Inspection Procedure

1. Check that the back door power window operates via the back door power window switch.

   OK: Manual UP/DOWN function operates normally. 

NG: GO TO OTHER FLOW CHART (BACK DOOR POWER WINDOW CIRCUIT)  (See MANUAL UP / DOWN FUNCTION DOES NOT OPERATE ON BACK DOOR ONLY  )

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Back Door P/W / Data List.
5. According to the display on the Techstream, read the Data List.

   Back Door P/W 

   BACK DOOR P/W REFERENCE CHART
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Key Switch Operation Locked	Back door key lock and unlock switch signal / ON or OFF	ON: Back door lock key cylinder is turned to unlock OFF: Key is in back door lock key cylinder (original position)	-
   Key Switch Operation Unlocked	Back door key lock and unlock switch signal / ON or OFF	ON: Back door lock key cylinder is turned to unlock OFF: Key is in back door lock key cylinder (original position)	-

   OK: The Techstream display changes normally when tail gate control switch is operated. 

NG: Go to step 3 

OK: REPLACE BACK DOOR ECU  (See DISASSEMBLY )

1. Remove the tail gate control switch (See DISASSEMBLY ).
2. Insert the key into the key cylinder.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Switch Condition	Specified Condition
   1 (UL) - 3 (E)	Turn key to unlock position	Below 1 Ω
   	Turn key to lock position	10 kΩ or higher
   2 (L) - 3 (E)	Turn key to unlock position	10 kΩ or higher
   	Turn key to lock position	Below 1 Ω

   Fig 1: Identifying Tail Gate Control Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Reinstall the tail gate control switch.

NG: REPLACE TAIL GATE CONTROL SWITCH  (See DISASSEMBLY )

OK: Go to next step 

1. Disconnect the V3 back door ECU connector.
2. Disconnect the V18 tail gate control switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   V3-7 (BKUL) - V18-1 (UL)	Always	Below 1 Ω
   V3-8 (BKL) - V18-2 (L)	Always	Below 1 Ω
   V3-19 (KEYE) - V18-3 (E)	Always	Below 1 Ω
   V18-1 (UL) - Body ground	Always	10 kΩ or higher
   V18-2 (L)- Body ground	Always	10 kΩ or higher
   V18-V 18-3 (E) - Body ground	Always	10 kΩ or higher

4. Reconnect the tail gate control switch connector.
5. Reconnect the back door ECU connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Identifying V18 Back Door ECU And V3 Tail Gate Control Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE BACK DOOR ECU  (See DISASSEMBLY )