Power Back Door Warning System does not Operate [11/2018 - 10/2023]: Procedure

1. Check power back door system operation.

   Refer to OPERATION CHECK [11/2018 - 10/2023]

   Result

   Result	Proceed to
   Hazard warning light does not come on	A
   Power back door warning buzzer does not operate	B

Result: 

B 

See step  6

Result: 

A 

See step  2

1. Check wireless door lock operation.

   Refer to OPERATION CHECK [11/2018 - 02/2019] , or refer to OPERATION CHECK [02/2019 - 08/2020] , or refer to OPERATION CHECK [08/2020 - 10/2023]

   OK

   Hazard answer-back function operates normally.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO WIRELESS DOOR LOCK CONTROL SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ] 

Result: 

OK 

See step  3

1. Temporarily replace the multiplex network door ECU with a new or normally functioning one.

   Refer to REMOVAL [11/2018 - 10/2023]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Perform the initialization for the multiplex network door ECU.

   Refer to INITIALIZATION [11/2018 - 10/2023]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Check that the power back door hazard warning lights operate normally.

   Refer to OPERATION CHECK [11/2018 - 10/2023]

   OK

   The power back door hazard warning lights operate normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (MULTIPLEX NETWORK DOOR ECU WAS DEFECTIVE) 

Result: 

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [11/2018 - 02/2019]  , or refer to  REMOVAL [02/2019 - 10/2019]  , or refer to  REMOVAL [10/2019 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021]  , or refer to  REMOVAL [12/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

1. Perform the Active Test according to the display on the Techstream.

   Refer to DATA LIST / ACTIVE TEST [11/2018 - 10/2023]

   Body Electrical > Back Door > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   PBD Buzzer	Power back door warning buzzer sound	ON or OFF	-

   Body Electrical > Back Door > Active Test 

   Tester Display
   PBD Buzzer

   OK

   Power back door warning buzzer sounds.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MULTIPLEX NETWORK DOOR ECU. Refer to  REMOVAL [11/2018 - 10/2023] 

Result: 

NG 

See step  7

1. Disconnect the Q2 power back door warning buzzer connector.
2. Disconnect the R18 multiplex network door ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q2-1 (BZR+) - R18-16 (BZR+)	Always	Below 1 Ω
   Q2-2 (BZR-) - Body ground	Always	Below 1 Ω
   Q2-1 (BZR+) or R18-16 (BZR+) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  8

1. Temporarily replace the power back door warning buzzer with a new or normally functioning one.

   Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  9

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

   Refer to OPERATION CHECK [11/2018 - 10/2023]

   OK

   Power back door warning buzzer sounds.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (POWER BACK DOOR WARNING BUZZER WAS DEFECTIVE) 

Result: 

NG 

REPLACE MULTIPLEX NETWORK DOOR ECU. Refer to  REMOVAL [11/2018 - 10/2023]