GM Service Manual Online
For 1990-2009 cars only

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