Heating, Ventilation and Air Conditioning Control Module Scan Tool Information
HVAC Control Module Scan Tool Data Parameters
| Parameter | System State | Expected Value | Definition |
|---|---|---|---|
| Operating Conditions : Engine ON | |||
| A/C Head Pressure | - | Normal | The scan tool displays Normal or Out of Range. |
| A/C LED | - | Varies | The scan tool displays On or Off. This is the current state of the A/C indicator LED. |
| A/C Request | - | No | The scan tool displays Yes or No. Yes is displayed if the air conditioning is requested. |
| Ambient Air Temperature | - | Normal | The scan tool displays Normal or Out of Range. |
| Ambient Air Temp. Sensor | - | Varies | The scan tool displays °C (°F). This is the outside air temperature. |
| Battery Voltage | - | Normal | The scan tool displays Normal or Out of Range. |
| Blower Motor Speed Command | - | Varies | The scan tool displays 0-100 percent. This is the numeric value in percent of the blower motor speed as commanded by the HVAC module. |
| Blower Speed | - | Normal | The scan tool displays Normal or Off. |
| Coolant Temperature | - | Varies | This displays °C (°F). This is the current temperature of the engine coolant. |
| Driver Heated Seat Switch | - | Inactive | The scan tool displays Inactive or Active. This is the current state of the driver heated seat switch. |
| Driver Temp. Dr. Motor Command | - | Varies | This displays counts. This is the numeric value of the driver temperature door commanded by the HVAC module. |
| Driver Temp. Dr. Position | - | Varies | This displays counts. This is the current value of the driver temperature door as monitored by the HVAC module. |
| Engine Coolant Temp | - | Normal | The scan tool displays Normal or Out of Range. |
| Engine Running | - | Yes | The scan tool displays Yes or No. |
| Mode Dr. Motor Command | - | Varies | This displays counts. This is the numeric value of the mode door commanded by the HVAC module. |
| Mode Door Position | - | Varies | This displays counts. This is the current value of the mode door as monitored by the HVAC module. |
| Mode Select Position | - | Varies | The scan tool displays Invalid, Auto, Panel, Bi-Level, Heater, Htr./Def., or Defrost. This is the current position of the mode select switch. |
| Outside Air LED | - | Off | The scan tool displays On or Off. This is the current state of the outside air indicator LED. |
| Outside Air Temp. | - | Varies | This displays °C (°F). This is the raw value of the outside air temperature. |
| Passenger Heated Seat Switch | - | Inactive | The scan tool displays Inactive or Active. This is the current state of the passenger heated seat switch. |
| Psgr. Temp. Dr. Motor Command | - | Varies | This displays counts. This is the numeric value of the passenger temperature door commanded by the HVAC module. |
| Psgr. Temp. Dr. Position | - | Varies | This displays counts. This is the current value of the passenger temperature door as monitored by the HVAC module. |
| Rear Defrost LED | - | Varies | The scan tool displays On or Off. This is the current state of the rear defrost indicator LED. |
| Rear Defrost State | - | Off | The scan tool displays On or Off. This is the current state of the rear defroster. |
| Recirculation Dr. Motor Command | - | Varies | This displays counts. This is the numeric value of the recirculation door commanded by the HVAC module. |
| Recirculation Dr. Position | - | Varies | This displays counts. This is the current value of the recirculation door as monitored by the HVAC module. |
| Recirculation LED | - | Varies | The scan tool displays On or Off. This is the current state of the recirculation mode indicator LED. |
| Temperature Dr. Motor Command | - | Varies | This displays counts. This is the numeric value of the temperature door commanded by the HVAC module. |
| Temperature Dr. Position | - | Varies | This displays counts. This is the current value of the temperature door as monitored by the HVAC module. |
| Vehicle Speed | - | Varies | This displays the current vehicle speed in MPH. |
HVAC Control Module Scan Tool Output Controls
| Scan Tool Output Control | Description |
|---|---|
| A/C LED | This command allows you to turn the A/C LED On and Off. |
| A/C Request | This command allows you to turn the A/C relay On and Off. When the A/C relay is commanded On, the A/C compressor clutch should be engaged. |
| Air Inlet Door Position | The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions. |
| All Status LEDs | This command allows you to turn the all HVAC status LEDs On and Off. |
| Blower Motor | The scan tool displays Off or On selections. This function allows you to command the blower motor to its maximum or minimum speeds. |
| Driver Heated Seat LED | This command allows you to turn the driver heated seat LED On and Off. |
| Left Temp. Door Position | The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions. |
| Mode Door Position | The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions. |
| Psgr. Heated Seat LED | This command allows you to turn the passenger heated seat LED On and Off. |
| Rear Defog LED | This command allows you to turn the rear defog LED On and Off. |
| Recalibrate All Motors | When ON is selected, all air temp and mode actuators have the capability to perform a recalibration. |
| Recirc. LED | This command allows you to turn the recirculation LED On and Off. |
| Right Temp. Door Position | The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions. |