BACK DOOR CLOSER SYSTEM Back Door Closer does not Operate

DESCRIPTION

When the back door closer does not operate, one of the following may be the cause: 1) improper fit of the back door, or a foreign object is stuck in the back door, 2) a malfunction in the multiplex network door ECU power source circuit, 3) a malfunction in the back door lock assembly circuit, or 4) a malfunction in the multiplex network door ECU.

WIRING DIAGRAM

B005B20E01

CAUTION / NOTICE / HINT

Note


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

  • If the replacement, removal and installation of the multiplex network door ECU or disconnection of the connectors of the multiplex network door ECU has been performed, initialize the power back door system.

    Click here

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

  • As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.*


    • *: w/ Door Control Battery

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Back Door > Trouble Codes
      Result
      Result Proceed to
      DTC is not output A
      DTC B2250 is output B
      DTC B2251 is output C

    B

    GO TO DTC B2250 Click here

    C

    GO TO DTC B2251 Click here

    A

  2. CHECK BACK DOOR LOCK FUNCTION


    1. Check if the back door can be fully closed by hand.

      Result
      Result Proceed to
      The back door can be closed normally A
      The back door cannot be closed normally B

    B

    IMPROPER FIT OF BACK DOOR, OR A FOREIGN OBJECT IS STUCK IN BACK DOOR

    A

  3. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK DOOR ECU -BATTERY AND BODY GROUND)


    1. B0059L4C10
      *a

      Rear view of wire harness connector

      (to Multiplex Network Door ECU)

      Disconnect the multiplex network door ECU connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Y26-10 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Y25-20 (ECUB) - Body ground Always 11 to 14 V
      Y26-1 (B) - Body ground Always 11 to 14 V
      Y25-18 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT BACK DOOR LOCK ASSEMBLY


    1. Remove the back door lock assembly.

      Click here

    2. Inspect the back door lock assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BACK DOOR LOCK ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - MULTIPLEX NETWORK DOOR ECU AND BODY GROUND)


    1. Disconnect the Y12 back door lock assembly connector.

    2. Disconnect the Y25 and Y26 multiplex network door ECU connectors.

    3. Disconnect the 4A instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Y12-1 (M+) - Y26-4 (DC+) Always Below 1 Ω
      Y12-4 (M-) - Y26-3 (DC-) Always Below 1 Ω
      Y12-8 (CTY) - Y25-11 (FUL) Always Below 1 Ω
      Y12-2 (FSW) - Y25-13 (PAWL) Always Below 1 Ω
      Y12-3 (CLS) - Y25-9 (HAF) Always Below 1 Ω
      Y12-6 (OPN) - Y25-7 (POS) Always Below 1 Ω
      Y12-7 (E) - Body ground Always Below 1 Ω
      Y12-1 (M+) or Y26-4 (DC+) - Body ground Always 10 kΩ or higher
      Y12-4 (M-) or Y26-3 (DC-) - Body ground Always 10 kΩ or higher
      Y12-2 (FSW) or Y25-13 (PAWL) - Body ground Always 10 kΩ or higher
      Y12-8 (CTY) or Y25-11 (FUL) - Body ground Always 10 kΩ or higher
      Y12-3 (CLS) or Y25-9 (HAF) - Body ground Always 10 kΩ or higher
      Y12-6 (OPN) or Y25-7 (POS) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MULTIPLEX NETWORK DOOR ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR