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 compartment door is opening or closing, malfunction occurs in half-latch switch, striker switch, or courtesy switch of luggage compartment door closer

  • Luggage compartment door closer

  • Harness or connector

  • Luggage closer motor (power trunk lid ECU)

WIRING DIAGRAM

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

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (LUGGAGE COMPARTMENT DOOR CLOSER)


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

      Back Door:
      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) Click here

    OK

    REPLACE LUGGAGE CLOSER MOTOR ASSEMBLY Click here

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

    A01GZ8IE06

    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
      S43-7 (HALF) - S36-3 (FSW) Always Below 1 Ω
      S43- 9 (BDCY) - S36- 6 (+B) Always Below 1 Ω
      S43-22 (LCTY) - S36-7 (CTY) 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. REPLACE LUGGAGE COMPARTMENT DOOR CLOSER ASSEMBLY


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


    NEXT

  4. CLEAR DTC


    1. Clear the DTC Click here.


    NEXT

  5. CHECK FOR DTC


    1. Recheck for DTCs Click here.

      OK
      DTC B2251 is not output.

    NG

    REPLACE LUGGAGE CLOSER MOTOR ASSEMBLY Click here

    OK

    END (LUGGAGE COMPARTMENT DOOR CLOSER IS DEFECTIVE)