Heating, Ventilation and Air Conditioning Control Module Scan Tool Information RHD
HVAC Scan Tool Data Parameters
Parameter | Operating Conditions | Expected Value | Definition |
|---|---|---|---|
Ignition is ON, engine OFF, and vehicle is stationary | |||
A/C Compressor Current | 0.008 A | This parameter displays the current of the A/C Compressor. | |
A/C Compressor PWM | % | ||
A/C Mode Request | -- | Disengaged | The scan tool displays Engage when the ECM receives a GMLAN message from the HVAC control module to engage the A/C compressor. The scan tool displays Disengaged when the ECM receives a GMLAN message from the HVAC control module to disengage the A/C compressor. |
-- | Engaged | ||
A/C Pressure | -- | 448 kpa | The scan tool displays 0-3450 kPa (0-500 psi). The voltage applied to the PCM input from the A/C refrigerant pressure sensor is converted to a pressure value. |
A/C Status | Active | This parameter displays the status of the A/C system. | |
Inactive | |||
A/C Switch | Active | The scan tool displays Active/Inactive. The scan tool displays Active when the A/C request switch is on. The scan tool displays Inactive when the A/C request switch is off. | |
Inactive | |||
Actual Drivers Air Mix Door Pos. | -- | 0 - 100% | The scan tool displays 0-100 %. The actual position of the drivers air mix door interpreted as a percentage by the HVAC control module. |
Actual Front Demister Door Pos. | -- | 0 - 100% | The scan tool displays 0-100 %. The actual position of the front demister door interpreted as a percentage by the HVAC control module. |
Actual Passenger Air Mix Door Pos. | -- | 0 - 100% | The scan tool displays 0-100 %. The actual position of the passengers air mix door interpreted as a percentage by the HVAC control module. |
Actual Rear Air Mix Door Pos. | -- | 0 - 100% | The scan tool displays 0-100 %. The actual position of the rear air mix door interpreted as a percentage by the HVAC control module. |
Actual Rear Outlet Door Pos. | -- | 0 - 100% | The scan tool displays 0-100 %. The actual position of the rear outlet door interpreted as a percentage by the HVAC control module. |
Actual Recirculation Door Position | -- | 0 - 100% | The scan tool displays 0-100 %. The actual position of the recirculation door interpreted as a percentage by the HVAC control module. |
Actual Vent/Floor Outlet Door Pos. | -- | 0 - 100% | The scan tool displays 0-100 %. The actual position of the vent/floor outlet door interpreted as a percentage by the HVAC control module. |
Auto Switch | Active | The scan tool displays Active/Inactive. The scan tool displays Active when the automatic switch is on. The scan tool displays inactive when the automatic switch is off. | |
Inactive | |||
Backup System Power Mode | Invalid | ||
Valid | |||
Battery Voltage | The scan tool displays 0-25 volts. The voltage measured from the battery positive voltage circuit and the ground circuit of the HVAC control module. | ||
Blower Fan Speed Decrease | Active | The scan tool displays Active/Inactive. The scan tool displays Active when the Blower Fan Speed Decrease is on. The Scan tool displays inactive when the Blower Fan Speed Decrease is off. | |
Inactive | |||
Blower Fan Speed Increase | Active | The scan tool displays Active/Inactive. The scan tool displays Active when the Blower Fan Speed Increase is on. The Scan tool displays inactive when the Blower Fan Speed Increase is off. | |
Inactive | |||
Blower Fan Speed PWM | 0 - 114% | The scan tool displays 0-114%. The scan tool displays the control decision for the blower motor speed as determined by the HVAC control module. The scan tool displays 114% when the blower motor is commanded to maximum speed and 0% when the blower motor is commanded OFF. | |
Blower Fan Speed Voltage | 1.4 Volts | ||
Commanded Drivers Air Mix Door Pos. | -- | 0 - 100% | The scan tool displays 0-100 %. The commanded position of the drivers air mix door interpreted as a percentage by the HVAC control module. |
Commanded Front Demister Door Pos. | -- | 0 - 100% | The scan tool displays 0-100 %. The commanded position of the front demister door interpreted as a percentage by the HVAC control module. |
Commanded Passenger Air Mix Door Pos. | -- | 0 - 100% | The scan tool displays 0-100 %. The commanded position of the passengers air mix door interpreted as a percentage by the HVAC control module. |
Commanded Rear Air Mix Door Pos. | -- | 0 - 100% | The scan tool displays 0-100 %. The commanded position of the rear air mix door interpreted as a percentage by the HVAC control module. |
Commanded Rear Outlet Door Pos. | -- | 0 - 100% | The scan tool displays 0-100 %. The commanded position of the rear outlet door interpreted as a percentage by the HVAC control module. |
Commanded Recirculation Door Pos. | -- | 0 - 100% | The scan tool displays 0-100 %. The commanded position of the recirculation door interpreted as a percentage by the HVAC control module. |
Commanded Vent/Floor Outlet Door Pos. | -- | 0 - 100% | The scan tool displays 0-100 %. The commanded position of the vent/floor outlet door interpreted as a percentage by the HVAC control module. |
Driver Set Temp | 23 degrees | The Scan Tool displays the temperature as set by the driver. | |
Driver Temperature Dial | 0 | The scan tool displays the position of the Driver Temperature Dial. | |
Engine Coolant Temp | -- | 18 degrees | The scan tool displays -39 to +140°C (-38 to +284°F). The scan tool displays the engine coolant temperature as detected by the ECM. |
Engine ECU A/C Compressor Command | Not Allowed | ||
Engine Speed | 0 RPM | The scan tool displays the Speed of the Engine in revolutions per minute. | |
Evaporator Target Temp | -- | -40 degrees | |
Evaporator Temp | -- | 15 degrees | |
Evaporator Temp | -- | 15.5 degrees | |
Front Demister Switch | Front demister switch activated | Active | The scan tool displays Active/Inactive. The scan tool displays Active when the Front Demister switch is on. The scan tool displays Inactive when the Front Demister switch is off. |
Front demister switch deactivated | Inactive | ||
Front Outlet Mode | Floor | ||
In Car Temp | -- | 20 degrees | The scan tool displays -40 to +215°C (-40 to +419°F). The voltage applied to the HVAC control module input for the inside air temperature sensor is converted to a temperature value. |
Inlet Mode | Fresh | ||
Mode Decrease Switch | Mode decrease switch activated | Active | The scan tool displays Active/Inactive. The scan tool displays Active when the mode switch is on. The scan tool displays Inactive when the mode switch is off. |
Mode decrease switch deactivated | Inactive | ||
Mode Increase Switch | Mode increase switch activated | Active | The scan tool displays Active/Inactive. The scan tool displays Active when the mode switch is on. The scan tool displays Inactive when the mode switch is off. |
Mode increase switch deactivated | Inactive | ||
OFF Switch | OFF switch activated | Active | The scan tool displays ON/OFF. The scan tool displays ON when the OFF switch is active. The scan tool displays OFF when the OFF switch is inactive. |
OFF switch deactivated | Inactive | ||
Outside Temp | -- | 18.5 degrees | The scan tool displays -40 to +215°C (-40 to +419°F). The voltage applied to the HVAC control module input for the ambient air temperature sensor is converted to a temperature value. |
Passenger Set Temp | The scan tool displays the temperature as set by the passenger. | ||
Passenger Temperature Dial | 0 | The scan tool displays the position of the Passenger Temperature Dial. | |
Rear Mode Switch | Rear mode switch activated | Active | The scan tool displays Active/Inactive. The scan tool displays Active when the Rear mode switch is on. The scan tool displays Inactive when the Rear mode switch is off. |
Rear mode switch deactivated | Inactive | ||
Rear Outlet Mode | Compartment | ||
Rear Temperature Dial | 0 | The scan tool displays the position of the Rear Temperature Dial. | |
Rear Window Demister | Rear window demister activated | Active | The scan tool displays the status of the rear window demister, Active when the rear window demister is activated and Inactive when the rear window demister is deactivated. |
Rear window demister deactivated | Inactive | ||
Rear Window Demister Switch | Rear window demister switch activated | Active | The scan tool displays the current position of the rear window demister switch, Active when the rear window demister switch is activated and Inactive when the rear window demister switch is deactivated. |
Rear window demister switch deactivated | Inactive | ||
Recirculation Switch | Recirculation switch activated | Active | The scan tool displays the current position of the recirculation switch, Active when the recirculation switch is activated and Inactive when the recirculation switch is deactivated. |
Recirculation switch deactivated | Inactive | ||
Solar Sensor Driver | -- | % | The scan tool displays the current light intensity detected by the driver solar sensor as a percentage value. |
Solar Sensor Passenger | -- | % | The scan tool displays the current light intensity detected by the passenger solar sensor as a percentage value. |
System Power Mode | Ignition is in OFF position | OFF | The scan tool displays the current position of the ignition cycle. |
Ignition is in ACC position | Accessory | ||
Ignition is in RUN position | Run | ||
Ignition is in CRANK position | Crank | ||
Vehicle Speed | -- | 0km | The scan tool range is 0-255 km/h (0-158 mph). This parameter indicates the vehicle speed calculated by the ECM from the vehicle speed sensor (VSS). |
Zone Configuration | Zone configuration selected | OFF | The scan tool displays the zone configuration status. |
Zone configuration deselected | ON | ||
Zone Switch | Zone switch activated | Active | The scan tool displays the current position of the zone switch, Active when the zone switch is activated and Inactive when the zone switch is deactivated. |
Zone switch deactivated | Inactive | ||
HVAC Control Module Scan Tool Output Controls
Scan Tool Output Control | Additional Menu Selections | Description |
|---|---|---|
Air Inlet Door Position | HVAC Motors | When you select Outside, the HVAC control module commands the recirculation actuator toward the outside air position. When you select Recirculation, the HVAC control module commands the recirculation actuator toward the recirculation position. |
Blower Motor | Miscellaneous Test | When you select ON, the HVAC control module commands the blower motor relay ON. When you select OFF, the HVAC control module commands the blower motor relay OFF. |
Driver Temp Door Position | HVAC Motors | When you select Cold, the HVAC control module commands the driver air temperature actuator to the full cold position. When you select Hot, the HVAC control module commands the actuator to the full hot position. |
Mode Door Position | HVAC Motors | When you select A/C, the HVAC control module commands the mode actuator to the face position. When you select Defrost, the HVAC control module commands the actuator to the defrost position. |
Passenger Temp Door Position | HVAC Motors | When you select Cold, the HVAC control module commands the passenger air temperature actuator to the full cold position. When you select Hot, the HVAC control module commands the actuator to the full hot position. |
Heating, Ventilation and Air Conditioning Control Module Scan Tool Information LHD
Heating Ventilation Air Conditioning Scan Tool Data Parameters
Parameter | Operating Conditions | Expected Value | Definition |
|---|---|---|---|
Ignition is ON, engine OFF, and vehicle is stationary | |||
A/C Head Pressure | -- | 448 kpa | The scan tool displays 0-3450 kPa (0-500 psi). The voltage applied to the BCM input from the A/C refrigerant pressure sensor is converted to a pressure value. |
A/C Head Pressure | -- | Normal | The scan tool displays Normal or Out of Range. This is the state of the A/C head pressure. |
-- | Out of Range | ||
A/C Permission | -- | Granted | The scan tool displays Granted or Withheld. This is the state of the A/C. |
-- | Withheld | ||
A/C Request | A/C button pressed | Yes | The scan tool displays Yes or No. The scan tool displays Yes when the A/C request switch is on. The scan tool displays No when the A/C request switch is off. |
A/C button depressed | No | ||
Air Inlet Door Actual | -- | % | This displays Counts. This is the current numeric value of the air inlet door as monitored by the HVAC module. |
Air Inlet Door Commanded | -- | % | This displays Counts. This is the numeric value of the air inlet door as commanded by the HVAC module. |
Aux. Mode Door Actual | -- | % | This displays Counts. This is the current numeric value of the auxiliary mode door as monitored by the HVAC module. |
Aux. Mode Door Commanded | -- | % | This displays Counts. This is the numeric value of the auxiliary mode door as commanded by the HVAC module. |
Battery Voltage | -- | 12 Volts | The scan tool displays 0 - 25 volts. The voltage measured from the battery positive voltage circuit and the ground circuit of the HVAC control module. |
Blower Motor Relay Command | -- | On | The scan tool displays On/Off. When you select ON, the HVAC control module commands the blower motor relay ON. When you select OFF, the HVAC control module commands the blower motor relay OFF. |
-- | Off | ||
Blower Motor Speed | -- | % | This displays percent. This is the percentage of power supplied to the blower motor. |
Blower Speed | -- | Normal | The scan tool displays Normal or Off. This is the state of the blower motor speed. |
-- | Off | ||
Compressor Performance Test Status | -- | Active | |
-- | Not Active | ||
Coolant Temperature | -- | Degrees | The scan tool displays -39 to +140°C (-38 to +284°F). The scan tool displays the engine coolant temperature as detected by the ECM. |
Driver Solar Sensor | -- | W/m² | This displays W/m². This is an approximate value at the driver sunload sensor. |
Driver Temp. Dr. Actual | -- | % | This displays Counts. This is the current numeric value of the driver temperature door as monitored by the HVAC module. |
Driver Temp. Dr. Commanded | -- | % | This displays Counts. This is the numeric value of the driver temperature door as commanded by the HVAC module. |
Driver Temp. Setting | -- | Degrees | This displays °C (°F). This is the temperature setting of the driver side area. |
Evaporator Temp | -- | 15.5 degrees | This parameter displays the current temperature of the evaporator |
Inside Air Temp. Filtered | -- | Degrees | This displays °C (°F). This is the current temperature of the vehicle interior. |
Mode Door Actual | -- | % | This displays Percentage. This is the current numeric value of the mode door as monitored by the HVAC module. |
Mode Door Commanded | -- | % | This displays Percentage. This is the numeric value of the mode door as commanded by the HVAC module. |
Outside Air Temperature Filtered | ° | This displays °C (°F). This is the current temperature of the air outside. | |
Passenger Solar Sensor | -- | W/m² | This displays W/m². This is an approximate value at the passenger sunload sensor. |
Passenger Temp. Dr. Actual | -- | % | This displays Counts. This is the current numeric value of the passenger temperature door as monitored by the HVAC module. |
Passenger Temp. Dr. Commanded | -- | % | This displays Counts. This is the numeric value of the passenger mode door as commanded by the HVAC module. |
Passenger Temp. Setting | -- | Degrees | This displays °C (°F). This is the temperature setting of the passenger side area. |
Power Mode | Ignition is in OFF position | OFF | The scan tool displays the system power mode which is dependent on the current position of the ignition cycle. |
Ignition is in ACC position | Accessory | ||
Ignition is in RUN position | Run | ||
Ignition is in CRANK position | Crank | ||
Rear Defog Relay | -- | Active | The scan tool displays Active or Inactive. This is the state of the rear defrost switch. |
-- | Inactive | ||
Remote Start Status | -- | Active | The scan tool displays Active or Inactive. |
-- | Inactive | ||
Heating Ventilation Air Conditioning Control Module Scan Tool Output Controls
Scan Tool Output Control | Additional Menu Selections | Description |
|---|---|---|
A/C Compressor Performance | Special Function | |
Air Inlet Door | Special Function | The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions. |
Aux. Mode Door | Special Function | The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions. |
Blower Motor Relay | Miscellaneous Test | The scan tool commands the blower motor relay On or Off. When you select ON, the HVAC control module commands the blower motor relay ON. When you select OFF, the HVAC control module commands the blower motor relay OFF. |
Blower Motor | Miscellaneous Test | The scan tool commands the blower motor On or Off. When ON is selected, the HVAC control module commands the blower motor relay ON and a command to increase or decrease air. When OFF is selected, the HVAC control module commands the blower motor relay OFF. |
Driver Temp. Dr. | Special Function | The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions. |
Mode Door position | Special Function | The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions. |
Passenger Temp. Dr. Commanded | Special Function | The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions. |
Rear Defog Request | Special Functions | The scan tool commands the rear defog Active or Inactive. |
