Only Back Door CAN Not Be Opened (Unlocked)

ONLY BACK DOOR CAN NOT BE OPENED (UNLOCKED)

CIRCUIT DESCRIPTION
The signal for manual unlocking operation on driver side door and the signal for unlocking operation interlocked with the driver side door lock key cylinder are sent to the back door ECU from the body ECU using the MPX line. Also, the signal of the back door opener switch is directly sent to the back door ECU. In response to these signals, the back door ECU controls the back door lock.

Wiring Diagram:

Step 1 - 2:

Step 3 - 4:

Step 5:

Step 5 (Continued):

INSPECTION PROCEDURE