LUGGAGE COMPARTMENT DOOR CLOSER SYSTEM, Diagnostic DTC:B2251

DTC Code DTC Name
B2251 Back Door Closer Switch Malfunction

DESCRIPTION

"Back door" refers to the luggage compartment door.

DTC B2251 is output when there is a malfunction in the half-latch switch circuit of the luggage door closer assembly.

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

  • Luggage door closer assembly

  • Harness or connector

  • Luggage closer motor assembly

WIRING DIAGRAM

Refer to the "System Diagram" Click here.

INSPECTION PROCEDURE

Note


  • If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      DTC B2251 is not output.

    NG

    READ VALUE USING GTS Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  3. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Back Door / Data List.

    5. Read the Data List according to the display on the GTS.

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

      ON: Half-latch switch of luggage door closer assembly on (Luggage compartment door open)

      OFF: Half-latch switch of luggage door closer assembly off (Luggage compartment door closed)

      • See "Luggage Door Closer Operation Timing Chart" Click here.

      • When this item is abnormal, there is a problem with the half-latch switch of the luggage door closer assembly or related parts.
      OK
      On GTS screen, each item changes between ON and OFF as shown in the above chart.

    NG

    CHECK HARNESS AND CONNECTOR (LUGGAGE CLOSER MOTOR ASSEMBLY - LUGGAGE DOOR CLOSER ASSEMBLY) Click here

    OK

    REPLACE LUGGAGE CLOSER MOTOR ASSEMBLY Click here

  4. CHECK HARNESS AND CONNECTOR (LUGGAGE CLOSER MOTOR ASSEMBLY - LUGGAGE DOOR CLOSER ASSEMBLY)


    1. Disconnect the U16 luggage closer motor assembly connector.

    2. Disconnect the U14 luggage door closer assembly connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      U16-7 (HAF) - U14-6 (FSW) Always Below 1 Ω
      U16-7 (HAF) or U14-6 (FSW) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE LUGGAGE DOOR CLOSER ASSEMBLY


    1. Temporarily replace the luggage door closer assembly with a new or known good one Click here.


    NEXT

  6. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  7. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      DTC B2251 is not output.

    NG

    REPLACE LUGGAGE CLOSER MOTOR ASSEMBLY Click here

    OK

    END (LUGGAGE DOOR CLOSER ASSEMBLY IS DEFECTIVE)