POWER BACK DOOR SYSTEM, Diagnostic DTC:B2226

DTC Code DTC Name
B2226 PBD Unit Pulse Sensor LH Circuit

DESCRIPTION

This DTC is stored when the multiplex network door ECU detects an error in the power back door unit assembly set LH pulse signal.

DTC No. Detection Item DTC Detection Condition Trouble Area
B2226 PBD Unit Pulse Sensor LH Circuit The multiplex network door ECU detects an error in the power back door unit assembly set LH pulse signal.

  • Multiplex network door ECU

  • Power back door unit assembly set LH

  • Wire harness or connector

WIRING DIAGRAM

B003ZY3E03
*a Multiplex Network Door ECU
*b Power Back Door Unit Assembly Set LH

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Back Door > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > Back Door > Trouble Codes
      Result
      Result Proceed to
      DTC B2226 is not output A
      DTC B2226 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  2. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK DOOR ECU - POWER BACK DOOR UNIT ASSEMBLY SET LH)


    1. Disconnect the X6 multiplex network door ECU connector.

    2. Disconnect the X1 power back door unit assembly set LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X6-11 (DSG) - X1-4 (DSG) Always Below 1 Ω
      X6-12 (DSV) - X1-3 (DSV) Always Below 1 Ω
      X6-22 (DS2) - X1-6 (DS2) Always Below 1 Ω
      X6-23 (DS1) - X1-5 (DS1) Always Below 1 Ω
      X6-11 (DSG) or X1-4 (DSG) - Body ground Always 10 kΩ or higher
      X6-12 (DSV) or X1-3 (DSV) - Body ground Always 10 kΩ or higher
      X6-22 (DS2) or X1-6 (DS2) - Body ground Always 10 kΩ or higher
      X6-23 (DS1) or X1-5 (DS1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK MULTIPLEX NETWORK DOOR ECU


    1. B003ZFCC30
      *a

      Front view of wire harness connector

      (to Power Back Door Unit Assembly Set LH)

      Disconnect the power back door unit assembly set LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X1-4 (DSG) - 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
      X1-5 (DS1) - Body ground Always 7 V or higher
      X1-6 (DS2) - Body ground Always 7 V or higher
      X1-3 (DSV) - Body ground Always 7 V or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MULTIPLEX NETWORK DOOR ECU Click here

    OK

  4. CHECK POWER BACK DOOR UNIT ASSEMBLY SET LH


    1. Using an oscilloscope, check the waveform of each terminal from the rear of the multiplex network door ECU X6 connector.

      B003ZGTC20
      *a

      Component with harness connected

      (Multiplex Network Door ECU)

      		 *b Waveform (CH1)
      *c Waveform (CH2) - -
      Measurement Condition
      Item Condition
      Tester connection

      • CH1 : X6-23 (DS1) - Body ground

      • CH2 : X6-22 (DS2) - Body ground
      Tool setting 2 V/DIV., 2 ms./DIV.
      Vehicle condition Open and close the back door by hand.

      Tech Tips

      The period changes in accordance to the speed at which the back door is opened and closed by hand.

      OK
      The waveform displayed is as shown in the illustration.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MULTIPLEX NETWORK DOOR ECU Click here

    NG

    REPLACE POWER BACK DOOR UNIT ASSEMBLY SET LH Click here