Back Door Entry Unlock Function does not Operate: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Smart Key / Data List.
5. Read the Data List according to the display on the Techstream.
   SMART KEY (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   B-Dr Opening Operation	Back door opening Operation / Long, Twice, OFF	Customization status displayed	-

   Result

   Result	Proceed to
   Customize setting is Long or Twice.	A
   Customize setting is OFF.	B

B → See step   11 

A: Go to next step 

1. When the door control switch on the master switch assembly is operated, check that the doors unlock and lock according to switch operation . Refer to OPERATION CHECK .

   OK

   Door locks operate normally.

NG → See step   10 

OK: Go to next step 

1. Enter the following menus: Body Electrical / Main Body / Active Test.
2. Perform the Active Test according to the display on the Techstream.
   MAIN BODY (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Trunk and Back-Door Open	Operate back door lock motor	ON or OFF	-

   OK

   The back door lock assembly unlatches when ON is selected.

NG → See step   10 

OK: Go to next step 

1. Enter the following menus: Body Electrical / Smart Key / Data List.
2. Read the Data List according to the display on the Techstream.
   SMART KEY (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Tr/B-Door Unlock SW	Back door opener switch assembly (opener switch) / ON or OFF	ON: Back door opener switch assembly (opener switch) pushed OFF: Back door opener switch assembly (opener switch) not pushed	-

   OK

   On the Techstream screen, the display changes between ON and OFF as shown in the chart above.

NG → See step   6 

OK → See step   5 

1. Remove the back door opener switch assembly . Refer to REMOVAL .
   Fig 1: Identifying Back Door Opener Switch Assembly Connector Terminals

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

   Standard Resistance

   Tester Connection	Switch Position	Specified Condition
   2 (E) - 3 (UL)	Back door opener switch assembly (opener switch) not pushed (OFF)	10 kΩ or higher
   2 (E) - 3 (UL)	Back door opener switch assembly (opener switch) pushed (ON)	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Back Door Opener Switch Assembly)

NG → See step   9 

OK: Go to next step 

1. Disconnect the certification ECU (smart key ECU Assembly) connector.
   Fig 2: Identifying Certification ECU And Back Door Opener Switch Assembly Connector Terminals

   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
   L62-22 (TSW5) - V4-3 (UL)	Always	Below 1 Ω
   L62-22 (TSW5) - Body ground	Always	10 kΩ or higher
   V4-3 (UL) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Certification ECU (Smart Key ECU Assembly))
   *2	Front view of wire harness connector (to Back Door Opener Switch Assembly)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8