDN2)

Always

Below 1 Ω

W9-4 (AUTO) - V10-12 (AUT2)

Always

Below 1 Ω

W9-1 (GND) - V10-1 (E4)

Always

Below 1 Ω

W9-10 (UP) - Body ground

Always

10 kΩ or higher

W9-7 (DOWN) - Body ground

Always

10 kΩ or higher

W9-4 (AUTO) - Body ground

Always

10 kΩ or higher

W9-1 (GND) - Body ground

Always

10 kΩ or higher


OK

REPLACE BACK DOOR POWER WINDOW REGULATOR MOTOR ASSEMBLY


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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