Power Back Door cannot be Operated Using Any Switch: Procedure

1. Check that the back door motor unit (power back door ECU) can be initialized, refer to INITIALIZATION .

NEXT: Go to next step 

1. Check the power back door system operation.

   OK

   Power back door system operates normally.

NG → See step   3 

OK → END 

1. Check the back door closer system operation, refer to OPERATION CHECK .

NG → See step   13 

OK: Go to next step 

1. Check the A/T shift position indicator operation.
2. Check that the speedometer indicates 0 mph when the vehicle is stopped and the engine idling.

NG → See step   14 

OK: Go to next step 

1. Check for the DTCs, refer to DTC CHECK / CLEAR .

   Result

   Result	Proceed to
   DTC is not output	A
   B2250 is output	B
   B2251 is output	C

B → See step   15 

C → See step   18 

A: Go to next step 

1. Check the Data List to determine if the back door lock function properly.
   MAIN BODY (MAIN BODY ECU)
   
   

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

   OK

   The back door functions as specified in the normal condition.

NG → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) 

OK: Go to next step 

1. Check the Data List to determine if the power back door touch sensor function properly.
   BACK DOOR (POWER BACK DOOR ECU)
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   PBD Touch Sen L	Power back door touch sensor LH signal / ON or OFF	ON: Power back door touch sensor LH pressed OFF: Power back door touch sensor LH not pressed	-
   PBD Touch Sen R	Power back door touch sensor RH signal / ON or OFF	ON: Power back door touch sensor RH pressed OFF: Power back door touch sensor RH not pressed	-

   OK

   The power back door touch sensor functions as specified in the normal condition.

NG → See step   16 

OK: Go to next step 

1. Check the Data List to determine if the power back door main switch function properly.
   BACK DOOR (POWER BACK DOOR ECU)
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   PBD Main SW	Power back door main switch / ON or OFF	ON: Power back door main switch is not pushed OFF: Power back door main switch is pushed	-

   OK

   The power back door main switch functions as specified in the normal condition.

NG → See step   9 

OK → See step   12 

1. Remove the power back door main switch, refer to REMOVAL .
   Fig 1: View Of Power Back Door Main Switch

   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
   1 - 2	Free (OFF)	10 kΩ or higher
   1 - 2	Pushed (ON)	Below 1 Ω

NG → See step   17 

OK: Go to next step 

1. Disconnect the E21 switch connector.
   Fig 2: Identifying Power Back Door Main Switch And Power Back Door ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the O15 ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   E21-1 - O15-17 (MSW)	Always	Below 1 Ω
   E21-2 - Body ground	Always	Below 1 Ω
   E21-1 (UL) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   11