Inspection Procedure

1. Check that the power back door drive unit (power back door ECU) can be initialized (See INITIALIZATION  ).

1. Check the power back door system operation.

   OK: Power back door system operates normally. 

NG: Go to step   3 

OK: END 

1. Check the back door closer system operation. (See OPERATION CHECK  )

NG: BACK DOOR CLOSER SYSTEM  (See SYSTEM DESCRIPTION  )

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: METER/GAUGE SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

OK: Go to next step 

1. Check for the DTCs (See DTC CHECK/CLEAR  ).

   Result 

   RESULT TABLE
   
   

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

B: GO TO DTC TABLE (B2250)  (See DTC B2250: BACK DOOR CLOSER OPERATION MALFUNCTION  )

C: GO TO DTC TABLE (B2251)  (See DTC B2251: BACK DOOR CLOSER SWITCH MALFUNCTION  )

A: Go to next step 

1. Check the Data List to determine if the back door lock function properly.

   Main body ECU (Instrument panel junction block) 

   DIAGNOSTIC NOTE TABLE
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Back Dor Open	Back door lock / Permit or prohibit	Permit. Back door is unlocked Prohibit 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) 

   DIAGNOSTIC NOTE TABLE
   
   

   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: GO TO OTHER FLOW TABLE  (See TOUCH SENSOR CIRCUIT  )

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) 

   DIAGNOSTIC NOTE TABLE
   
   

   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: Go to step   9 

OK: REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU)  (See REMOVAL  )

1. Remove the power back door main switch (See REMOVAL  ).
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION TABLE
   
   

   Tester Connection	Switch Position	Specified Condition
   1 - 2	Free (OFF)	10 kΩ or higher
   1 - 2	Pushed (ON)	Below 1 Ω

   Fig 1: Identifying Power Back Door Main Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE POWER BACK DOOR MAIN SWITCH  (See REMOVAL  )

OK: Go to next step 

1. Disconnect the E21 switch connector.
2. Disconnect the O15 ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION TABLE
   
   

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

   Fig 2: Identifying Harness & Connector (Power Back Door Main Switch - Power Back Door ECU)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU)  (See REMOVAL  )