General Information

When the mode switches are pressed, a signal is sent from the HVAC control module to the mode actuator through the mode door control circuit. When the logic inside the actuator receives the signal, the mode actuator moves into the desired position.

The rear fuse block provides power to the mode actuator through the ignition 3 voltage circuit. Ground is provided by the low reference circuit, the HVAC control module and ground circuits.

The HVAC control module receives power from the rear fuse block on the ignition 3 voltage circuit and battery positive voltage circuit. The ground circuits proves ground for the module.

The mode actuator is a DC motor. 0 volts drives the actuator in one direction while 12 volts moves the actuator in the opposite direction. A 12 volt signal is sent out over the mode door control circuit, from the HVAC control module, to the mode actuator. When a mode setting is selected, the logic inside the actuator is used to determine the mode door position signals value. The motor moves the mode door to the desired position. When servicing the actuators, make sure you use the correct service part number. There are specific parts for the left and right side of the HVAC module. Using the wrong part will effect mode operation.