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ECM Scan Tool Output Controls
Scan Tool Output
Control
A/C Request
Scan Tool Data List - HVAC - Automatic
HVAC Control Module Scan Tool Data List
Scan Tool Parameter
Operating Conditions: Engine idling, A/C ON, ambient air temperature between 22-27°C (70-80°F)
A/C LED
A/C Head Pressure
A/C Permission
A/C Request
A/C Switch
Ambient Air Temperature
Air Inlet Door Actual
Air Inlet Door Commanded
Auxiliary Blower Motor PWM
Auxiliary LED
Auxiliary Mode Door Commanded
Auxiliary Mode Switch Position
Auxiliary Switch
Auxiliary Temp Door Motor Command
Battery Voltage
Blower Speed
Blower Motor Speed Command
Driver Heated Seat LED
Driver Heated Seat Status
Driver Heated Seat Switch
Engine Coolant Temp
Engine Running
Inside Air Temp Sensor
Left Hand A/C Duct Actual Temp
Left Hand A/C Duct Desired Temp
Left Hand Heater Duct Actual Temp
Left Hand Heater Duct Desired Temp
Left Temp Door Commanded
Left Sunload Sensor
Low Pressure Switch
Low Coolant Switch
Mode Switch Position
Mode Door Actual
Mode Door Commanded
Outside Air Temp Filtered
Outside Air LED
Outside Air Temp RAW
Outside Air Mode Switch
Passenger Heated Seat Status
Passenger Heated Seat Switch
Passenger Heated Seat LED
Rear Defrost LED
Rear Defrost Switch
The Enable Condition: Key On / Engine On
Additional Menu
Selections
The engine must be running and the ECM must receive an A/C
request from the HVAC control module in order to enable the output
Output Controls
control. The ECM de-energizes the A/C compressor clutch relay
when you select OFF. The relay remains de-energized until you
select ON.
System Data
A/C Permission Data
A/C Permission Data
A/C Permission Data
System Data
A/C Permission Data
Door Positions
Door Positions
System Data
System Data
Door Positions
Door Positions
A/C Permission
A/C Permission
System Data
System Data
System Data
A/C Permission
A/C Permission
Door Positions
System Data
System Data
Door Positions
Door Positions
System Data
System Data
System Data
System Data
Heating, Ventilation and Air Conditioning:
Data List
Units Displayed
Normal/Out of Range
Withheld/Granted
Inactive/Active
Normal/Out of Range
0 —255 Counts
0 —255 Counts
Inputs
Panel/Bilevel/Floor
Inputs
Inactive/Active
0 —255 Counts
Normal/Out of Range
Normal/Off
Off/Low/High
Inputs
Inactive/Active
Normal/Out of Range
Sensors
Sensors
Sensors
Sensors
Sensors
0-255 count
Sensors
Open/Close
Open/Close
Auto/Panel/Bi-Level/
Inputs
Floor/Defrost-Floor
0-255 Count
Sensors
Sensors
Inputs
Inactive/Active
Off/Low/High
Inputs
Inactive/Active
Inputs
Inactive/Active
Description
Typical Data Value
Off/On
Normal
No/Yes
Normal
Counts
%
Off/On
Normal
%
Off/On
Inactive
Normal
Yes/No
°C
°C
°C
°C
°C
Counts
Counts
°C
Off/On
°C
Inactive
Off/On
Off/On
Inactive
7A-25
Varies
Varies
Varies
Varies
Varies
Varies
Varies
Varies
Varies
Varies
Varies
Varies
Varies
Varies
Off
Off
Varies
Varies
Varies
Varies
Varies
Varies
Varies
Varies
Close
Close
Varies
Varies
Varies
Varies
Varies
Varies
Varies
Off
Off
Off
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Troubleshooting
