Heating, Ventilation and Air Conditioning Control Module Scan Tool Information
WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. 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 Status | Engine running, A/C Off | Disengaged | The scan tool displays Engaged or Disengaged depending on the state of the A/C compressor. |
| Engine running, A/C On | Engaged | ||
| 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 | Inactive | The scan tool displays Active or Inactive depending on the state of the A/C mode. |
| A/C On | Active | ||
| 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 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. |
| Battery Voltage | - | 11-14 V | The scan tool displays V. This is the current battery voltage. |
| Engine Coolant Temperature | - | -40 to +215°C (-40 to +419°F) | The scan tool displays °C (°F). This is the current engine coolant temperature. |
| Ignition Voltage | - | 11-14 V | The scan tool displays V. This is the current ignition voltage. |
| 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 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 | ||
Heating Ventilation and Air Conditioning Control Module Scan Tool Output Controls
| Output Control | Description |
|---|---|
| A/C Switch | This control function simulates the state of the A/C switch. |
| 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. |
| Illuminate All Indicators | This control function will illuminate all indicators on the HVAC control module. |