POWER TRUNK LID SYSTEM, Diagnostic DTC:B2251

DTC Code DTC Name
B2251 Back Door Closer Switch Malfunction

DESCRIPTION

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

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

  • Luggage compartment door lock assembly

  • Harness or connector

  • Luggage closer motor assembly

WIRING DIAGRAM

Refer to the "System Diagram" Click here.

INSPECTION PROCEDURE

Note


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

  • When using the GTS with the engine switch off to troubleshoot:

    Connect the GTS to the DLC3 and turn a courtesy light switch on and off at 1.5-seconds intervals until communication between the GTS and vehicle begins.

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 (HALF-LATCH SWITCH) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  3. READ VALUE USING GTS (HALF-LATCH SWITCH)


    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 Luggage compartment door lock assembly half-latch switch signal / ON or OFF

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

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

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

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

    NG

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

    OK

    REPLACE LUGGAGE CLOSER MOTOR ASSEMBLY Click here

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


    1. Disconnect the U33 luggage closer motor assembly connector.

    2. Disconnect the a9 luggage compartment door lock assembly connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      U33-7 (HAF) - a9-6 (FSW) Always Below 1 Ω
      U33-7 (HAF) or a9-6 (FSW) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE LUGGAGE COMPARTMENT DOOR LOCK ASSEMBLY


    1. Temporarily replace the luggage compartment door lock assembly with a new one Click here.


    NEXT

  6. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  7. CHECK FOR DTC


    1. Delete the DTCs Click here.

      OK
      DTC B2251 is not output.

    NG

    REPLACE LUGGAGE CLOSER MOTOR ASSEMBLY Click here

    OK

    END (LUGGAGE COMPARTMENT DOOR LOCK ASSEMBLY IS DEFECTIVE)