Heating, Ventilation and Air Conditioning Control Module Scan Tool Information
WARNING: This page is about a different car, the 2015 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
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 | - | 0-100% | The value moves between 0-100% depending on the valves commanded location. |
| 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 Request Signal | A/C Off | Inactive | The scan tool displays Active or Inactive depending on the state of the A/C mode. |
| A/C On | Active | ||
| Air Inlet Door Actuator Command | - | Varies | The scan tool displays a number in counts to represent the position that has been commanded. |
| Air Inlet Door Actuator Direction | - | Varies | The scan tool displays Increase, Decrease, or Stop depending on which direction the door has been commanded. |
| Air Inlet Door Actuator Learn Status | - | Varies | The scan tool displays Not Running, In Progress, Complete or Failed depending the calibration status. |
| Air Inlet Door Position | - | Varies | The scan tool displays Counts. This is the current position of the air inlet actuator. |
| Air Quality Sensor | - | 0-100% | The scan tool displays a percentage between 0 and 100. This is a measure of the amount of pollutants at the ventilation intake. |
| Air Recirculation Door Actuator Command | - | Varies | The scan tool displays Counts. This is the position that the HVAC module is commanding for the air recirculation actuator. |
| Air Recirculation Door Actuator Direction | - | - | The scan tool displays Increase or Decrease depending the direction of movement. When the door reaches its desired position the scan tool displays Stop. |
| Air Recirculation Door Actuator Learn Status | Actuator Learned | Complete | Displays the current state of the learned status for the recirculation actuator. |
| Actuator Not Learned | Not Run | ||
| Actuator Learning | In Progress | ||
| Air Recirculation Door Position | - | Varies | The scan tool displays Counts. This is the current position of the air recirculation 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 On or Off 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 | ||
| Battery Voltage | - | 11-14 V | The scan tool displays V. This is the current battery voltage. |
| Blower Motor Speed | - | 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 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 | The scan tool displays Up, Down or Inactive depending on the state of the blower motor switches. |
| Desired Left Temperature Door Actuator Position | - | Varies | The scan tool displays Counts. This is the desired position of the left temperature actuator. |
| Desired Right Temperature Door Actuator 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 | Off | The scan tool displays On or Off depending on the state of the enhanced defrost switch. |
| Enhanced defrost switch pressed | On | ||
| HVAC Actuators Supply Voltage | - | Active | The scan tool displays Active or Inactive. Inactive is displayed if there is a malfunction at the actuators supply voltage circuit. |
| Ignition Voltage | - | 11-14 V | The scan tool displays the current voltage level of the Ignition circuit feed. |
| Left Temperature Door Actuator Direction | - | Varies | The scan tool displays Increase or Decrease depending the direction of movement. When the door reaches its desired position the scan tool displays Stop. |
| Left Temperature Door Actuator Learn Status | Actuator Learned | Complete | Displays the current state of the learned status for the left temperature actuator. |
| Actuator Not Learned | Not Run | ||
| Actuator Learning | In Progress | ||
| Left Temperature Door Position | - | Varies | The scan tool displays Counts. This is the current position of the left temperature actuator. |
| Left Temperature Switch | - | Varies | The scan tool displays Up, Down or Inactive depending on the state of the left temperature switch. |
| 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 Actuator Command | - | Varies | The scan tool displays Counts. This is the position that the HVAC module is commanding for the mode actuator. |
| Mode Door Actuator Direction | - | - | The scan tool displays Increase or Decrease depending the direction of movement. When the door reaches its desired position the scan tool displays Stop. |
| Mode Door Actuator Learn Status | Actuator Learned | Complete | Displays the current state of the learned status for the mode actuator. |
| Actuator Not Learned | Not Run | ||
| Actuator Learning | In Progress | ||
| Mode Door Position | - | Varies | The scan tool displays Counts. This is the current position of the mode actuator. |
| Mode Switch | - | Varies | The scan tool displays Up, Down or Inactive depending on the state of the MODE switch. |
| MULTI-ZONE Switch | - | Varies | The scan tool displays On or Off depending on the state of the ZONE switch. |
| Passenger Compartment Air Temperature (Filtered Data) | - | -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 Data) | - | -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 Defogger 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 | ||
| Requested Idle Boost Level | A/C ON | 0-255 Counts | This reflects the amount of assistance required to maintain the desired idle level due to the A/C load on the engine. |
| Right Temperature Door Actuator Direction | - | Varies | The scan tool displays Increase or Decrease depending the direction of movement. When the door reaches its desired position the scan tool displays Stop. |
| Right Temperature Door Actuator Learn Status | Actuator Learned | Complete | Displays the current state of the learned status for the right temperature actuator. |
| Actuator Not Learned | Not Run | ||
| Actuator Learning | In Progress | ||
| Right Temperature Door Position | - | Varies | The scan tool displays Counts. This is the current position of the right temperature actuator. |
| Right Temperature Switch | - | Varies | The scan tool displays Up, Down or Inactive depending on the state of the right temperature switch. |
| Sun Azimuth | - | 0-90° | The scan tool displays °. This is the current angle in the horizontal plane between the sun and the vehicle driving direction. |
| Sun Elevation | - | 0-360° | The scan tool displays °. This is the current angle in the vertical sun height. |
| Sunload | - | 0-1200 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 |
|---|---|
| A/C Indicator | The HVAC control module illuminates the A/C indicator when commanded from the scan tool. |
| A/C Switch | This control function simulates the state of the A/C switch. |
| Air Recirculation Door Motor Direction | The HVAC control module commands the air recirculation actuator from venting to recirculation and back again. |
| Air Recirculation LED Command | The HVAC control module illuminates the Air Recirculation indicator when commanded from the scan tool. |
| Air Recirculation Mode Switch | When On is selected, the HVAC control module commands the air recirculation door from outside air to recirculation. When Off is selected, the HVAC control module commands the air recirculation door from recirculation to outside air. |
| Auto HVAC Indicator | The HVAC control module illuminates the Auto indicator when commanded from the scan tool. |
| Blower Motor Speed Command | The HVAC control module commands the blower motor speed from 0 to 100% and back again. |
| Enhanced Defrost Indicator | The HVAC control module illuminates the enhanced defrost indicator when commanded from the scan tool. |
| HVAC Actuators | The HVAC control module executes the Motor Learn Routine when commanded from the scan tool. |
| HVAC Afterblow Configuration | This control function disables and enables the afterblow configuration. |
| Left Temperature Door Actuator Direction | When Increase is selected, the left temperature door position increases stepwise. When Decrease is selected, the left temperature door position decreases stepwise. |
| Mode Door Position | When Floor is selected, the HVAC control module commands the mode actuator to the floor position. When Defrost is selected, the HVAC control module commands the actuator to the defrost position. |
| Recirculation Door | The HVAC control module commands the recirculation actuator stepwise from outside air to recirculation and back again. |
| Right Temperature Door Position | When Increase is selected, the right temperature door position increases stepwise. When Decrease is selected, the right temperature door position decreases stepwise. |