Driver Power Window Does Not Operate

DRIVER POWER WINDOW DOES NOT OPERATE

CIRCUIT DESCRIPTION
The power window regulator master switch assembly (door ECU) controls the driver side power window by itself and drives the driver side power window motor.

NOTE: The power window system has a function with a large-scale multiplex communication. First of all, inspect the communication function depending on "how to proceed with troubleshooting" and confirm that the communication system has no abnormality. Then finally perform the troubleshooting.

Wiring Diagram:

Step 1 - 3:

Step 4:

Step 5:

INSPECTION PROCEDURE