DTC B2251: Back Door Closer Switch Malfunction [12/2012 - 10/2015]: Procedure

1. Check the Data List for proper functioning of the back door courtesy switch.

   Refer to DATA LIST / ACTIVE TEST [12/2012 - 10/2015]

   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

   The display is as specified in the normal condition column.

Result: 

OK 

REPLACE MULTIPLEX NETWORK DOOR ECU:  REMOVAL [12/2012 - 10/2015] 

Result: 

NG 

See step  2

1. Remove the back door lock assembly.

   Refer to REMOVAL [12/2012 - 10/2015]

2. Inspect the back door lock assembly.

   Refer to INSPECTION [12/2012 - 10/2015]

Result: 

NG 

REPLACE BACK DOOR LOCK ASSEMBLY:  REMOVAL [12/2012 - 10/2015] 

Result: 

OK 

See step  3

1. Disconnect the U13 back door lock assembly connector.
2. Disconnect the U18 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
   U13-3 (CTY) - U18-19 (FUL)	Always	Below 1 Ω
   U13-4 (E) - Body ground	Always	Below 1 Ω
   U13-3 (CTY) or U18-19 (FUL) - Body ground	Always	10 kΩ or higher

Result: 

OK 

REPLACE MULTIPLEX NETWORK DOOR ECU:  REMOVAL [12/2012 - 10/2015] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR