GM Service Manual Online
For 1990-2009 cars only
Table 1: Heating and Air Conditioning Scan Tool Output Controls
Table 2: PCM Scan Tool Output Controls

Heating and Air Conditioning Scan Tool Output Controls

Scan Tool Output Control

Additional Menu Selection(s)

Description

Blower Motor

Miscellaneous Test

The HVAC control module commands the blower motor on to maximum speed when you select ON. The blower motor should operate at maximum speed until commanded OFF.

Left Mix Motor

Miscellaneous Test

The HVAC control module commands the left air temperature actuator towards 255 counts when you select ON. The HVAC control module commands the left air temperature actuator towards 0 counts when commanded OFF.

Right Mix Motor

Miscellaneous Test

The HVAC control module commands the right air temperature actuator towards 255 counts when you select ON. The HVAC control module commands the right air temperature actuator towards 0 counts when you select OFF.

PCM Scan Tool Output Controls

Scan Tool Output Control

Additional Menu Selection(s)

Description

A/C Relay

Engine Output Controls

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