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| Table 1: | Heating Ventilation and Air Conditioning Control Module Scan Tool Data Parameters |
| Table 2: | Heating Ventilation and Air Conditioning Control Module Scan Tool Output Controls |
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 inhibited. |
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 Door Actuator Command | - | Varies | The scan tool displays Counts. This is the desired position of the air recirculation door actuator. |
Air Recirculation Door Actuator Direction | - | Varies | The scan tool displays Stop, Increase or Decrease. During the movement of the air recirculation door, the scan tool shows Increase or Decrease depending on the movement direction. When the selected position of the door is reached, the scan tool displays Stop. |
Air Recirculation Door Actuator Learn Status | - | Varies | The scan tool displays Not Running, In Progress, Complete or Failed depending the calibration status. |
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. |
Air Quality Sensor | - | 5-95% | The scan tool displays %. The value increases with the increasing of the pollution of the ambient air. |
Air Quality Sensor Switch Indicator | - | Varies | The scan tool displays On or Off depending on the state of the automatic recirculation switch. |
Air Quality Sensor Switch | - | Varies | The scan tool displays On or Off depending on the state of the automatic recirculation switch. |
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 | ||
Auxiliary Heater Output Status | - | OK | The scan tool displays OK or Malfunction. Malfunction is displayed if there is an auxiliary heater malfunction. |
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 OFF, 1-8 depending on the state of the selected blower motor speed. |
Desired Left Temperature Door Actuator Position | - | Varies | The scan tool displays Counts. This is the desired position of the left 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 HVAC System Status | - | Varies | The scan tool displays On or Off depending on the state of the POWER switch. |
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 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 Actuator Learn Status | - | Varies | The scan tool displays Not Running, In Progress, Complete or Failed depending the calibration status. |
Left Temperature Door Actuator Direction | - | Varies | The scan tool displays Stop, Increase or Decrease. During the movement of the left temperature door, the scan tool shows Increase or Decrease depending the movement direction. When the selected 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 counts. Only with C67 The value varies between -7 to +7 depending the selected temperature knob position. At the left end position is the value 16 and at the right end position -16. Only with C68 The value varies between -5 to +5 depending the selected temperature knob position. At the left end position is the value 18 and at the right end position -18. |
Lower Left Duct 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. |
Mode Door Actuator 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 Actuator Learn Status | - | Varies | The scan tool displays Not Running, In Progress, Complete or Failed depending the calibration status. |
Mode Door Position | - | Varies | The scan tool displays Counts. This is the current position of the mode door actuator. |
Mode Switch | - | Varies | The scan tool displays Up or Inactive depending on the state of the mode 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 windscreen 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 Demister 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 demister 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 | ||
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 | - | 0-1 200 W/m² | The scan tool displays W/m². This is the current sun heat intensity. |
Upper Left Duct 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. |
Windscreen Temperature | - | -40 to +80°C (-40 to + 176°F) | The scan tool displays °C (°F). This is the current temperature at the windscreen temperature sensor. |
Output Control | Description |
|---|---|
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 door actuator from venting to recirculation and back again. |
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. |
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. |
HVAC Afterblow Configuration | This control function disables and enables the afterblow configuration. |
Illuminate All Indicators | The HVAC control module illuminates all indicators when commanded from the scan tool. |
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. |
Rear Demister | The HVAC control module commands the rear defogger On and Off. |
| © Copyright Chevrolet. All rights reserved |
| © Copyright Chevrolet. All rights reserved |
