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Home >> Chevrolet >> 2001 >> C 1500 Truck 2WD V6-4.3L VIN W >> Repair and Diagnosis >> Heating and Air Conditioning >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Testing - HVAC System - Automatic >> Scan Tool Data Definitions

Scan Tool Data Definitions

HVAC - Primary ECC Data - Outside Air Temp: The scan tool displays -40 to +60°C (-40 to +140°F). The output of the ambient air temperature sensor.

HVAC - Primary ECC Data - Inside Air Temp: The scan tool displays -40 to +60°C (-40 to +140°F). The output of the [1][2]inside air temperature sensor.

HVAC - Primary ECC Data - Upper Outlets Duct Temp: The scan tool displays -40 to +150°C (-40 to +300°F). The output of the upper outlets duct temperature sensor.

HVAC - Primary ECC Data - Lower Outlets Duct Temp: The scan tool displays -40 to +150°C (-40 to +300°F). The output of the lower outlets duct temperature sensor.

HVAC - Auxiliary ECC Data - Aux. Inside Air Temp: The scan tool displays -40 to +150°C (-40 to +300°F). The output of the Aux. [1][2]inside air temperature sensor.

HVAC - Auxiliary ECC Data - Aux. Upper Outlet Temp: The scan tool displays -40 to +150°C (-40 to +300°F). The output of the Aux. Upper Outlet temperature sensor.

HVAC - Auxiliary ECC Data - Aux. Lower Outlet Temp: The scan tool displays -40 to +150°C (-40 to +300°F). The output of the Aux. Lower Outlet temperature sensor.

HVAC - Primary ECC Data - Solar Sensor: The scan tool displays 0-250 counts. The solar load output of the sunload sensor.

HVAC - Primary ECC Data - Blower Motor PWM: The scan tool displays 0-98%.

HVAC - Auxiliary ECC Data -Auxiliary Blower Motor PWM: The scan tool displays 0-98%.

HVAC - Primary ECC Data - Mode Selection Position: The scan tool displays AUTO, Upper, Defog, Bi-Level, Heater or Defrost. The current operating mode of the HVAC system.

HVAC - Primary ECC Data - A/C Request: The scan tool displays Yes or No.

HVAC - Primary ECC Data - A/C LED On: The scan tool displays on or off.

HVAC - Primary ECC Data - Recirc LED: The scan tool displays on or off.

HVAC - Primary ECC Data - Outside Air LED: The scan tool displays on or off.

HVAC - Primary ECC Data - Rear Defog: The scan tool displays on or off.

HVAC - Primary ECC Data - Mode Door Actual: The scan tool displays 0-255 counts (0-5 volts). The signal output from the feedback pot on the actuator.

HVAC - Primary ECC Data - Mode Door Commanded: The scan tool displays 0-255 counts (0-5 volts). The desired position of the actuator.

HVAC - Auxiliary ECC Data - Aux. Mode Door Actual: The scan tool displays 0-255 counts (0-5 volts). The signal output from the feedback pot on the actuator.

HVAC - Auxiliary ECC Data - Aux. Mode Door Commanded: The scan tool displays 0-255 counts (0-5 volts). The desired position of the actuator.

HVAC - Primary ECC Data - Air Inlet Door Actual: The scan tool displays 0-255 counts (0-5 volts). The signal output from the feedback pot on the actuator.

HVAC - Primary ECC Data - Air Inlet Door Commanded: The scan tool displays 0-255 counts (0-5 volts). The desired position of the actuator.

HVAC - Primary ECC Data - Air Mix Door Actual: The scan tool displays 0-255 counts (0-5 volts). The signal output from the feedback pot on the actuator.

HVAC - Primary ECC Data - Air Mix Door Commanded: The scan tool displays 0-255 counts (0-5 volts). The desired position of the actuator.

HVAC - Auxiliary ECC Data - Aux. Air Mix Door Actual: The scan tool displays 0-255 counts (0-5 volts). The signal output from the feedback pot on the actuator.

HVAC - Auxiliary ECC Data - Aux. Air Mix Door Commanded: The scan tool displays 0-255 counts (0-5 volts). The desired position of the actuator.

HVAC - Miscellaneous Tests - Instant OAT Update: The scan tool displays Commanded State: None or On. Updates the ECC outside air temperature input to the current raw value.

HVAC - Miscellaneous Tests - Blower Motor: The scan tool displays Commanded State: None, Off or On. This function allows you to command the blower motor to its maximum (100%) or minimum (0%) speeds.

HVAC - Special Functions-Set Up New HVAC: This function has the ECC relearn a new heater and A/C control.

PCM - A/C Information - A/C Clutch (Actual): The scan tool displays On or Off. On is displayed when the PCM has energized the A/C clutch relay.

PCM - Engine Data 1 - ECT: The scan tool displays -40 to +215°C (-40 to +420°F). The output of the engine coolant temperature sensor.

PCM - Engine Data 2 - ECT: The scan tool displays -40 to +215°C (-40 to +420°F). The output of the engine coolant temperature sensor.

PCM - Engine Data 2 - Commanded A/C: The scan tool displays On or Off. On is displayed when the PCM has energized the A/C clutch relay.

PCM - Engine Data 2 - A/C High Side Pressure: The scan tool displays 0 to 5 volts. The output of the A/C pressure sensor.

PCM - Engine Data 2 - A/C Press. Out Of Range: The scan tool displays Yes or No. Yes is displayed when the system pressure exceeds 2968 kPa (430 psi).

PCM - Output Driver Data - A/C Relay: The scan tool displays OK or Fault. Fault is displayed when an open or short is detected in the A/C CLU relay ground circuit.

PCM - Engine Output Controls - A/C Relay: The scan tool displays Off or On selections. This command allows you to turn the A/C relay OFF and ON.
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