DTC B2251: Back Door Closer Switch Malfunction [12/2013 - ]: Procedure

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 / Data List.
5. Read the Data List according to the display on the Techstream.

   Body Electrical > Back Door > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Courtesy SW	Back door courtesy switch signal	ON or OFF	ON: Back door open OFF: Back door closed	-

   Body Electrical > Back Door > Data List 

   Tester Display
   Courtesy SW

   OK

   On the Techstream screen, ON or OFF is displayed accordingly.

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

REPLACE MULTIPLEX NETWORK DOOR ECU. Refer to  REMOVAL [12/2013 - ] 

Result:  2

NG 

See step  2

1. Remove the back door lock assembly.

   Refer to REMOVAL [12/2013 - ]

2. Inspect the back door lock assembly.

   Refer to INSPECTION [12/2013 - ]

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPLACE BACK DOOR LOCK ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result:  1

OK 

See step  3

1. Disconnect the X19 back door lock assembly connector.
2. Disconnect the X6 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
   X19-3 (CTY) - X6-19 (FUL)	Always	Below 1 Ω
   X19-4 (E) - Body ground	Always	Below 1 Ω
   X19-3 (CTY) or X6-19 (FUL) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

REPLACE MULTIPLEX NETWORK DOOR ECU. Refer to  REMOVAL [12/2013 - ] 

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR