POWER TRUNK LID SYSTEM, Diagnostic DTC:B2251

DTC Code DTC Name
B2251 Back Door Closer Switch Malfunction

DESCRIPTION


DTC Code DTC Detection Condition Trouble Area
B2251 When luggage door is opening or closing, malfunction occurs in half-latch switch, striker switch, or courtesy switch of luggage compartment door closer assembly

  • Luggage compartment door closer assembly

  • Wire harness

  • Luggage closer motor assembly (power trunk lid ECU)

WIRING DIAGRAM

Refer to the Luggage Compartment Door Closer does not Operate Click here.

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Check the Data List for proper functioning of the luggage compartment door closer.

      Back Door (Luggage closer motor assembly)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Half Latch SW Half-latch switch signal / ON or OFF

      ON: Half-latch switch is ON

      OFF: Half-latch switch is OFF

      		 -
      Striker Switch Striker switch signal / ON or OFF

      ON: Striker switch is ON

      OFF: Striker switch is OFF

      		 -
      Courtesy SW Courtesy switch signal / ON or OFF

      ON: Courtesy switch is ON

      OFF: Courtesy switch is OFF

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

    NG

    CHECK HARNESS AND CONNECTOR (LUGGAGE COMPARTMENT DOOR CLOSER - LUGGAGE CLOSER MOTOR AND BODY GROUND) Click here

    OK

    REPLACE LUGGAGE CLOSER MOTOR ASSEMBLY Click here

  2. CHECK HARNESS AND CONNECTOR (LUGGAGE COMPARTMENT DOOR CLOSER - LUGGAGE CLOSER MOTOR AND BODY GROUND)

    A01GI7IE06

    1. Disconnect the S43 motor connector.

    2. Disconnect the S36 closer connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      S36-3 (FSW) - S43-7 (HALF) Always Below 1 Ω
      S36- 6 (+B) - S43- 9 (BDCY) Always Below 1 Ω
      S36-7 (CTY) - S43-22 (LCTY) Always Below 1 Ω
      S36-8 (E) - Body ground Always Below 1 Ω
      S36-3 (FSW) - Body ground Always 10 kΩ or higher
      S36- 6 (+B) - 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

  3. CHECK LUGGAGE COMPARTMENT DOOR CLOSER (OPERATION)


    1. Temporarily replace the luggage compartment door closer with a new or normally functioning one Click here.


    NEXT

  4. CHECK DTC


    1. Delete the DTCs Click here.

    2. Recheck for DTCs Click here.

      Result
      Result Proceed to
      No DTC is output A
      DTC B2251 is output B

    B

    REPLACE LUGGAGE CLOSER MOTOR ASSEMBLY Click here

    A

    END (LUGGAGE COMPARTMENT DOOR CLOSER IS DEFECTIVE)