POWER BACK DOOR SYSTEM Back Door Lock Motor Circuit

DESCRIPTION

The back door lock motor is built into the back door lock assembly. The power back door unit assembly (power back door ECU) controls the back door lock motor to open/close the back door. This power back door unit assembly (power back door ECU) applies current to terminals 2 and 1 to operate the motor to close the door. It reverses the direction of the current to operate the motor to open the door.

WIRING DIAGRAM

B0019OQE07
*a Back Door Lock
*b Back Door Lock Assembly
*c Power Back Door Unit Assembly (Power Back Door ECU)

PROCEDURE


  1. INSPECT BACK DOOR LOCK ASSEMBLY (CLOSER MOTOR OPERATION)


    1. Remove the back door lock assembly Click here.

    2. Inspect the back door lock assembly Click here.


    NG

    REPLACE BACK DOOR LOCK ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - POWER BACK DOOR UNIT ASSEMBLY [POWER BACK DOOR ECU])


    1. Disconnect the S29 back door lock assembly connector.

    2. Disconnect the L36 power back door unit assembly (power back door ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      S29-2 (M+) - L36-2 (DC+) Always Below 1 Ω
      S29-1 (M-) - L36-1 (DC-) Always Below 1 Ω
      S29-2 (M+) - Body ground Always 10 kΩ or higher
      S29-1 (M-) - Body ground Always 10 kΩ or higher

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR