DTC B2251: Back Door Closer Switch Malfunction: Procedure

1. Check the Data List for proper functioning of the luggage compartment door closer.
   BODY NO. 4 (REAR JUNCTION BLOCK ECU)
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Luggage Pawl Switch	Luggage compartment door closer pawl switch signal / ON or OFF	ON: Luggage compartment door closer pawl switch is ON OFF: Luggage compartment door closer pawl switch is OFF	-
   Luggage Courtesy Switch	Luggage compartment door closer courtesy switch signal / ON or OFF	ON: Luggage compartment door closer courtesy switch is ON OFF: Luggage compartment door closer courtesy switch is OFF	-

   OK

   On the screen, each item changes between ON and OFF as shown in above chart.

NG → See step   2 

OK → REPLACE LUGGAGE ROOM JUNCTION BLOCK ASSEMBLY (REAR JUNCTION BLOCK ECU) 

Fig 1: Identifying S36 Closer And S63 ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the S36 closer connector.
2. Disconnect the S63 ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   S36- 5 (CLS) - S63- 2 (LCLS)	Always	Below 1 Ω
   S36-7 (CTY) - S63-9 (LCTY)	Always	Below 1 Ω
   S36-8 (E) - Body ground	Always	Below 1 Ω
   S36- 5 (CLS) - Body ground	Always	10 kΩ or higher
   S36-7 (CTY) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the luggage compartment door closer with a new or normally functioning one. Refer to REMOVAL .

NEXT: Go to next step 

1. Delete the DTCs. Refer to DTC CHECK / CLEAR .
2. Recheck for DTCs. Refer to DTC CHECK / CLEAR .
   RESULT
   
   

   Result	Proceed to
   DTC B2250 is output	A
   No DTC is output	B

B → END (LUGGAGE COMPARTMENT DOOR CLOSER IS DEFECTIVE) 

A → REPLACE LUGGAGE ROOM JUNCTION BLOCK ASSEMBLY (REAR JUNCTION BLOCK ECU)