Heating, Ventilation and Air Conditioning Control Module Scan Tool Information
HVAC Control Module Scan Tool Data Parameters
| Parameter | System State | Expected Value | Description |
|---|---|---|---|
| Operating Conditions: Ignition ON | |||
| A/C Evap. Temperature Sensor | - | Varies | This displays Counts. This is the evaporator temperature measured in counts. |
| A/C LED | - | Off | The scan tool displays On or Off. This is the state of the air conditioner light emitting diode (LED) indicator. |
| A/C Request | - | No | The scan tool displays Yes or No. Yes is displayed if the air conditioner is requested. |
| Aux. Blower Motor Speed | - | Varies | This displays Counts. This is the auxiliary blower motor speed measured in counts. |
| Aux. Blower Motor Switch | - | Off | The scan tool displays Invalid, Auxiliary, Off, 1, 2 or 3. This is the state of the auxiliary blower motor switch. |
| Aux. Blower Mtr. Spd. Command | - | Varies | This displays Counts. This is the commanded auxiliary blower motor speed measured in counts. |
| Aux. Mode Door Actual | - | Varies | This displays Counts. This is the actual auxiliary mode door position measured in counts. |
| Aux. Mode Door Commanded | - | Varies | This displays Counts. This is the commanded auxiliary mode door position measured in counts. |
| Aux. Temp. Dr. Motor Command | - | Varies | This displays Counts. This is the commanded auxiliary temperature door motor measured in counts. |
| Aux. Temp. Dr. Position | - | Varies | This displays Counts. This is the auxiliary temperature door position measured in counts. |
| Blower Motor Switch | - | Off | The scan tool displays Off, On, High or Invalid. This is the state of the blower motor switch. |
| Defrost Door Actual | - | Varies | This displays Counts. This is the actual defrost door position measured in counts. |
| Defrost Door Commanded | - | Varies | This displays Counts. This is the commanded defrost door position measured in counts. |
| Driver Heated Seat Status | - | Off | The scan tool displays High, Low or Off. This is the state of the driver heated seat. |
| Driver Temp. Dr. Motor Command | - | Varies | This displays Counts. This is the commanded driver temperature door motor measured in counts. |
| Driver Temp. Dr. Position | - | Varies | This displays Counts. This is the driver temperature door position measured in counts. |
| Ignition Voltage Signal | - | Varies | This displays Volts. This is the current ignition voltage signal. |
| Mode Door Commanded | - | Varies | This displays Counts. This is the commanded mode door position measured in counts. |
| Mode Door Position | - | Varies | This displays Counts. This is the current mode door position measured in counts. |
| Mode Status | - | Varies | The scan tool displays Invalid, Vent, Mix-Blend, Floor, Bi-Level, Defrost or Recirc. This is the mode status. |
| Passenger Heated Seat Status | - | Off | The scan tool displays High, Low or Off. This is the state of the passenger heated seat. |
| Psgr. Temp. Dr. Motor Command | - | Varies | This displays Counts. This is the commanded passenger temperature door motor measured in counts. |
| Psgr. Temp. Dr. Position | - | Varies | This displays Counts. This is the current passenger temperature door position measured in counts. |
| Rear Defrost LED | - | Off | The scan tool displays On or Off. This is the state of the rear defrost indicator. |
| Recirculation Dr. Motor Command | - | Varies | This displays Counts. This is the commanded recirculation door motor measured in counts. |
| Recirculation Dr. Position | - | Varies | This displays Counts. This is the recirculation door position measured in counts. |
HVAC Control Module Scan Tool Output Controls
| Output Control | Description |
|---|---|
| A/C Request | The HVAC control module sends out a A/C request signal to turn on the A/C compressor when you select ON. The request signal should stay active until commanded OFF. |
| All Status LEDs | The scan tool displays Commanded State: On or Off. This function commands all LEDs On or Off. |
| Auxiliary Air Temp. Door | The HVAC control module commands the auxiliary air temperature actuator towards 255 counts when you select ON. The HVAC control module commands the auxiliary air temperature actuator towards 0 counts when commanded OFF. |
| Auxiliary Blower Motor | This functions commands Auxiliary Blower Motor On or Off. |
| Auxiliary Mode Door | The HVAC control module commands the auxiliary Mode actuator towards 255 counts when you select ON. The HVAC control module commands the auxiliary Mode actuator towards 0 counts when commanded OFF. |
| Defrost Mode | The HVAC control module commands the Defrost actuator towards 255 counts when you select ON. The HVAC control module commands the Defrost actuator towards 0 counts when commanded OFF. |
| Left Temp. Door Position | The HVAC control module commands the left air temperature actuator towards 255 counts when you select ON. The HVAC control module commands the left air temperature actuator towards 0 counts when commanded OFF. |
| Mode Door Position | The HVAC control module commands the Mode actuator towards 255 counts when you select ON. The HVAC control module commands the Mode actuator towards 0 counts when commanded OFF. |
| Recalibrate All Motors | The scan tool displays Commanded State: None or On. This functions commands all actuators to their fully opened and fully closed positions, and relearns these endpoints. |
| Recirculation Door | The HVAC control module commands the recirculation actuator towards 0 counts when you select ON. The HVAC control module commands the recirculation actuator towards 255 counts when you select OFF. |
| Right Temp. Door Position | The HVAC control module commands the right air temperature actuator towards 255 counts when you select ON. The HVAC control module commands the right air temperature actuator towards 0 counts when commanded OFF. |