Heating, Ventilation and Air Conditioning Control Module Scan Tool Information

Heating Ventilation and Air Conditioning Control Module Scan Tool Data Parameters

Parameter	System State	Expected Value	Description
Operating Conditions: Ignition ON
A/C Compressor Clutch Inhibit Reason	-	Varies	The scan tool displays the reason why the activation of the A/C compressor is inhibit.
A/C Compressor Clutch Status	A/C Off	Disengaged	The scan tool displays Engaged or Disengaged depending on the state of the A/C compressor clutch.
	A/C On	Engaged
A/C Compressor Refrigerant Solenoid Valve Command	-	Varies	The scan tool displays %. The value increases stepwise from 0% to 100% depending the commanded performance of the A/C compressor.
A/C Evaporator Temperature Sensor	-	-40 to +80°C (-40 to +176°F)	The scan tool displays °C (°F). This is the current temperature at the A/C evaporator temperature sensor.
A/C High Side Pressure Sensor	-	Varies	The scan tool displays kPa. This is the current pressure of the A/C refrigerant.
A/C Indicator	A/C Off	Off	The scan tool displays On or Off depending on the state of the A/C mode.
	A/C On	On
A/C Request Signal	A/C Off	No	The scan tool displays Yes or No depending on the state of the A/C mode.
	A/C On	Yes
A/C Switch	A/C Switch released	Inactive	The scan tool displays Active or Inactive depending on the state of the A/C switch.
	A/C Switch pressed	Active
Air Inlet Door Motor Command	-	Varies	The scan tool displays Counts. This is the desired position of the air inlet door actuator.
Air Inlet Door Motor Direction	-	Varies	The scan tool displays Stop, Increase or Decrease. During the movement of the door, the scan tool shows Increase or Decrease depending the movement direction. When the position of the door is reached, the scan tool displays Stop.
Air Inlet Door Position	-	Varies	The scan tool displays Counts. This is the current position of the air inlet door actuator.
Air Recirculation Door Motor Command	-	Varies	The scan tool displays Counts. This is the desired position of the air recirculation door actuator.
Air Recirculation Door Motor Direction	-	Varies	The scan tool displays Stop, Increase or Decrease. During the movement of the door, the scan tool shows Increase or Decrease depending the movement direction. When the position of the door is reached, the scan tool displays Stop.
Air Recirculation Door Position	-	Varies	The scan tool displays Counts. This is the current position of the air recirculation door actuator.
Air Recirculation LED	Air recirculation mode is deactivated	Off	The scan tool displays On or Off depending on the state of the Recirculation mode.
	Air recirculation mode is activated	On
Air Recirculation Mode Switch	Air recirculation switch released	Inactive	The scan tool displays Active or Inactive depending on the state of the air recirculation mode switch.
	Air recirculation switch pressed	Active
Ambient Air Temperature (Filtered)	-	-40 to +80°C (-40 to +176°F)	The scan tool displays °C (°F). This is the current temperature at the ambient air temperature sensor.
Auto HVAC Button	Auto HVAC button released	Inactive	The scan tool displays Active or Inactive depending on the state of the Auto HVAC button.
	Auto HVAC button pressed	Active
Auto HVAC Indicator	Auto mode is deactivated	Off	The scan tool displays On or Off depending on the state of the Auto mode.
	Auto mode is activated	On
Auxiliary Heater Output Status	-	OK	The scan tool displays OK or Malfunction. Malfunction is displayed if there is an auxiliary heater malfunction.
Auxiliary Heater Request	-	Varies	The scan tool displays %. The value increases stepwise from 0% to 100% depending the requested performance of the auxiliary heater.
Battery Voltage	-	11-14 V	The scan tool displays V. This is the current battery voltage.
Blower Motor Speed 1-6 Indicator	-	Varies	The scan tool displays On or Off depending on the state of the blower motor speed indicators.
Blower Motor Speed	-	0-100%	The scan tool displays % depending on the state of the current blower motor speed. The value increases stepwise from 0-100% depending the selected speed.
Blower Motor Speed Command	-	0-100%	The scan tool displays % depending on the state of the selected blower motor speed. The value increases stepwise from 0-100% depending the selected speed.
Blower Motor Switch	-	Varies	Only with C67 or C68 The scan tool displays OFF, 1-8 depending on the state of the selected blower motor speed. Only with CJ2 The scan tool displays Up, Down or Inactive depending on the state of the blower motor switches.
Desired Left Duct Temperature	-	Varies	The scan tool displays °C (°F). This is the desired temperature at the left duct temperature sensor.
Desired Left Temperature Motor Door Position	-	Varies	The scan tool displays Counts. This is the desired position of the left temperature actuator.
Desired Right Duct Temperature	-	Varies	The scan tool displays °C (°F). This is the desired temperature at the right duct temperature sensor.
Desired Right Temperature Motor Door Position	-	Varies	The scan tool displays Counts. This is the desired position of the right temperature actuator.
Engine Coolant Temperature	-	-40 to +215°C (-40 to +419°F)	The scan tool displays °C (°F). This is the current engine coolant temperature.
Enhanced Defrost Indicator	Enhanced defrost mode is deactivated	Off	The scan tool displays On or Off depending on the state of the enhanced defrost mode.
	Enhanced defrost mode is activated	On
Enhanced Defrost Switch	Enhanced defrost switch released	Inactive	The scan tool displays Active or Inactive depending on the state of the enhanced defrost switch.
	Enhanced defrost switch pressed	Active
Floor Mode Indicator	Floor mode is deactivated	Off	The scan tool displays On or Off depending on the state of the floor mode.
	Floor mode is activated	On
Floor Mode Switch	Floor mode switch released	Inactive	The scan tool displays Active or Inactive depending on the state of the floor mode switch.
	Floor mode switch pressed	Active
Front Defrost Indicator	Front defrost mode is deactivated	Off	The scan tool displays On or Off depending on the state of the front defrost mode.
	Front defrost mode is activated	On
Front Defrost Switch	Front defrost switch released	Inactive	The scan tool displays Active or Inactive depending on the state of the front defrost switch.
	Front defrost switch pressed	Active
HVAC Actuators Supply Voltage	-	Varies	The scan tool displays Active or Inactive. Active is displayed if the actuators supply voltage is switched on.
Ignition Voltage	-	11-14V	The scan tool displays V. This is the current ignition voltage.
Instrument Panel Vents Indicator	Instrument panel vents mode is deactivated	Off	The scan tool displays On or Off depending on the state of the instrument panel vents mode.
	Instrument panel vents mode is activated	On
Instrument Panel Vents Switch	Instrument panel vents switch released	Inactive	The scan tool displays Active or Inactive depending on the state of the instrument panel vents switch.
	Instrument panel vents switch pressed	Active
Left Temperature Door Motor Direction	-	Varies	The scan tool displays Stop, Increase or Decrease. During the movement of the door, the scan tool shows Increase or Decrease depending the movement direction. When the position of the door is reached, the scan tool displays Stop.
Left Temperature Door Position	-	Varies	The scan tool displays Counts. This is the current position of the left temperature actuator.
Left Temperature Knob Position	-	Varies	The scan tool displays °C (°F). This value corresponds to the selected temperature.
Lower Left Duct Air Temperature Sensor	-	-40 to +80°C (-40 to +176°F)	The scan tool displays °C (°F). This is the current temperature at the lower left duct temperature sensor.
Lower Right Duct Air Temperature Sensor	-	-40 to +80°C (-40 to +176°F)	The scan tool displays °C (°F). This is the current temperature at the lower right duct temperature sensor.
Mode Door Motor Command	-	Varies	The scan tool displays Counts. This is the desired position of the mode door actuator.
Mode Door Motor Direction	-	Varies	The scan tool displays Stop, Increase or Decrease. During the movement of the door, the scan tool shows Increase or Decrease depending the movement direction. When the position of the door is reached, the scan tool displays Stop.
Mode Door Position	-	Varies	The scan tool displays Counts. This is the current position of the mode door actuator.
Passenger Compartment Air Temperature (Filtered)	-	-40 to +80°C (-40 to +176°F)	The scan tool displays °C (°F). This is the current temperature at the passenger compartment air temperature sensor.
Passenger Compartment Air Temperature (Unfiltered)	-	-40 to +80°C (-40 to +176°F)	The scan tool displays °C (°F). This is the current temperature at the passenger compartment air temperature sensor.
Passenger Compartment Humidity	-	3-100%	The scan tool displays %. This is the current relative humidity level at the windshield temperature and inside moisture sensor.
Passenger Compartment Humidity Sensor Temperature	-	-40 to +80°C (-40 to +176°F)	The scan tool displays °C (°F). This is the current temperature at the humidity sensing element temperature sensor.
Rear Defog Indicator	Rear defogger is deactivated	Off	The scan tool displays On or Off depending on the state of the rear defogger.
	Rear defogger is activated	On
Rear Defogger Status	Rear defogger is deactivated	Off	The scan tool displays On or Off depending on the state of the rear defogger.
	Engine running/Rear defogger is activated	On
Rear Defogger Switch	Rear defogger switch released	Inactive	The scan tool displays Active or Inactive depending on the state of the rear defogger switch.
	Rear defogger switch pressed	Active
Right Temperature Door Motor Direction	-	Varies	The scan tool displays Stop, Increase or Decrease. During the movement of the door, the scan tool shows Increase or Decrease depending the movement direction. When the position of the door is reached, the scan tool displays Stop.
Right Temperature Door Motor Position	-	Varies	The scan tool displays Counts. This is the current position of the right temperature door actuator.
Right Temperature Knob Position	-	Varies	The scan tool displays °C (°F). This value corresponds to the selected temperature.
Sun Azimuth	-	-180 to +180°	The scan tool displays °. This is the current angle in the horizontal plane between the sun and the vehicle driving direction.
Sun Elevation	-	0-90°	The scan tool displays °. This is the current angle in the vertical sun height.
Sunload	-	0-1 200 W/m2	The scan tool displays W/m2. This is the current sun heat intensity.
Upper Left Duct Air Temperature Sensor	-	-40 to +80°C (-40 to +176°F)	The scan tool displays °C (°F). This is the current temperature at the upper left duct temperature sensor.
Upper Right Duct Air Temperature Sensor	-	-40 to +80°C (-40 to +176°F)	The scan tool displays °C (°F). This is the current temperature at the upper right duct temperature sensor.
Windshield Temperature	-	-40 to +80°C (-40 to +176°F)	The scan tool displays °C (°F). This is the current temperature at the windshield temperature sensor.

Heating Ventilation and Air Conditioning Control Module Scan Tool Output Controls

Output Control	Description
Air Inlet Door Position	The HVAC control module commands the air inlet door actuator from venting to recirculation and back again.
Air Recirculation Door Position	The HVAC control module commands the air recirculation door actuator from venting to recirculation and back again.
Auxiliary Heater Request	When On is selected, the HVAC control module sends a request signal to the auxiliary heater.
Blower Motor Speed Command	The HVAC control module commands the blower motor stepwise from 0% to 100% and back again.
HVAC Actuators Learn	The HVAC control module executes the Motor Learn Routine when commanded from the scan tool.
Illuminate all Indicators	The HVAC control module illuminates all indicators when commanded from the scan tool.
Left Temperature Door Position	This commands the left temperature door position from Cold to Hot and back again.
Mode Door Position	The HVAC control module commands the mode actuator stepwise from defrost to floor and back again.
Rear Window Defogger	The HVAC control module commands the rear defogger On and Off.
Right Temperature Door Position	This commands the right temperature door position from Cold to Hot and back again.