DTC B2312: Power Window Switch Malfunction: Procedure

1. Clear the DTC. Refer to DTC CHECK / CLEAR [12/2011 - ] .
2. Check for DTCs. Refer to DTC CHECK / CLEAR [12/2011 - ] .

   OK

   No DTCs output.

NG → See step   2 

OK → END (DTC WAS STORED DUE TO SWITCH BEING OPERATED FOR 20 SECONDS OR MORE) 

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

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

B → See step   3 

C → See step   6 

D → See step   9 

E → See step   12 

A → See step   15 

1. Use the Data List to check if the power window regulator motor is functioning properly. Refer to DATA LIST / ACTIVE TEST [12/2011 - ] .
   D-DOOR MOTOR
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   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

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

NG → See step   4 

OK → See step   20 

1. Disconnect the Q25 multiplex network master switch connector.
2. Disconnect the Q17 power window regulator motor LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q25-20 (UP) - Q17-10 (UP1)	Always	Below 1 Ω
   Q25-15 (DOWN) - Q17-7 (DWN1)	Always	Below 1 Ω
   Q25-20 (UP) - Body ground	Always	10 kΩ or higher
   Q25-15 (DOWN) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the multiplex network master switch assembly with a new or normally functioning one. Refer to REMOVAL [12/2011 - ] .
2. Clear the DTCs. Refer to DTC CHECK / CLEAR [12/2011 - ] .
3. Check for DTCs. Refer to DTC CHECK / CLEAR [12/2011 - ] .

   OK

   No DTCs output.

NG → See step   20 

OK → END (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WAS DEFECTIVE) 

1. Use the Data List to check if the power window regulator motor is functioning properly. Refer to DATA LIST / ACTIVE TEST [12/2011 - ] .
   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: Front passenger side 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: Front passenger side 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: Front passenger side power window regulator switch not operated	-

   OK

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

NG → See step   7 

OK → See step   19 

1. Remove the front power window regulator switch RH. Refer to REMOVAL [12/2011 - ] .

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   2 (UP) - 5 (GND)	Manual up operation	Below 1 Ω
   10 (DOWN) - 5 (GND)	Manual down operation	Below 1 Ω
   4 (AUTO) - 5 (GND)	Auto up/down operation	Below 1 Ω
   2 (UP) - 5 (GND)	Not operated	10 kΩ or higher
   10 (DOWN) - 5 (GND)	Not operated	10 kΩ or higher
   4 (AUTO) - 5 (GND)	Not operated	10 kΩ or higher

NG → See step   16 

OK: Go to next step 

1. Disconnect the Q9 front power window regulator switch RH connector.
2. Disconnect the Q2 front power window regulator motor RH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q9-2 (UP) - Q2-10 (UP1)	Always	Below 1 Ω
   Q9-10 (DOWN) - Q2-7 (DWN1)	Always	Below 1 Ω
   Q9-4 (AUTO) - Q2-4 (AUTO)	Always	Below 1 Ω
   Q9-2 (UP) - Body ground	Always	10 kΩ or higher
   Q9-10 (DOWN) - Body ground	Always	10 kΩ or higher
   Q9-4 (AUTO) - 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 [12/2011 - ] .
   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: Rear power window RH auto up/down switch operated OFF: Rear power window RH switch not operated	-
   RR Door P/W Up SW	Rear power window RH manual up signal / ON or OFF	ON: Rear power window RH manual up switch operated OFF: Rear power window RH switch not operated	-
   RR Door P/W Down SW	Rear power window RH manual down signal / ON or OFF	ON: Rear power window RH manual down switch operated OFF: Rear power window RH switch not operated	-

   OK

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

NG → See step   10 

OK → See step   21 

1. Remove the rear power window regulator switch RH. Refer to REMOVAL [12/2011 - ] .

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   2 (UP) - 5 (GND)	Manual up operation	Below 1 Ω
   10 (DOWN) - 5 (GND)	Manual down operation	Below 1 Ω
   4 (AUTO) - 5 (GND)	Auto up/down operation	Below 1 Ω
   2 (UP) - 5 (GND)	Not operated	10 kΩ or higher
   10 (DOWN) - 5 (GND)	Not operated	10 kΩ or higher
   4 (AUTO) - 5 (GND)	Not operated	10 kΩ or higher

NG → See step   17 

OK: Go to next step 

1. Disconnect the R6 rear power window regulator switch RH connector.
2. Disconnect the R1 rear power window regulator motor RH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   R6-2 (UP) - R1-10 (UP1)	Always	Below 1 Ω
   R6-10 (DOWN) - R1-7 (DWN1)	Always	Below 1 Ω
   R6-4 (AUTO) - R1-4 (AUTO)	Always	Below 1 Ω
   R6-2 (UP) - Body ground	Always	10 kΩ or higher
   R6-10 (DOWN) - Body ground	Always	10 kΩ or higher
   R6-4 (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 [12/2011 - ] .
   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: Rear power window LH switch not operated	-

   OK

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

NG → See step   13 

OK → See step   22 

1. Remove the rear power window regulator switch LH. Refer to REMOVAL [12/2011 - ] .

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   2 (UP) - 5 (GND)	Manual up operation	Below 1 Ω
   10 (DOWN) - 5 (GND)	Manual down operation	Below 1 Ω
   4 (AUTO) - 5 (GND)	Auto up/down operation	Below 1 Ω
   2 (UP) - 5 (GND)	Not operated	10 kΩ or higher
   10 (DOWN) - 5 (GND)	Not operated	10 kΩ or higher
   4 (AUTO) - 5 (GND)	Not operated	10 kΩ or higher

NG → See step   18 

OK: Go to next step 

1. Disconnect the R14 rear power window regulator switch LH connector.
2. Disconnect the R9 rear power window regulator motor LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   R14-2 (UP) - R9-10 (UP1)	Always	Below 1 Ω
   R14-10 (DOWN) - R9-7 (DWN1)	Always	Below 1 Ω
   R14-4 (AUTO) - R9-4 (AUTO)	Always	Below 1 Ω
   R14-2 (UP) - Body ground	Always	10 kΩ or higher
   R14-10 (DOWN) - Body ground	Always	10 kΩ or higher
   R14-4 (AUTO) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   22