DTC B2312: Power Window Switch Malfunction: Procedure

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

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

B → See step   22 

C → See step   2 

A → 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 LH	D
   DTC output from rear power window regulator motor RH	E

B → See step   3 

C → See step   5 

D → See step   8 

E → See step   11 

A → See step   14 

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

NG → See step   4 

OK → See step   18 

1. Disconnect the h1 multiplex network master switch connector.
2. Disconnect the I2 power window regulator motor connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   h1-20 (UP) - I2-10 (UP)	Always	Below 1 Ω
   h1-15 (DOWN) - I2-7 (DOWN)	Always	Below 1 Ω
   h1-20 (UP) - Body ground	Always	10 kΩ or higher
   h1-15 (DOWN) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → 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 .
   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 tester screen, each item changes between ON and OFF according to above chart.

NG → See step   6 

OK → See step   19 

1. Remove the power window regulator switch. Refer to INSPECTION .
   Fig 1: Identifying Power Window Regulator Switch Connector

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

NG → See step   15 

OK: Go to next step 

1. Disconnect the g1 power window regulator switch connector.
2. Disconnect the H2 power window regulator motor connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   g1-6 (UP) - H2-10 (UP)	Always	Below 1 Ω
   g1-7 (DOWN) - H2-7 (DOWN)	Always	Below 1 Ω
   g1-8 (AUTO) - H2-4 (AUTO)	Always	Below 1 Ω
   g1-6 (UP) - Body ground	Always	10 kΩ or higher
   g1-7 (DOWN) - Body ground	Always	10 kΩ or higher
   g1-8 (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: Rear power window LH switch not operated	-

   OK

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

NG → See step   9 

OK → See step   20 

1. Remove the rear power window regulator switch. Refer to REMOVAL .
   Fig 2: Identifying Power Window Regulator Switch Connector

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

NG → See step   16 

OK: Go to next step 

1. Disconnect the j1 rear power window regulator switch connector.
2. Disconnect the K2 rear power window regulator motor connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   j1-6 (UP) - K2-10 (UP)	Always	Below 1 Ω
   j1-7 (DOWN) - K2-7 (DOWN)	Always	Below 1 Ω
   j1-8 (AUTO) - K2-4 (AUTO)	Always	Below 1 Ω
   j1-6 (UP) - Body ground	Always	10 kΩ or higher
   j1-7 (DOWN) - Body ground	Always	10 kΩ or higher
   j1-8 (AUTO) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   20 

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: 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 tester screen, each item changes between ON and OFF according to above chart.

NG → See step   12 

OK → See step   21 

1. Remove the rear power window regulator switch. Refer to REMOVAL .
   Fig 3: Identifying Power Window Regulator Switch Connector

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

NG → See step   17 

OK: Go to next step 

1. Disconnect the i1 rear power window regulator switch connector.
2. Disconnect the J2 rear power window regulator motor connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   i1-6 (UP) - J2-10 (UP)	Always	Below 1 Ω
   i1-7 (DOWN) - J2-7 (DOWN)	Always	Below 1 Ω
   i1-8 (AUTO) - J2-4 (AUTO)	Always	Below 1 Ω
   i1-6 (UP) - Body ground	Always	10 kΩ or higher
   i1-7 (DOWN) - Body ground	Always	10 kΩ or higher
   i1-8 (AUTO) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   21