Dual Zone Control Switch

The right air temperature switches are provided to allow the passenger to offset air discharge temperatures on the right side of the vehicle. Passenger temperatures can be set 3°C (6°F) cooler or warmer than the primary setting. To activate the dual zone, the passenger presses either of the right air temperature switches to the desired offset. Temperature offset will be allowed as long as the set temperature is not in the maximum hot or cold settings. The VF display will not show the passenger temperature selection. A LCD display with a 3-color readout will indicate the amount of offset. The colors indicate the following:
^ The amber light indicates no temperature offset.
^ The red lights indicate warmer than driver set temperature.
^ The blue lights indicate cooler than driver set temperature.

The I/P fuse block provides power to the right air temperature actuator through the ignition 3 voltage circuit. Ground is provided by the HVAC control module and ground circuit.

The right air temperature actuator is an electronic stepper motors with feedback potentiometers. The right air temperature door position signal circuit sends a voltage signal to the actuator requesting a desired temperature. Zero volts drives the actuator in one direction while 5 volts moves the actuator in the opposite direction. When the actuator receives 2.5 volts, actuator rotation stops. A 5-volt reference signal is sent out over the 5-volt reference circuit, from the HVAC control module, to the right air temperature actuator. When a desired temperature setting is selected, whether manual or automatic, the solid state circuit is used to determine the right air temperature door position sensor signals value. A separate 5-volt reference is sent from the HVAC control module to the solid state circuit. The HVAC control module software uses this reference voltage to determine the right air temperature actuator position through the right air temperature door position circuit. The motor opens the air mixture door to a position to divert sufficient air past the heater core to achieve the desired vehicle temperature.