Auto Up / Down Function does not Operate: Procedure

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

   Result	Proceed to
   DTC is not output	A
   DTC B2311 is output	B
   DTC B2312 is output	C
   DTC B2313 is output	D
   LIN communication system DTCs are output	E

B → See step   8 

C → See step   9 

D → See step   10 

E → See step   11 

A: Go to next step 

1. Check that the manual up/down function using the back door power window regulator switch can operate the multiplex network door ECU. Refer to OPERATION CHECK .

   OK

   Manual up/down function operates.

NG → See step   12 

OK: Go to next step 

1. Use the Data List to check if the back door power window regulator switch is functioning properly. Refer to DATA LIST / ACTIVE TEST .
   BACK DOOR P/W
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Inside Back Door P/W Auto SW	Back door power window regulator switch auto up/down signal / ON or OFF	ON: Back door power window regulator auto up/down switch operated OFF: Back door power window regulator switch not operated	-

   OK

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

NG → See step   6 

OK: Go to next step 

1. Disconnect the W9 back door power window regulator motor connector.
2. Disconnect the W10 multiplex network door ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   W9-4 (AUTO) - W10-12 (AUT2)	Always	Below 1 Ω
   W9-1 (GND) - W10-1 (E4)	Always	Below 1 Ω
   W9-4 (AUTO) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the multiplex network door ECU.
   Fig 1: Identifying Multiplex Network Door ECU (Back Door P/W) & Waveform

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

   Standard Voltage

   Tester Connection	Tool Setting	Switch Condition	Specified Condition
   W10-12 (AUT2) - W10-1 (E4)	2 V/DIV., 100 ms/DIV.	Ignition switch ON, back door power window auto up or auto down function operating	Pulse generation (See waveform 1 in Fig 1)

NG → See step   13 

OK → See step   15 

1. Remove the back door power window regulator switch. Refer to REMOVAL .
   Fig 2: Identifying Back Door Power Window Regulator Switch Assembly 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
   8 (AUTO) - 1 (E)	Auto up/down operation	Below 1 Ω
   8 (AUTO) - 1 (E)	Not operated	10 kΩ or higher

NG → See step   14 

OK: Go to next step 

1. Disconnect the f1 back door power window regulator switch connector.
2. Disconnect the V2 multiplex network door ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   f1-8 (AUTO) - V2-21 (AUTO)	Always	Below 1 Ω
   f1-1 (E) - Body ground	Always	Below 1 Ω
   f1-8 (AUTO) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   13