Toyota Tundra Service Manual: Driver Side Power Window Auto Down Function does not Operate

DESCRIPTION

If the AUTO DOWN function does not operate, the cause may be one or more of the following:

The master switch has a malfunction.
The driver side motor has a malfunction.
The wiring between the master switch and the driver side motor is open or shorted.

WIRING DIAGRAM

PROCEDURE

1.	CHECK MANUAL UP / DOWN FUNCTION

(a) Check that the manual UP/DOWN function of the master switch can operate the driver door power window.

OK:

Manual UP/DOWN function operates normally.

REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY

Toyota Tundra Service Manual > Vehicle Stability Control System: Open in Stop Light Switch Circuit (C1425)
DESCRIPTION The skid control ECU (brake actuator assembly) receives stop light switch assembly signals and uses them to determine whether or not the brakes are applied. The skid control ECU (brake actuator assembly) has a detection circuit that it uses to detect an open in the stop light input line. ...

Toyota Tundra Owners Manual