Inspection Procedure

1. Check the power back door system operation.

   Result 

   RESULT TABLE
   
   

   Result	Proceed to
   Power back door warning buzzer does not operate.	A
   Hazard warning light does not come on.	B
   Power back door warning buzzer in the power back door ECU does not operate.	C

B:  Go to step  5

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

A: Go to next step 

1. Select the Active Test, use Techstream to generate a control command, and check that the power back door buzzer sounds.

   Back door (Power back door ECU) 

   DIAGNOSTIC NOTE TABLE
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   PBD Buzzer	Power back door buzzer sound	ON / OFF	-

   OK: Buzzer sounds normally. 

NG: Go to step   3 

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

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

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION TABLE
   
   

   Tester Connection	Condition	Specified Condition
   1 - 2	Always	950 to 1050 Ω

   Fig 1: Identifying Power Back Door Warning Buzzer Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE POWER BACK DOOR WARNING BUZZER  (See REMOVAL  )

OK: Go to next step 

1. Disconnect the T9 buzzer connector.
2. Disconnect the O15 ECU connector.
3. Disconnect the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION TABLE
   
   

   Tester Connection	Condition	Specified Condition
   T9-1 - O15-26 (BZR+)	Always	Below 1 Ω
   T9-2 - Body ground	Always	Below 1 Ω
   T9-1 - Body ground	Always	10 kΩ or higher

   Fig 2: Identifying Harness & Connector (Power Back Door Warning Buzzer 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  )

1. Check the wireless door lock operation.

   OK: Hazard answer-back function operates normally. 

NG: GO TO OTHER FLOW TABLE  (See NO ANSWER-BACK )

OK: Go to next step 

1. Replace the power back door drive unit (power back door ECU) (See REMOVAL  ).

1. Check that the power back door warning buzzer operates normally.

   OK: It operates normally. 

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

OK: END (REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU) DEFECTIVE)