After Blow Relay

Output Controls

The scan tool displays ON and OFF selections. This command allows you to turn the After Blow relay On or Off. When the A/C relay is commanded On, the A/C Compressor clutch should be engaged. After Blow is a dealer enabled option.

Rear Defog Relay Command

Data Display

The BCM commands the rear defog ON / OFF through the rear defog relay.

A/C Relay

Output Controls

The PCM/ECM grounds the A/C compressor clutch relay when you select ON. The A/C compressor clutch should remain engaged until commanded OFF.

A/C LED

Module and Display

Gives the status of the A/C compressor ON or OFF at the HVAC control head through the A/C LED indicator.

Ambient Air Temperature

HVAC System

The HVAC control module commands the ambient air temperature update. Offering also the command to immediately update the outside air temperature value on the scan tool.

Blower Motor Speed, Blower Motor Speed Command

Output Controls

The HVAC control module offers the ramp up of blower motor speeds. 0 percent equals OFF. With a value range of minimum value of 1 to maximum value of 100 percent.

Inside Air Temp Sensor

HVAC System

The HVAC control module commands the inside air temperature sensor aspirator fan ON and OFF.

Mode Door Position, Mode Door Motor Commanded

Actuator

The HVAC control module commands the mode door actuator towards 255 counts when you select ON and temp door motor commanded. The HVAC control module commands the air temperature actuator towards 0 counts when commanded OFF. The final resting position of the actuator is called out in temperature door position.

Outside Air LED

Module and Display

The HVAC control module shows the status of the outside air flow to the passenger compartment. The status commanded ON shows fresh air is entering the passenger compartment. The OFF mode represents the cut off of fresh air entering the compartment or the introduction of the recirculated air status.

Rear Defog LED

Module and Display

The HVAC control module commands the rear defogger ON through the defogger switch. The Defogger LED will verify the ON / OFF status of the switch. Both rear defogger switch and LED are located on the HVAC control module.

Recirculation Door Position, Recirculation Door Motor Commanded

Actuator

The HVAC control module commands the recirculation actuator towards 255 counts when you select ON and recirc door motor commanded. The HVAC control module commands the recirc actuator towards 0 counts when commanded OFF. The final resting position of the actuator is called out in recirc door position.

Recirculation LED

Module and Display

The HVAC control module shows the LED status of the recirculation of air flow in the passenger compartment. The status commanded ON shows recirculated air is the only air in the passenger compartment. The OFF mode represents the cut off of recirculated air or the introduction of fresh air into the compartment.

Temperature Door Position, Temperature Door Motor Commanded

Actuator

The HVAC control module commands the air temperature actuator towards 255 counts when you select ON and temp door motor command. The HVAC control module commands the air temperature actuator towards 0 counts when commanded OFF. The final resting position of the actuator is called out in temperature door position.

A/C Relay Command

Engine Output Controls

The scan tool displays ON or OFF selections. This command allows you to turn the A/C relay On or Off. When the A/C relay is commanded On, the A/C compressor clutch should be engaged.