Grand Cherokee 2WD L6-4.0L VIN S (1997)
Air Door Actuator / Motor: Description and Operation
Blend Door Actuator
Automatic Temperature Control (ATC)
CIRCUIT OPERATION
Circuit C40 from the Automatic Temperature Control (ATC) module supplies 5 Volts to the position switch in the blend door motor. The ATC
module receives the sensor signal from the blend door motor on circuit C36.
Circuit D41 provides ground for the mode door position sensor. Circuit D41 connects to the ATC module.
The ATC module operates the mode door motor on circuits C35 and C34.
Manual A/C-Heater
CIRCUIT OPERATION
The A/C-Heater control head contains a blend door position sensor. The sensor is a variable resistor that provides the blend door position input to
the blend door motor actuator on circuit C36.
Circuit F71 from fuse 12 in the junction block powers the actuator when the ignition switch is in the RUN position. Circuit C34 splices to connect
the blend door actuator to ground circuit Z1.
