Toyota Tacoma (2015-2018) Service Manual: System Description

Toyota Tacoma (2015-2018) Service Manual / Window / Glass / Power Window Control System(w/ Jam Protection Function) / System Description

SYSTEM DESCRIPTION

1. POWER WINDOW CONTROL SYSTEM DESCRIPTION

(a) The power window control system controls the power window operation using the power window regulator motors. The main controls of this system are the power window regulator master switch assembly (mounted on the driver door), power window regulator switch assembly (mounted on the front passenger door) and rear power window regulator switch assemblies (mounted on the rear doors). Operating a window switch results in electrical power being transmitted to the corresponding power window regulator motor.

(b) The power window control system (for back door power window) controls the power window open/close function using the power window regulator motor.

The main control of this system is the back door power window regulator switch assembly.*1

*1: w/ Back Door Power Window

2. FUNCTION OF MAIN COMPONENTS

The power window control system consists of the following components:

Component	Outline
Power Window Regulator Master Switch Assembly	Controls power window operation for all seats. When lock switch is set to lock position, window operation will be possible for all windows.
Power Window Regulator Switch Assembly	Located on front passenger side door. Controls front passenger window operation.
Rear Power Window Regulator Switch Assembly*1 LH Side RH Side	Located on the rear doors. Each switch controls window operation for its respective window.
Front Power Window Regulator Motor Assembly	Receives switch signals and changes signals into motor activation. As a result, window position changes. Uses Hall-IC in regulator motor with ECU to detect window position and jamming.
Rear Power Window Regulator Motor Assembly*1	Receives switch signals and changes signals into motor activation. As a result, window position changes.
Rear No. 2 Power Window Regulator Switch Assembly*2	Controls power window operation for back window glass.
Power Window Regulator Motor Assembly*2	Receives back door power window regulator switch signals and activates motor to change window position.

*1: for Double Cab
*2: w/ Back Door Power Window

3. SYSTEM FUNCTION

The power window control system has the following functions:

Function	Outline
Manual up-and-down function	Function that causes the window to go up while the power window switch is being pulled halfway up and to go down while pushed halfway down. The window stops as soon as the switch is released.
Auto up and down function (for Front Door Only)	Function that enables the driver door or front passenger door window to be fully opened or closed by one full pull or push of the power window regulator master switch assembly or front power window regulator switch assembly.
Window lock function	Function that disables power window regulator switch assembly operations when the window lock switch is pressed. The power window regulator switch assemblies can be operated when the window lock switch is pressed again. Power window regulator master switch can operate all windows even when locked.
Jam protection function	Function that automatically stops power window and moves it downward if a foreign object gets jammed in door window during auto up and manual up operation.
Catch protection function	Function that automatically stops the power window if a foreign object gets caught in the door window during auto down or manual down operation.
Remote control function	Function that allows the power window regulator master switch assembly to control manual and auto up-and-down operations of the front passenger door window and rear door windows.
Key-off operation function	Function that makes it possible to operate all power windows for approximately 43 seconds after the ignition switch is turned off when the driver side door or front passenger side door has not been opened. When approximately 43 seconds have elapsed, or the driver door or front passenger door is opened after the ignition switch is turned off, the key-off operation function will be disabled. HINT: Even if the driver door or passenger door is opened during automatic window operation while the key-off operation function is on, the window will continue operating.
Diagnosis	Function that allows diagnosis of the power window control system if any of the power window ECUs (built into each power window regulator motor assembly) detect a malfunction in the system.
Fail-safe	Function to disable part of the power window control system functions if the pulse sensor in the power window regulator motor has a malfunction. Auto up and down function and remote control function are disabled.

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the power window control system. *: Use the Techstream. PROCEDURE 1. VEHICLE ...

System Diagram

SYSTEM DIAGRAM Communication Table Transmitting ECU Receiving ECU Signal Communication Method Power Window Regulator Master Switch ...

Other materials:

Inspection
INSPECTION PROCEDURE 1. INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY (a) Check the LO operation. Text in Illustration *a Component without harness connected (Windshield Wiper Motor Assembly) (1) Apply battery voltage to the windshield wiper motor connector and ch ...

Installation
INSTALLATION PROCEDURE 1. INSTALL FLYWHEEL HOUSING SIDE COVER (a) Install the flywheel housing side cover to the cylinder block sub-assembly. 2. INSTALL STARTER ASSEMBLY (a) Install the starter assembly with the 2 bolts. Torque: 37 N·m {377 kgf·cm, 27 ft·lbf} (b) Connect the engine wire ...

Speed Signal Circuit
DESCRIPTION The combination meter assembly receives the vehicle speed signal from this circuit. The wheel speed sensors produce an output that varies according to the vehicle speed. The wheel speed sensor output is received by the skid control ECU, which uses this information to create the ve ...