Back Door Entry Lock Function does not Operate: Procedure

1. When the door control switch of the master switch assembly is operated, check that the locked doors unlock.

   OK

   Door locks operate normally.

NG → See step   8 

OK: Go to next step 

1. Check if the power back door is equipped on the vehicle.
   RESULT
   
   

   Result	Proceed to
   w/ Power Back Door System	A
   w/o Power Back Door System	B

B → See step   4 

A: Go to next step 

1. When the power back door switch is operated, check that the power back door closes.

   OK

   Power back door is closes.

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B

B → See step   5 

A → See step   9 

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 / Main Body / Data List.
5. Read the Data List according to the display on the Techstream.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Back Lock Pos switch	Back door lock position switch signal / ON or OFF	ON: Back door unlocked OFF: Back door locked	-

   OK

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

NG → See step   11 

OK: Go to next step 

1. Using the Techstream, read the Data List.
   SMART ACCESS
   
   

   Tester Display	Measurement Item/Display	Normal Condition	Diagnostic Note
   Tr/B-Door Lock SW	Back door lock switch / ON or OFF	ON: Back door lock switch pushed OFF: Back door lock switch not pushed	-

   OK

   "ON" (switch is pushed) and "OFF" (switch is not pushed) appears on the screen.

NG → See step   6 

OK → REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

1. Measure the resistance according to the value(s) in the table below.
   Fig 1: Checking Back Door Opener Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 (UL) - 2 (L)	Lock switch pushed	Below 1 Ω
   1 (UL) - 2 (L)	Lock switch not pushed	10 kΩ or higher

NG → See step   10 

OK: Go to next step 

1. Disconnect the E29 ECU connector.
   Fig 2: Identifying E29 ECU Connector And S7 Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the S7 switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E29-7 (TSW5) - S7-1 (UL)	Always	Below 1 Ω
   E29-7 (TSW5) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)