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Heating, Ventilation and Air Conditioning Control Module Scan Tool Information

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

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 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.

Heating Ventilation and Air Conditioning Control Module Scan Tool Output Controls

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.

   


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