Scan Tool Data List

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 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)