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 .

   OK

   DTC B2312 is not output.

NG → See step   2 

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

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to 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 Auto SW	Driver door power window auto switch signal / ON or OFF	ON: Driver door power window auto switch operated OFF: Driver door power window auto switch not operated	-
   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 Techstream screen, ON or OFF is displayed accordingly.

NG → See step   3 

OK → See step   5 

1. Disconnect the J1 power window regulator master switch assembly connector.
2. Disconnect the J3 power window regulator motor assembly LH (for driver door) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   W/ REAR POWER WINDOW
   
   

   Tester Connection	Condition	Specified Condition
   J1-8 (U) - Body ground	Always	10 kΩ or higher
   J1-5 (D) - Body ground	Always	10 kΩ or higher
   J1-4 (AUTO) - Body ground	Always	10 kΩ or higher
   J3-10 (UP) - Body ground	Always	10 kΩ or higher
   J3-7 (DOWN) - Body ground	Always	10 kΩ or higher
   J3-4 (AUTO) - Body ground	Always	10 kΩ or higher

   W/O REAR POWER WINDOW
   
   

   Tester Connection	Condition	Specified Condition
   J1-18 (U) - Body ground	Always	10 kΩ or higher
   J1-10 (D) - Body ground	Always	10 kΩ or higher
   J1-1 (AUTO) - Body ground	Always	10 kΩ or higher
   J3-10 (UP) - Body ground	Always	10 kΩ or higher
   J3-7 (DOWN) - Body ground	Always	10 kΩ or higher
   J3-4 (AUTO) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the power window regulator master switch assembly. Refer to REMOVAL .
   Fig 1: Power Window Regulator Master Switch Assembly Connector

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

   Standard Resistance

   (W/ REAR POWER WINDOW)
   
   

   Tester Connection	Condition	Specified Condition
   8 (U) - 1 (E)	Released	10 kΩ or higher
   8 (U) - 4 (AUTO)	Released	10 kΩ or higher
   4 (AUTO) - 1 (E)	Released	10 kΩ or higher
   5 (D) - 1 (E)	Released	10 kΩ or higher
   4 (AUTO) - 5 (D)	Released	10 kΩ or higher

   (W/O REAR POWER WINDOW)
   
   

   Tester Connection	Condition	Specified Condition
   18 (U) - 7 (E)	Released	10 kΩ or higher
   18 (U) - 1 (AUTO)	Released	10 kΩ or higher
   1 (AUTO) - 7 (E)	Released	10 kΩ or higher
   10 (D) - 7 (E)	Released	10 kΩ or higher
   1 (AUTO) - 10 (D)	Released	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *A	w/ Rear Power Window
   *B	w/o Rear Power Window
   *a	Component without harness connected (Power Window Regulator Master Switch Assembly)

NG → See step   6 

OK → See step   5