DTC    B2312    Power Window Switch Malfunction

for Preparation Click here


DESCRIPTION

The power window regulator motor assemblies are operated by the multiplex network master switch assembly, power window regulator switch assembly or rear power window regulator switch assemblies. The power window regulator motor assemblies have motor, regulator and ECU functions.
This DTC is output when the ECU built into a regulator motor and master switch determine that the multiplex network master switch assembly, power window regulator switch assembly or rear power window regulator switch assembly is stuck.

Master Switch (Multiplex Network Master Switch Assembly) 
DTC No.
DTC Detection Condition
Trouble Area
B2312
  1. Multiplex network master switch assembly stuck
  2. Multiplex network master switch assembly held in same position for more than 20 seconds
  3. Door control switch (multiplex network master switch assembly) operated for 20 seconds or more
Multiplex network master switch assembly

D-Door Motor (Power Window Regulator Motor Assembly (for Driver Side)) 
DTC No.
DTC Detection Condition
Trouble Area
B2312
  1. Multiplex network master switch assembly stuck
  2. Multiplex network master switch assembly held in same position for more than 20 seconds
  1. Multiplex network master switch assembly
  2. Power window regulator motor assembly (for driver side)
  3. Wire harness or connector

P-Door Motor (Power Window Regulator Motor Assembly (for Front Passenger Side)) 
DTC No.
DTC Detection Condition
Trouble Area
B2312
  1. Power window regulator switch assembly stuck
  2. Power window regulator switch assembly held in same position for more than 20 seconds
  1. Power window regulator switch assembly
  2. Power window regulator motor assembly (for front passenger side)
  3. Wire harness or connector

RL-Door Motor (Power Window Regulator Motor Assembly (for Rear LH Side)) 
DTC No.
DTC Detection Condition
Trouble Area
B2312
  1. Rear power window regulator switch assembly (for LH side) stuck
  2. Power window regulator switch assembly held in same position for more than 20 seconds
  1. Rear power window regulator switch assembly (for LH side)
  2. Power window regulator motor assembly (for rear LH side)
  3. Wire harness or connector

RR-Door Motor (Power Window Regulator Motor Assembly (for Rear RH Side)) 
DTC No.
DTC Detection Condition
Trouble Area
B2312
  1. Rear power window regulator switch assembly (for RH side) stuck
  2. Power window regulator switch assembly held in same position for more than 20 seconds
  1. Rear power window regulator switch assembly (for RH side)
  2. Power window regulator motor assembly (for rear RH side)
  3. Wire harness or connector

WIRING DIAGRAM


for Driver Side

B234587E03


for Front Passenger Side

B203371E92


for Rear LH Side

B203371E88


for Rear RH Side

B203371E89


INSPECTION PROCEDURE

HINT:
If DTC B2312 is not output again after the DTC has been cleared, the DTC was output due to the switch being held.

NOTICE:
  1. DTC B2312 can be stored in the multiplex network master switch assembly and in each power window regulator motor assembly (power window ECU).
  2. If a power window regulator motor assembly has been replaced with a new one, initialize the power window control system (Click here).

1.CHECK FOR DTC

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC B2312 is not output.



NG
Go to step 2
OK

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

2.CHECK DTC OUTPUT

  1. Check the parts which the DTCs have been output from.

    Result:
    Result
    		Proceed to
    DTC output from multiplex network master switch assembly
    		A
    DTC output from power window regulator motor assembly (for driver side)
    		B
    DTC output from power window regulator motor assembly (for front passenger side)
    		C
    DTC output from power window regulator motor assembly (for rear LH side)
    		D
    DTC output from power window regulator motor assembly (for rear RH side)
    		E



B
Go to step 3

C
Go to step 7

D
Go to step 10

E
Go to step 13
A

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY (Click here)  

3.READ VALUE USING INTELLIGENT TESTER (D-Door Motor)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / D-Door Motor / Data List.

  1. Read the Data List according to the display on the intelligent tester.

    D-Door Motor (Power Window Regulator Motor Assembly (for Driver Side)) 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    D Door P/W Up SW
    		Driver door power window manual up switch signal / ON or OFF
    		ON: Driver door power window manual up switch operated
    OFF: Driver door power window manual up switch not operated
    		-
    D Door P/W Down SW
    		Driver door power window manual down switch signal / ON or OFF
    		ON: Driver door power window manual down switch operated
    OFF: Driver door power window manual down switch not operated
    		-

    OK:
    On the intelligent tester screen, ON or OFF is displayed accordingly.



NG
Go to step 4
OK

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Side) (Click here)  

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

  1. Disconnect the multiplex network master switch assembly connector.

  1. Disconnect the power window regulator motor assembly (for driver side) connector.

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

    Standard Resistance:
    for LHD 
    Tester Connection
    		Condition
    		Specified Condition
    K5-20 (UP) - Body ground
    		Always
    		10 kΩ or higher
    K5-15 (DOWN) - Body ground
    		Always
    		10 kΩ or higher
    K2-10 (UP) - Body ground
    		Always
    		10 kΩ or higher
    K2-7 (DOWN) - Body ground
    		Always
    		10 kΩ or higher
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    J9-20 (UP) - Body ground
    		Always
    		10 kΩ or higher
    J9-15 (DOWN) - Body ground
    		Always
    		10 kΩ or higher
    J2-10 (UP) - Body ground
    		Always
    		10 kΩ or higher
    J2-7 (DOWN) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

  1. Replace the multiplex network master switch assembly (Click here).


NEXT


6.CHECK FOR DTC

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC B2312 is not output.



NG
REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Side) (Click here)
OK

END (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WAS DEFECTIVE) 

7.READ VALUE USING INTELLIGENT TESTER (P-Door Motor)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / P-Door Motor / Data List.

  1. Read the Data List according to the display on the intelligent tester.

    P-Door Motor (Power Window Regulator Motor Assembly (for Front Passenger Side)) 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    P Door P/W Auto SW
    		Front passenger side power window auto up and down switch signal / ON or OFF
    		ON: Front passenger side door power window auto switch operated
    OFF: Front passenger side door power window auto switch not operated
    		-
    P Door P/W Up SW
    		Front passenger side power window manual up switch signal / ON or OFF
    		ON: Front passenger side door power window manual up switch operated
    OFF: Front passenger side door power window manual up switch not operated
    		-
    P Door P/W Down SW
    		Front passenger side power window manual down switch signal / ON or OFF
    		ON: Front passenger side door power window manual down switch operated
    OFF: Front passenger side door power window manual down switch not operated
    		-

    OK:
    On the intelligent tester screen, ON or OFF is displayed accordingly.



NG
Go to step 8
OK

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Side) (Click here)  

8.INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLY


    B203473E29

  1. Remove the power window regulator switch assembly (Click here).

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    6 (UP) - 1 (GND)
    		Auto up or up position
    		Below 1 Ω
    7 (DOWN) - 1 (GND)
    		Auto down or down position
    		Below 1 Ω
    8 (AUTO) - 1 (GND)
    		Auto up or auto down position
    		Below 1 Ω
    6 (UP) - 1 (GND)
    		Free
    		10 kΩ or higher
    7 (DOWN) - 1 (GND)
    		Free
    		10 kΩ or higher
    8 (AUTO) - 1 (GND)
    		Free
    		10 kΩ or higher

    Text in Illustration 
    *a
    		Component without harness connected
    (Power Window Regulator Switch Assembly)



NG
REPLACE POWER WINDOW REGULATOR SWITCH ASSEMBLY (Click here)
OK


9.CHECK HARNESS AND CONNECTOR (FRONT PASSENGER SIDE SWITCH - FRONT PASSENGER SIDE MOTOR)

  1. Disconnect the power window regulator motor assembly (for front passenger side) connector.

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

    Standard Resistance:
    for LHD 
    Tester Connection
    		Condition
    		Specified Condition
    J5-6 (UP) - Body ground
    		Always
    		10 kΩ or higher
    J5-8 (AUTO) - Body ground
    		Always
    		10 kΩ or higher
    J5-7 (DOWN) - Body ground
    		Always
    		10 kΩ or higher
    J2-10 (UP) - Body ground
    		Always
    		10 kΩ or higher
    J2-4 (AUTO) - Body ground
    		Always
    		10 kΩ or higher
    J2-7 (DOWN) - Body ground
    		Always
    		10 kΩ or higher
    for RHD 
    Tester Connection
    		Condition
    		Specified Condition
    K8-6 (UP) - Body ground
    		Always
    		10 kΩ or higher
    K8-8 (AUTO) - Body ground
    		Always
    		10 kΩ or higher
    K8-7 (DOWN) - Body ground
    		Always
    		10 kΩ or higher
    K2-10 (UP) - Body ground
    		Always
    		10 kΩ or higher
    K2-4 (AUTO) - Body ground
    		Always
    		10 kΩ or higher
    K2-7 (DOWN) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Side) (Click here)  

10.READ VALUE USING INTELLIGENT TESTER (RL-Door Motor)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / RL-Door Motor / Data List.

  1. Read the Data List according to the display on the intelligent tester.

    RL-Door Motor (Power Window Regulator Motor Assembly (for Rear LH Side)) 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    RL Door P/W Auto SW
    		Rear LH side power window auto up and down switch signal / ON or OFF
    		ON: Rear LH door power window auto switch operated
    OFF: Rear LH door power window auto switch not operated
    		-
    RL Door P/W Up SW
    		Rear LH side power window manual up switch signal / ON or OFF
    		ON: Rear LH door power window manual up switch operated
    OFF: Rear LH door power window manual up switch not operated
    		-
    RL Door P/W Down SW
    		Rear LH side power window manual down switch signal / ON or OFF
    		ON: Rear LH door power window manual down switch operated
    OFF: Rear LH door power window manual down switch not operated
    		-

    OK:
    On the intelligent tester screen, ON or OFF is displayed accordingly.



NG
Go to step 11
OK

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH side) (Click here)  

11.INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for LH Side)


    B203473E29

  1. Remove the rear power window regulator switch assembly (for LH side) (Click here).

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    6 (UP) - 1 (GND)
    		Auto up or up position
    		Below 1 Ω
    7 (DOWN) - 1 (GND)
    		Auto down or down position
    		Below 1 Ω
    8 (AUTO) - 1 (GND)
    		Auto up or auto down position
    		Below 1 Ω
    6 (UP) - 1 (GND)
    		Free
    		10 kΩ or higher
    7 (DOWN) - 1 (GND)
    		Free
    		10 kΩ or higher
    8 (AUTO) - 1 (GND)
    		Free
    		10 kΩ or higher

    Text in Illustration 
    *a
    		Component without harness connected
    (Rear Power Window Regulator Switch Assembly (for LH Side))



NG
REPLACE REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for LH side) (Click here)
OK


12.CHECK HARNESS AND CONNECTOR (REAR LH SWITCH - REAR LH MOTOR)

  1. Disconnect the power window regulator motor assembly (for rear LH side) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    M3-6 (UP) - Body ground
    		Always
    		10 kΩ or higher
    M3-7 (DOWN) - Body ground
    		Always
    		10 kΩ or higher
    M3-8 (AUTO) - Body ground
    		Always
    		10 kΩ or higher
    M2-10 (UP) - Body ground
    		Always
    		10 kΩ or higher
    M2-7 (DOWN) - Body ground
    		Always
    		10 kΩ or higher
    M2-4 (AUTO) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH side) (Click here)  

13.READ VALUE USING INTELLIGENT TESTER (RR-Door Motor)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / RR-Door Motor / Data List.

  1. Read the Data List according to the display on the intelligent tester.

    RR-Door Motor (Power Window Regulator Motor Assembly (for Rear RH Side)) 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    RR Door P/W Auto SW
    		Rear RH side power window auto up and down switch signal / ON or OFF
    		ON: Rear RH door power window auto switch operated
    OFF: Rear RH door power window auto switch not operated
    		-
    RR Door P/W Up SW
    		Rear RH side power window manual up switch signal / ON or OFF
    		ON: Rear RH door power window manual up switch operated
    OFF: Rear RH door power window manual up switch not operated
    		-
    RR Door P/W Down SW
    		Rear RH side power window manual down switch signal / ON or OFF
    		ON: Rear RH door power window manual down switch operated
    OFF: Rear RH door power window manual down switch not operated
    		-

    OK:
    On the intelligent tester screen, ON or OFF is displayed accordingly.



NG
Go to step 14
OK

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH side) (Click here)  

14.INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for RH Side)


    B203473E29

  1. Remove the rear power window regulator switch assembly (for RH side) (Click here).

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    6 (UP) - 1 (GND)
    		Auto up or up position
    		Below 1 Ω
    7 (DOWN) - 1 (GND)
    		Auto down or down position
    		Below 1 Ω
    8 (AUTO) - 1 (GND)
    		Auto up or auto down position
    		Below 1 Ω
    6 (UP) - 1 (GND)
    		Free
    		10 kΩ or higher
    7 (DOWN) - 1 (GND)
    		Free
    		10 kΩ or higher
    8 (AUTO) - 1 (GND)
    		Free
    		10 kΩ or higher

    Text in Illustration 
    *a
    		Component without harness connected
    (Rear Power Window Regulator Switch Assembly (for RH Side))



NG
REPLACE REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for RH side) (Click here)
OK


15.CHECK HARNESS AND CONNECTOR (REAR RH SWITCH - REAR RH MOTOR)

  1. Disconnect the power window regulator motor assembly (for rear RH side) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    L3-6 (UP) - Body ground
    		Always
    		10 kΩ or higher
    L3-7 (DOWN) - Body ground
    		Always
    		10 kΩ or higher
    L3-8 (AUTO) - Body ground
    		Always
    		10 kΩ or higher
    L2-10 (UP) - Body ground
    		Always
    		10 kΩ or higher
    L2-7 (DOWN) - Body ground
    		Always
    		10 kΩ or higher
    L2-4 (AUTO) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH side) (Click here)