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 scan tool displays Off or On selections. This function allows you to command the blower motor on at full speed or off.

Left Mix Motor

Miscellaneous Test

The scan tool displays Off or On selections. Selecting Off allows you to command the motor to its minimum (cold) position. Selecting On allows you to command the motor to its maximum (hot) position.

Right Mix Motor

Miscellaneous Test

The scan tool displays Off or On selections. Selecting Off allows you to command the motor to its minimum (hot) position. Selecting On allows you to command the motor to its maximum (cold) position.

PCM Scan Tool Output Controls

Scan Tool Output Control

Additional Menu Selection(s)

Description

A/C Relay

Engine Output Controls

The scan tool displays ON or OFF selections. This command allows you to turn the A/C relay On or Off for 5 seconds. When the A/C relay is commanded On, the A/C compressor clutch should be engaged.