Dtc B2251 Back Door Closer Switch Malfunction

Vehicle Exterior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Door Hatch. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING GTS (BACK DOOR LOCK)

INSPECT BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY SWITCH)

CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - POWER BACK DOOR UNIT ASSEMBLY [POWER BACK DOOR ECU] AND BODY GROUND)

DTC B2251 Back Door Closer Switch Malfunction


DESCRIPTION

The power back door unit assembly (power back door ECU) inputs signals from the latch switch, closer position switch, pawl switch and back door courtesy switch, which are built into the back door lock assembly. Based on these switch signals, the latch position of the back door lock assembly is determined.

DTC Code
DTC Detection Condition
Trouble Area
B2251
While back door closer is operating, malfunction is detected in position information from each switch within specified amount of time
  1. Back door lock assembly
  2. Harness or connector
  3. Power back door unit assembly (power back door ECU)

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Door Hatch.Tail Gate Closer System. Dtc B2251 Back Door Closer Switch Malfunction


INSPECTION PROCEDURE

1.READ VALUE USING GTS (BACK DOOR LOCK)

  1. Check the Data List for proper functioning of each switch (Click here).

    Back Door
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Courtesy SW
    		Back door courtesy switch signal / ON or OFF
    		ON: Back door courtesy switch is on
    OFF: Back door courtesy switch is off
    		-
    OK:
    The display is as specified in the normal condition.


NG
Go to step 2
OK

REPLACE POWER BACK DOOR UNIT ASSEMBLY (POWER BACK DOOR ECU) (Click here)

2.INSPECT BACK DOOR LOCK ASSEMBLY (BACK DOOR COURTESY SWITCH)

  1. Remove the back door lock assembly (Click here).

  1. Inspect the back door lock assembly (Click here).



NG
REPLACE BACK DOOR LOCK ASSEMBLY (Click here)
OK


3.CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - POWER BACK DOOR UNIT ASSEMBLY [POWER BACK DOOR ECU] AND BODY GROUND)

  1. Disconnect the S33 back door lock assembly connector.

  1. Disconnect the L52 power back door unit assembly (power back door ECU) connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    S33-4 (CTY) - L52-20 (FUL)
    		Always
    		Below 1 Ω
    S33-1 (E) - Body ground
    		Always
    		Below 1 Ω
    S33-4 (CTY) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER BACK DOOR UNIT ASSEMBLY (POWER BACK DOOR ECU) (Click here)