DTC B2312: Power Window Switch Malfunction: Procedure

1. Clear the DTCs. Refer to DTC CHECK / CLEAR [06/2012 - ] .
2. Check for DTCs. Refer to DTC CHECK / CLEAR [06/2012 - ] .

   OK

   DTC B2312 is not output.

NG → See step   2 

OK → END (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 assembly	A
   DTC output from power window regulator motor assembly (for driver door)	B
   DTC output from power window regulator motor assembly (for front passenger door)	C
   DTC output from power window regulator motor assembly (for rear LH door)	D
   DTC output from power window regulator motor assembly (for rear RH door)	E

B → See step   3 

C → See step   7 

D → See step   10 

E → See step   13 

A → See step   16 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / D-Door Motor / Data List.
5. Read the Data List according to the display on the Techstream.
   D-DOOR MOTOR
   
   

   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 being operated OFF: Driver door power window manual up switch not being 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 being operated OFF: Driver door power window manual down switch not being operated	-

   OK

   On the Techstream screen, ON or OFF is displayed accordingly.

NG → See step   4 

OK → See step   20 

1. Disconnect the M4 multiplex network master switch assembly connector.
2. Disconnect the M8 power window regulator motor assembly (for driver door) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   M4-20 (UP) - Body ground	Always	10 kΩ or higher
   M4-15 (DOWN) - Body ground	Always	10 kΩ or higher
   M8-10 (UP) - Body ground	Always	10 kΩ or higher
   M8-7 (DOWN) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the multiplex network master switch assembly. Refer to REMOVAL [06/2012 - ] .

NEXT: Go to next step 

1. Clear the DTCs. Refer to DTC CHECK / CLEAR [06/2012 - ] .
2. Check for DTCs. Refer to DTC CHECK / CLEAR [06/2012 - ] .

   OK

   DTC B2312 is not output.

NG → See step   20 

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

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / P-Door Motor / Data List.
5. Read the Data List according to the display on the Techstream.
   P-DOOR MOTOR
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   P Door P/W Auto SW	Front passenger door power window auto switch signal / ON or OFF	ON: Front passenger door power window auto switch being operated OFF: Front passenger door power window auto switch not being operated	-
   P Door P/W Up SW	Front passenger door power window manual up switch signal / ON or OFF	ON: Front passenger door power window manual up switch being operated OFF: Front passenger door power window manual up switch not being operated	-
   P Door P/W Down SW	Front passenger door power window manual down switch signal / ON or OFF	ON: Front passenger door power window manual down switch being operated OFF: Front passenger door power window manual down switch not being operated	-

   OK

   On the Techstream screen, ON or OFF is displayed accordingly.

NG → See step   8 

OK → See step   21 

1. Remove the power window regulator switch assembly. Refer to REMOVAL [06/2012 - ] .

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	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)	Off	10 kΩ or higher
   7 (DOWN) - 1 (GND)	Off	10 kΩ or higher
   8 (AUTO) - 1 (GND)	Off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   17 

OK: Go to next step 

1. Disconnect the L9 power window regulator motor assembly (for front passenger door) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L4-6 (UP) - Body ground	Always	10 kΩ or higher
   L4-8 (AUTO) - Body ground	Always	10 kΩ or higher
   L4-7 (DOWN) - Body ground	Always	10 kΩ or higher
   L9-10 (UP) - Body ground	Always	10 kΩ or higher
   L9-4 (AUTO) - Body ground	Always	10 kΩ or higher
   L9-7 (DOWN) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   21 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / RL-Door Motor / Data List.
5. Read the Data List according to the display on the Techstream.
   RL-DOOR MOTOR
   
   

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

   OK

   On the Techstream screen, ON or OFF is displayed accordingly.

NG → See step   11 

OK → See step   22 

1. Remove the rear power window regulator switch assembly (for LH door). Refer to REMOVAL [06/2012 - ] .

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	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)	Off	10 kΩ or higher
   7 (DOWN) - 1 (GND)	Off	10 kΩ or higher
   8 (AUTO) - 1 (GND)	Off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Rear Power Window Regulator Switch Assembly (for LH Door))

NG → See step   18 

OK: Go to next step 

1. Disconnect the O2 power window regulator motor assembly (for rear LH door) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   O4-6 (UP) - Body ground	Always	10 kΩ or higher
   O4-7 (DOWN) - Body ground	Always	10 kΩ or higher
   O4-8 (AUTO) - Body ground	Always	10 kΩ or higher
   O2-10 (UP) - Body ground	Always	10 kΩ or higher
   O2-7 (DOWN) - Body ground	Always	10 kΩ or higher
   O2-4 (AUTO) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   22 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / RR-Door Motor / Data List.
5. Read the Data List according to the display on the Techstream.
   RR-DOOR MOTOR
   
   

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

   OK

   On the Techstream screen, ON or OFF is displayed accordingly.

NG → See step   14 

OK → See step   23 

1. Remove the rear power window regulator switch assembly (for RH door). Refer to REMOVAL [06/2012 - ] .

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	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)	Off	10 kΩ or higher
   7 (DOWN) - 1 (GND)	Off	10 kΩ or higher
   8 (AUTO) - 1 (GND)	Off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Rear Power Window Regulator Switch Assembly (for RH Door))

NG → See step   19 

OK: Go to next step 

1. Disconnect the N2 power window regulator motor assembly (for rear RH door) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   N4-6 (UP) - Body ground	Always	10 kΩ or higher
   N4-7 (DOWN) - Body ground	Always	10 kΩ or higher
   N4-8 (AUTO) - Body ground	Always	10 kΩ or higher
   N2-10 (UP) - Body ground	Always	10 kΩ or higher
   N2-7 (DOWN) - Body ground	Always	10 kΩ or higher
   N2-4 (AUTO) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   23