DTC B2312: Power Window Switch Malfunction: Procedure

1. Clear the DTCs. Refer to DTC CHECK / CLEAR .

NEXT: Go to next step 

1. Check for DTCs. Refer to DTC CHECK / CLEAR .
   RESULT
   
   

   Result	Proceed to
   B2312 is output.	A
   LIN communication DTCs are output.	B
   No DTCs output.	C

B → See step   17 

C → END (DUE TO KEEPING SWITCH OPERATED FOR 20 SEC. OR MORE) 

A: Go to next step 

1. Check where DTC B2312 is output from.
   RESULT
   
   

   Result	Proceed to
   B2312 output from multiplex network master switch.	A
   B2312 output from front power window regulator motor LH.	B
   B2312 output from front power window regulator motor RH.	C
   B2312 output from rear power window regulator motor LH.	D
   B2312 output from rear power window regulator motor RH.	E

B → See step   4 

C → See step   6 

D → See step   9 

E → See step   12 

A → See step   18 

1. Use the Data List to check if the power window regulator motor is functioning properly. Refer to DATA LIST / ACTIVE TEST .
   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 signal / ON or OFF	ON: Driver side power window auto up/down switch operated OFF: Driver side power window switch not operated	-
   D Door P/W Up SW	Driver side power window manual up signal / ON or OFF	ON: Driver side power window manual up switch operated OFF: Driver side power window switch not operated	-
   D Door P/W Down SW	Driver side power window manual down signal / ON or OFF	ON: Driver side power window manual down switch operated OFF: Driver side power window switch not operated	-

   OK

   The Techstream display changes according to operation of the master switch.

NG → See step   5 

OK → See step   16 

1. Disconnect I11 switch connector.
   Fig 1: Identifying I11 Switch Connector & I12 Motor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect I12 motor connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I11-20 (UP) - I12-10 (UP)	Always	Below 1 Ω
   I11-15 (DOWN) - I12-7 (DOWN)	Always	Below 1 Ω
   I11-20 (UP) or I12-10 (UP) - Body ground	Always	10 kΩ or higher
   I11-15 (DOWN) or I12-7 (DOWN) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   16 

1. Use the Data List to check if the power window regulator motor is functioning properly. Refer to DATA LIST / ACTIVE TEST .
   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 signal / ON or OFF	ON: Front passenger side power window auto up/down switch operated OFF: Power window regulator switch not operated	-
   P Door P/W Up SW	Front passenger side power window manual up signal / ON or OFF	ON: Front passenger side power window manual up switch operated OFF: Power window regulator switch not operated	-
   P Door P/W Down SW	Front passenger side power window manual down signal / ON or OFF	ON: Front passenger side power window manual down switch operated OFF: Power window regulator switch not operated	-

   OK

   The Techstream display changes according to operation of the power window regulator switch.

NG → See step   7 

OK → See step   19 

Fig 2: Identifying Power Window Regulator Switch Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the power window regulator switch. Refer to REMOVAL .
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   I3-6 (UP) - I3-1 (GND)	Manual up operation	Below 1 Ω
   I3-7 (DOWN) - I3-1 (GND)	Manual down operation	Below 1 Ω
   I3-8 (AUTO) - I3-1 (GND)	Auto up/down operation	Below 1 Ω
   I3-6 (UP) - I3-1 (GND)	Not operated	10 kΩ or higher
   I3-7 (DOWN) - I3-1 (GND)	Not operated	10 kΩ or higher
   I3-8 (AUTO) - I3-1 (GND)	Not operated	10 kΩ or higher

NG → See step   15 

OK: Go to next step 

1. Disconnect the I3 switch connector.
   Fig 3: Identifying I3 Switch Connector Terminal & I4 Motor Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the I4 motor connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I3-6 (UP) - I4-10 (UP)	Always	Below 1 Ω
   I3-7 (DOWN) - I4-7 (DOWN)	Always	Below 1 Ω
   I3-8 (AUTO) - I4-4 (AUTO)	Always	Below 1 Ω
   I3-6 (UP) or I4-10 (UP) - Body ground	Always	10 kΩ or higher
   I3-7 (DOWN) or I4-7 (DOWN) - Body ground	Always	10 kΩ or higher
   I3-8 (AUTO) or I4-4 (AUTO) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   19 

1. Use the Data List to check if the power window regulator motor is functioning properly. Refer to DATA LIST / ACTIVE TEST .
   RL-DOOR MOTOR
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   RL Door P/W Auto SW	Rear power window LH auto up/down signal / ON or OFF	ON: Rear power window LH auto up/down switch operated OFF: Rear power window LH switch not operated	-
   RL Door P/W Up SW	Rear power window LH manual up signal / ON or OFF	ON: Rear power window LH manual up switch operated OFF: Rear power window LH switch not operated	-
   RL Door P/W Down SW	Rear power window LH manual down signal / ON or OFF	ON: Rear power window LH manual down switch operated OFF: The rear power window LH switch not operated	-

   OK

   The Techstream display changes according to operation of the rear power window switch LH.

NG → See step   10 

OK → See step   21 

Fig 4: Identifying Rear Power Window Regulator Switch Connector Terminal LH

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the rear power window regulator switch. Refer to REMOVAL .
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   J10-6 (UP) - J10-1 (GND)	Manual up operation	Below 1 Ω
   J10-8 (AUTO) - J10-1 (GND)	Auto up/down operation	Below 1 Ω
   J10-7 (DOWN) - J10-1 (GND)	Manual down operation	Below 1 Ω
   J10-6 (UP) - J10-1 (GND)	Not operated	10 kΩ or higher
   J10-8 (AUTO) - J10-1 (GND)	Not operated	10 kΩ or higher
   J10-7 (DOWN) - J10-1 (GND)	Not operated	10 kΩ or higher

NG → See step   20 

OK: Go to next step 

1. Disconnect the J10 switch connector.
   Fig 5: Identifying J10 Switch Connector & J11 Motor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the J11 motor connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J10-6 (UP) - J11-10 (UP)	Always	Below 1 Ω
   J10-7 (DOWN) - J11-7 (DOWN)	Always	Below 1 Ω
   J10-8 (AUTO) - J11-4 (AUTO)	Always	Below 1 Ω
   J10-6 (UP) or J11-10 (UP) - Body ground	Always	10 kΩ or higher
   J10-7 (DOWN) or J11-7 (DOWN) - Body ground	Always	10 kΩ or higher
   J10-8 (AUTO) or J11-4 (AUTO) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   21 

1. Use the Data List to check if the power window regulator motor is functioning properly. Refer to DATA LIST / ACTIVE TEST .
   RR-DOOR MOTOR
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   RR Door P/W Auto SW	Rear power window RH auto up/down signal / ON or OFF	ON: The rear power window RH auto up/down switch operated OFF: The rear power window RH switch not operated	-
   RR Door P/W Up SW	Rear power window RH manual up signal / ON or OFF	ON: The rear power window RH manual up switch operated OFF: The rear power window RH switch not operated	-
   RR Door P/W Down SW	Rear power window RH manual down signal / ON or OFF	ON: The rear power window RH manual down switch operated OFF: The rear power window RH switch not operated	-

   OK

   The Techstream display changes according to operation of the rear power window switch RH.

NG → See step   13 

OK → See step   23 

Fig 6: Identifying Rear Power Window Regulator Switch RH

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the rear power window regulator switch RH. Refer to REMOVAL .
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   J3-6 (UP) - J3-1 (GND)	Manual up operation	Below 1 Ω
   J3-8 (AUTO) - J3-1 (GND)	Auto up/down operation	Below 1 Ω
   J3-7 (DOWN) - J3-1 (GND)	Manual down operation	Below 1 Ω
   J3-6 (UP) - J3-1 (GND)	Not operated	10 kΩ or higher
   J3-8 (AUTO) - J3-1 (GND)	Not operated	10 kΩ or higher
   J3-7 (DOWN) - J3-1 (GND)	Not operated	10 kΩ or higher

NG → See step   22 

OK: Go to next step 

Fig 7: Identifying J4 Motor Connector & J3 Switch Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the J3 switch connector.
2. Disconnect the J4 motor connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J3-6 (UP) - J4-10 (UP)	Always	Below 1 Ω
   J3-7 (DOWN) - J4-7 (DOWN)	Always	Below 1 Ω
   J3-8 (AUTO) - J4-4 (AUTO)	Always	Below 1 Ω
   J3-6 (UP) or J4-10 (UP) - Body ground	Always	10 kΩ or higher
   J3-7 (DOWN) or J4-7 (DOWN) - Body ground	Always	10 kΩ or higher
   J3-8 (AUTO) or J4-4 (AUTO) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   23