Back Door Entry Lock and Unlock Functions do not Operate: Procedure

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   9 

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 / 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/Display	Normal Condition	Diagnostic Note
   Tr/B-Door Lock SW	Back door opener switch assembly (lock switch) / ON or OFF	ON: Back door opener switch assembly (lock switch) pushed OFF: Back door opener switch assembly (lock switch) not pushed	-
   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 table above.

NG → See step   8 

OK: Go to next step 

1. Bring the key near the electrical key antenna (for rear side), and perform an entry back door open and entry lock functions check.
   Fig 1: Identifying Vehicle Center

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1	Approximately 0.3 m
   *2	Vehicle Center

   NOTE:

   If the key is brought within 0.2 m (0.656 ft.) of the rear bumper, communication is not possible.

   HINT: 

   • When pressing the lock switch and pressing the opener switch, hold the electrical key transmitter about 1 m (3.28 ft.) above the ground and about 0.3 m (0.984 ft.) away from the vehicle as shown in the illustration.
   • When the key is brought near the electrical key antenna (for rear side), the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
   • If the operation is normal, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation.

   OK

   Entry functions operate normally.

NG → See step   4 

OK → AFFECTED BY WAVE INTERFERENCE 

1. Diagnostic mode inspection (electrical key antenna (for rear side))
   Fig 2: Identifying Vehicle Center

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1	0.7 to 1.0 m
   *2	Vehicle Center

   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 / Utility / Key Communication Check / Overhead + Back Door.
   5. When the electrical key transmitter is in the position shown in the illustration, check that the wireless door lock buzzer sounds.

      HINT: 

      • Hold the electrical key transmitter at the same height as the rear bumper upper surface and align with the center of the rear of the vehicle (0.7 to 1.0 m (2.30 to 3.28 ft.)). Make sure that the direction of the key is as shown in the illustration.
      • If the buzzer sounds, it can be determined that the electrical key antenna (for rear side) is operating normally.

      OK

      Wireless door lock buzzer sounds.

NG → See step   5 

OK → See step   10 

1. Disconnect the certification ECU (smart key ECU assembly) connector.
2. Disconnect the electrical key antenna (for rear side) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L63-19 (CLG8) - R19-1 (ANTE8)	Always	Below 1 Ω
   L63-20 (CG8B) - R19-2 (CLGB)	Always	Below 1 Ω
   L63-19 (CLG8) - Body ground	Always	10 kΩ or higher
   L63-20 (CG8B) - Body ground	Always	10 kΩ or higher
   R19-1 (ANTE8) - Body ground	Always	10 kΩ or higher
   R19-2 (CLGB) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 3: Inspecting R19 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   R19-1 (ANTE8) - R19-2 (CLGB)	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Electrical Key Antenna (for Rear Side))

NG → See step   6 

OK → See step   10 

1. Disconnect the back door opener switch assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   V4-2 (E) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   11