Electronic controller can controll for industries or can controll a AC voltage.

Defective blower motor or problems in the Automatic climate control.

Wiring diagram can be downloaded here: http://www.ezdries.net/Vidpics/4Runner%20Wiring%20diagram/2003%204Runner%20Wiring%20Diagram.zip

Both the control panel contols the voltage incas of a serg and the ac rely also controls the voltage to that thw ac will work.

The short might have caused overheat and damage to the electronics.... contact hayward

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

many electronics have a voltage selecter switch, check all around for one, and make sure it is set correctly

Official Agents for Delta Electronics (VFD, PLC, Servo Motor, Servo Drives, Temperature Controllers, Communication modules and devices) in UAE, Dubai is ARPI Industrial Equipment.

Check the website.
http://arpiie.com/index.php/motorsdrives/acdrives

Check fuse 17 at the fuse panel.

start here



B3 MANUAL A/C ELECTRONIC DOOR ACTUATOR SUPPLY VOLTAGE CHECK

• Disconnect A/C electronic door actuator motor connector located on the evaporator case and accessed through the glove compartment opening.

• Using a test lamp, check for battery voltage between Circuit 247 and Circuit 246.

• Did test lamp illuminate?

Pin Number Circuit Circuit Function 1 - Not Used 2 - Not Used 3 351 (BR/W) Control Potentiometer Wiper 4 243 (LG/O) Control Potentiometer Ground 5 - Not Used 6 470 (PK/BK) Control Potentiometer B+ 7 247 (W/Y) Actuator B+ 8 246 (P) Actuator Ground

are you sure it is not the temp control on the heater control panel that's bad?
please rate if this solves your issue.

A/C Electronic Blend Door Actuator The A/C electronic blend door actuator is located on the rear of the A/C evaporator housing assembly.

• Its function is to move the A/C air temperature control door on command from the control assembly.
• The A/C electronic blend door actuator contains a reversible electric motor and a potentiometer. The potentiometer wiper is connected to the actuator output shaft and moves with the output shaft to indicate the position of the A/C air temperature control door.
• A 5 volt signal is applied to the ends of the potentiometer. The voltage available at the wiper indicates the position of the potentiometer. The expressed value of the actuator wiper voltage is sent to the control module and is matched with the wiper voltage of the module potentiometer. The printed circuit board then drives the actuator motor in whichever direction is necessary to make the actuator wiper voltage agree with the control module wiper voltage.

A/C Electronic Blend Door Actuator
Removal

1. Disengage two push pins retaining instrument panel insulator to instrument panel. Disconnect courtesy lamp from instrument panel insulator.
   
   1. Remove floor console. Refer to Section 01-12 .
      
   1. Working from under instrument panel, remove two retaining screws and metal cover from A/C evaporator housing.
      
   1. Remove A/C electronic blend door actuator electrical connector.
      
   1. Remove three remaining retaining screws from A/C electronic blend door actuator.
      
   1. Pull the A/C electronic blend door actuator away from the A/C evaporator housing for a distance of approximately 25 mm (1 inch) to disengage it from the A/C air temperature control door.
      

Is the heater working? Turn the A.C. off with the car at an idle. Turn the A.C. on and listen for the compressor to turn on. (should hear a click under the hood and the motor should change pitch. If no noise, the compressor is not comming on. The o-rings were bad about leaking on these cars, letting out all the freeon. If there is no freeon, the low pressure switch won't let the compressor run.

the door opening & closing on Max a/c is the inside/outside air intake door.
The temp blend door is the one you are concernd about. It says you have to remove instrument panel for access. ouch!!!

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A/C Electronic Door Actuator Motor
The A/C electronic door actuator motor (19E616) is located on top of the A/C evaporator core housing assembly.

• Its function is to move the A/C air temperature control door on command from the control assembly.
• The A/C electronic door actuator motor contains a reversible electric motor and a potentiometer. The potentiometer wiper is connected to the actuator output shaft and moves with the output shaft to indicate the position of the A/C air temperature control door.
• Battery voltage is applied to the ends of the potentiometer. The voltage available at the wiper indicates the position of the potentiometer. The actuator wiper voltage is sent to the control module and matched with the wiper voltage of the module potentiometer. The printed circuit board then drives the actuator motor in the direction necessary to make the actuator wiper voltage agree with the control module wiper voltage.