Toyota Tundra Service Manual: Power Window Switch Malfunction (B2312)

DESCRIPTION

The power window regulator sub-assembly consists of the motor, regulator and ECU. The power window regulator motor is driven by operating the power window switch. This DTC is output when the ECU built into the regulator motor determines that the power window switch is stuck.

NOTICE:

  • When the power window regulator motor is reinstalled or replaced, the power window control system must be initialized.
  • After a door glass or a door glass run has been replaced, the jam protection function may operate unexpectedly when the AUTO UP function is used. In such cases, the AUTO UP function can be resumed by repeating the following operation at least 5 times:

    (a) Close the power window by fully pulling up the power window switch and holding it in the AUTO UP position.

    (b) Open the power window by fully pushing down the power window switch.

Master Switch

DTC Code

DTC Detection Condition

Trouble Area

B2312

  • The power window regulator master switch is stuck.
  • The power window regulator master switch is held in the same position for more than 20 seconds.
  • Power window regulator master switch assembly
  • Harness or connector
  • Power window regulator master switch assembly held in same position for more than 20 seconds
Driver Side Motor

DTC Code

DTC Detection Condition

Trouble Area

B2312

  • The power window regulator master switch stuck.
  • The power window regulator master switch is held in the same position for more than 20 seconds.
  • Power window regulator master switch assembly
  • Front power window regulator motor assembly LH
  • Harness or connector
  • Power window regulator master switch assembly held in same position for more than 20 seconds
Front Passenger Side Motor

DTC Code

DTC Detection Condition

Trouble Area

B2312

  • The power window regulator switch is stuck.
  • The power window regulator switch is held in the same position for more than 20 seconds.
  • Power window regulator switch assembly
  • Front power window regulator motor assembly RH
  • Harness or connector
  • Power window regulator switch assembly held in same position for more than 20 seconds

WIRING DIAGRAM

PROCEDURE

1.

CHECK LIN COMMUNICATION SYSTEM

(a) Check for LIN communication system DTCs related to the power window control system (See page ).

OK:

LIN communication system DTCs are not output.

NG

GO TO LIN COMMUNICATION SYSTEM

OK

2.

CHECK DTC

(a) Check where DTC B2312 is output from.

Result

Result

Proceed to

DTC B2312 output from power window regulator master switch assembly.

A

DTC B2312 output from front power window regulator motor assembly LH.

B

DTC B2312 output from front power window regulator motor assembly RH.

C

B

GO TO STEP 4

C

GO TO STEP 6

A

3.

READ VALUE USING TECHSTREAM (MASTER SWITCH)

(a) Use the Data List to check if the master switch is functioning properly.

Master Switch

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

D Door P/W Auto SW

Driver side power window auto UP/DOWN switch signal / ON or OFF

ON: Driver side switch of master switch operated

OFF: Driver side switch of master switch not operated

-

P Door P/W Auto SW

Front passenger side power window remote auto UP/DOWN switch signal / ON or OFF

ON: Front passenger side switch of master switch operated

OFF: Front passenger side switch of master switch not operated

-

P Door P/W Up SW

Front passenger side power window remote manual UP switch signal / ON or OFF

ON: Front passenger side switch of master switch operated

OFF: Front passenger side switch of master switch not operated

-

P Door P/W Down SW

Front passenger side power window remote manual DOWN switch signal / ON or OFF

ON: Front passenger side switch of master switch operated

OFF: Front passenger side switch of master switch not operated

-

Window Lock Switch Status

Power window LOCK switch / ON or OFF

ON: Power window lock switch in LOCK position

OFF: Power window lock switch in UNLOCK position

-

OK:

The Techstream display changes normally when master switch is operated.

OK

END (DUE TO KEEPING SWITCH OPERATED FOR 20 SECONDS OR MORE)

NG

REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY

4.

READ VALUE USING TECHSTREAM (DRIVER SIDE MOTOR)

(a) Use the Data List to check if the driver side motor is functioning properly.

D-Door Motor

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

D Door P/W Auto SW

Driver side power window auto UP/DOWN switch signal / ON or OFF

ON: Driver side switch operated

OFF: Driver side switch not operated

-

D Door P/W Up SW

Driver side power window MANUAL UP switch signal / ON or OFF

ON: Driver side switch operated

OFF: Driver side switch not operated

-

D Door P/W Down SW

Driver side power window MANUAL DOWN switch signal / ON or OFF

ON: Driver side switch operated

OFF: Driver side switch not operated

-

OK:

The Techstream display changes normally when master switch is operated.

OK

END (DUE TO KEEPING SWITCH OPERATED FOR 20 SECONDS OR MORE)

NG

5.

CHECK HARNESS AND CONNECTOR (MASTER SWITCH - DRIVER SIDE MOTOR)

(a) Disconnect the N2 master switch connector.

(b) Disconnect the N12 motor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

N2-4 (UP) - N12-10 (UP)

Always

Below 1 Ω

N2-5 (DOWN) - N12-7 (DOWN)

Always

Below 1 Ω

N2-4 (UP) - Body ground

Always

10 kΩ or higher

N2-5 (DOWN) - Body ground

Always

10 kΩ or higher

OK

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY LH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.

READ VALUE USING TECHSTREAM (FRONT PASSENGER SIDE MOTOR)

(a) Use the Data List to check if the front passenger side motor is functioning properly.

P-Door Motor

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

P Door P/W Auto SW

Front passenger side power window auto UP/DOWN switch signal / ON or OFF

ON: Power window regulator switch assembly operated

OFF: Power window regulator switch assembly not operated

-

P Door P/W Up SW

Front passenger side power window manual UP switch signal / ON or OFF

ON: Power window regulator switch assembly operated

OFF: Power window regulator switch assembly not operated

-

P Door P/W Down SW

Front passenger side power window manual DOWN switch signal / ON or OFF

ON: Power window regulator switch assembly operated

OFF: Power window regulator switch assembly not operated

-

OK:

The Techstream display changes normally when master switch is operated.

OK

END (DUE TO KEEPING SWITCH OPERATED FOR 20 SECONDS OR MORE)

NG

7.

INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLY

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

(b) Inspect the power window regulator switch assembly (See page ).

NG

REPLACE POWER WINDOW REGULATOR SWITCH ASSEMBLY

OK

8.

CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR SWITCH - FRONT PASSENGER SIDE MOTOR)

(a) Disconnect the M10 switch connector.

(b) Disconnect the M11 motor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

M10-6 (UP) - M11-10 (UP)

Always

Below 1 Ω

M10-7 (DOWN) - M11-7 (DOWN)

Always

Below 1 Ω

M10-8 (AUTO) - M11-4 (AUTO)

Always

Below 1 Ω

M10-6 (UP) - Body ground

Always

10 kΩ or higher

M10-7 (DOWN) - Body ground

Always

10 kΩ or higher

M10-8 (AUTO) - Body ground

Always

10 kΩ or higher

OK

REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    Power Window Motor Malfunction (B2311)

    Glass Position Initialization Incomplete (B2313)

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