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Scan Tool Data List

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
HVAC Control Module Scan Tool Data List

Scan Tool Parameter Data List Units Displayed Typical Data Value
Operating Conditions: Engine idling, A/C ON, ambient air temperature between 22-27°C (70-80°F)
A/C Head Pressure A/C Permission Yes, No No
A/C Switch Input/Output On, Off Off
AC Compressor Feedback Input/Output On, Off Varies
AC Permission Input/Output Withheld, Granted Varies
AC/Heater Door Actual Door Positions Counts Varies
AC/Heater Door Commanded Door Positions Counts Varies
AC/Heater Motor Drive Door Positions Stop, Increase, Decrease Stop
Air Mix Door Left Commanded Door Positions Counts Varies
Air Mix Door Right Commanded Door Positions Counts Varies
Battery Voltage Input/Output Volts 13.5-14.5 V
Blower Motor Status Input/Output Active/Inactive Active
Blower Speed A/C Permission Yes, No No
Defrost Door Actual Door Positions Counts Varies
Defrost Door Commanded Door Positions Counts Varies
Defrost Motor Drive Door Positions Stop, Increase, Decrease Stop
Engine Coolant Temp A/C Permission Yes, No No
Engine Running A/C Permission Yes, No No
Ign. Since Current DTC Input/Output Numeric 0
Left Mix Door Actual Door Positions Counts Varies
Left Mix Motor Drive Door Positions Stop, Increase, Decrease Stop
Left Temp. Detent Pos. Input/Output 0-18 Hot 18/Cold 0
Mode Select Position Door Positions Off, Defrost, Heater, Htr/Def, Bi-level, Panel Varies
Outside Air Temp A/C Permission Yes, No No
Pressure Cycle Switch A/C Permission Yes, No No
Pressure Cycle Switch Input/Output Low Pressure, Normal Varies
Recirculate Switch Input/Output On, Off Off
Right Mix Door Actual Door Positions Counts Varies
Right Mix Motor Drive Door Positions Stop, Increase, Decrease Stop
Right Temp. Detent Pos. Input/Output 0-18 Hot 18/Cold 0
Rear HVAC Control Module Scan Tool Data List

Scan Tool Parameter Data List Units Displayed Typical Data Value
Operating Conditions: Engine idling, A/C ON, ambient air temperature between 22-27°C (70-80°F)
Air Mix Door Actual Door Positions Counts Varies
Air Mix Door Commanded Door Positions Counts Varies
Battery Voltage Input/Output Volts 13.5-14.5 V
Console Mode Door Actual Door Positions Counts 0.0 Volts
Console Mode Door Commanded Door Positions Counts Varies
Driver Override Switch Input/Output Rear, Off, Low, Med, High Varies
Heater Water Valve Input/Output Open, Closed Closed
Ign. Since Current DTC Input/Output Cycles Varies
Mode Door Actual Door Positions Counts Varies
Mode Door Commanded Door Positions Counts Varies
Rear Blower Speed Input/Output Off, Low, Med, High Varies
Rear HVAC Fan Speed Input/Output Off, Low, Med, High Varies
Rear HVAC Motor Pos. Door Positions Lower, Bi-level, Upper Bi-level
Rear Temp. Select Sw. Input/Output Counts Varies
Rec. Mode from Front Control Door Positions Heater, Panel, Defrost, Bi-level, Htr./Def. Varies
PCM Scan Tool Data List

Scan Tool Parameter Data List Units Displayed Typical Data Value
Operating Conditions: Engine idling, A/C ON, ambient air temperature between 22-27°C (70-80°F)
A/C High Side Pressure Engine Data 2 kPa, psi 629-845 kPa (85-120 psi)
A/C High Side Pressure Engine Data 2 Volts Varies
A/C Relay Command Engine Data 2 On, Off Varies
A/C Request Signal Engine Data 2 Yes, No Varies
ECT Sensor Engine Data 2 °C/°F 92°C (197°F)
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