Only Back Door cannot be Opened: Procedure

1. Check the vehicle specification.

   Result

   Result	Proceed to
   w/o Entry System Back Door Open Function	A
   w/ Entry System Back Door Open Function	B

B → See step   6 

A: Go to next step 

1. Check the power door lock basic function. Refer to OPERATION CHECK .

   OK

   The power door lock basic functions operate normally.

NG → See step   14 

OK: Go to next step 

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 / Main Body / Data List.
5. Read the Data List according to the display on the Techstream.
   MAIN BODY (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Back Door Open	Back door lock/Permit or Prohibt	Permit: Back door unlocked Prohibt: Back door locked	-

   OK

   The Techstream indicates Permit or Prohibit according to the door lock operation shown in the table.

NG → See step   15 

OK: Go to next step 

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 / Main Body / Active Test.
5. 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   6 

OK: Go to next step 

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 / Main Body / Data List.
5. Read the Data List according to the display on the Techstream.
   MAIN BODY (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Back Door Open Handle SW	Back door opener switch signal/ON or OFF	ON: Back door opener switch pushed OFF: Back door opener switch not pushed	-

   OK

   The Techstream indicates ON or OFF according to the switch operation shown in the table.

NG → See step   10 

OK → See step   15 

1. Remove the back door lock assembly. Refer to REMOVAL .
   Fig 1: Inspecting Back Door Lock Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the operation of the door lock motor.
   1. Move the door lock to the lock position.
   2. Apply auxiliary battery voltage to the door lock motor and check the operation of the door lock motor.

      OK

      Connection	Result
      Auxiliary battery positive (+) → Terminal 4 (ACT+) Auxiliary battery negative (-) → Terminal 3 (ACT-)	Unlocks

3. Check the operation of the door courtesy switch.
   1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Switch Condition	Specified Condition
      2 (+) - 1 (E)	Locked	10 kΩ or higher
      2 (+) - 1 (E)	Unlocked	Below 1 Ω

      TEXT IN ILLUSTRATION
      
      

      *a	Component without harness connected (Back Door Lock Assembly)
      *b	Lock
      *c	Unlock

NG → See step   12 

OK: Go to next step 

1. Disconnect the main body ECU (multiplex network body ECU) connector.
2. Disconnect the instrument panel junction block assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   R18-4 (ACT+) - 2D-9	Always	Below 1 Ω
   R18-4 (ACT+) - Body ground	Always	10 kΩ or higher
   R18-2 (+) - L7-19 (BCTY)	Always	Below 1 Ω
   R18-2 (+) - Body ground	Always	10 kΩ or higher
   R18-3 (ACT-) - Body ground	Always	Below 1 Ω
   R18-1 (E) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the instrument panel junction block assembly. Refer to REMOVAL .

NEXT: Go to next step 

1. Check that the back door can be opened.

   OK

   The back door can be opened normally.

NG → See step   15 

OK → END (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY WAS DEFECTIVE) 

1. Remove the back door opener switch assembly. Refer to REMOVAL .
   Fig 2: Inspecting Back Door Opener Switch Assembly

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

   Standard Resistance

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

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   13 

OK: Go to next step 

1. Disconnect the main body ECU (multiplex network body ECU) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   V4-3 (UL) - L7-23 (BDSU)	Always	Below 1 Ω
   V4-3 (UL) - Body ground	Always	10 kΩ or higher
   V4-2 (E) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   15