Main power window and door lock/unlock switch, power window and door lock/unlock switch RH and BCM transmit and receive the signal by power window serial link.
The signal mentioned below is transmitted from BCM to main power window and door lock/unlock switch and power window and door lock/unlock switch RH
Keyless power window down signal The signal mentioned below is transmitted from main power window and door lock/unlock switch to power window and door lock/unlock switch RH
Front door window RH operation signal
Power window control by key cylinder switch signal
Remove Intelligent Key, and close front door LH and RH.
Check signal between BCM connector and ground with oscilloscope when door lock and unlock switch (LH and RH) is turned to "LOCK" or "UNLOCK".
Check that signals which are shown in the figure below can be detected during 10 second just after door lock and unlock switch (LH and RH) is turned to "LOCK" or "UNLOCK".
Is the Inspection result normal?
YES >> Power window serial link is OK.
NO >> GO TO 2
CHECK POWER WINDOW SERIAL LINK CIRCUIT
Turn ignition switch OFF.
Disconnect BCM and main power window and door lock/unlock switch.
Check continuity between BCM connector (A) and main power window and door lock/unlock switch connector (B).
Check continuity between BCM connector (A) and ground.