GM Service Manual Online
For 1990-2009 cars only
Table 1: HVAC Control Module Scan Tool Output Controls
Table 2: PCM Scan Tool Output Controls

HVAC Control Module Scan Tool Output Controls

Scan Tool Output Control

Additional Menu Selection(s)

Description

A/C Request

Engine Output Controls

When commanded the scan tool displays Yes when requested On and No when not requested.

Air Inlet Door Position

Engine Output Controls

The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions.

Blower Motor Speed

Engine Output Controls

The scan tool displays Off or On selections. This function allows you to command the blower motor to its maximum or minimum speeds.

Driver Temp. Door

Engine Output Controls

The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions.

Mode Door Position

Engine Output Controls

The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions.

Passenger Temp. Door

Engine Output Controls

The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions.

Recalibrate all Motors

Engine Output Controls

When commanded the scan tool displays the actuators counts moving between 0 and 255 counts.

PCM Scan Tool Output Controls

Scan Tool Output Control

Additional Menu Selection(s)

Description

A/C Relay

Engine Output Controls

The scan tool displays Commanded State: None, Off, or On. This function allows you to command the A/C compressor clutch relay ON and OFF. The state of the A/C compressor clutch should correspond to the state of the A/C compressor clutch relay.