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 Evaporator Temperature Sensor | 40 to +80C (40 to +176F) | 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 Inlet Door Motor Calibration Status | Varies | The scan tool displays Not Running, In Progress, Complete or Failed depending the calibration status. | |
| 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 | ||
| Battery Voltage | 11-14V | The scan tool displays V. This is the current battery voltage. | |
| Bilevel Indicator | Varies | The scan tool displays On or Off depending on the state of the Bilevel switch. | |
| Bilevel Switch | Varies | The scan tool displays Active or Inactive depending on the state of the Bilevel switch. | |
| Blower Motor Switch | Varies | Only with C68 The scan tool displays OFF, 18 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 Temperature | Varies | The scan tool displays °C (°F). This is the selected temperature at the temperature switch. | |
| Desired Left Temperature Motor Door 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 | Off | The scan tool displays On or Off depending on the state of the enhanced defrost switch. |
| Enhanced defrost switch pressed | On | ||
| 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 | Off | The scan tool displays On or Off depending on the state of the floor mode switch. |
| Floor mode switch pressed | On | ||
| 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 | Off | The scan tool displays On or Off depending on the state of the front defrost switch. |
| Front 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. | |
| 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 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. | |
| Left Temperature Door Motor Calibration Status | Varies | The scan tool displays Not Running, In Progress, Complete or Failed depending the calibration status. | |
| Left Temperature Door Motor Direction | 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 temperature actuator. | |
| Left Temperature Knob Position | Varies | The scan tool displays Counts. The value varies between 5 to +5 depending the selected temperature knob position. At the cold end position is the value 18 and at the hot end position 18. | |
| Mode Door Motor Calibration Status | Varies | The scan tool displays Not Running, In Progress, Complete or Failed depending the calibration status. | |
| 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 | ||
| Recirculation Door Motor Direction | Air recirculation mode is deactivated | Outside Air | The scan toll displays Stop, Outside Air, Increase, Recirculation, Decrease or Not Used depending on the state of the recirculation door. During the movement of the door, the scan tool shows Increase or Decrease depending the movement direction. |
| Air recirculation mode is activated | Recirculation | ||
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 | 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. |
| Blower Speed Indicator 16 | The HVAC control module illuminates the appropriate blower speed indicator when commanded from the scan tool. |
| Blower Motor Switch | This control function simulates the state of the blower motor switch. |
| Front Defrost Indicator | The HVAC control module illuminates the front 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 Motor Direction | When Increase is selected, the left temperature door position increases stepwise. When Decrease is selected, the left temperature door position decreases stepwise. |
| Left Temperature Door Position | This commands the left temperature door position from Cold to Hot. |
| Mode Door Motor Command | The HVAC control module commands the mode actuator stepwise from defrost to floor and back again. |
| 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 Defog | The HVAC control module commands the rear defogger On and Off. |
| Rear Defog Indicator | The HVAC control module commands the rear defogger indicator On and Off. |
| Recirculation Door | The HVAC control module commands the recirculation actuator stepwise from outside air to recirculation and back again. |