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

Heating and Air Conditioning Scan Tool Output Controls

Scan Tool Output Control

Additional Menu Selection(s)

Description

A/C Defrost Solenoid

Solenoid Test

The scan tool displays On or Off selections. This function allows you to command the A/C defrost solenoid ON or OFF for 5 seconds.

Air Down Solenoid

Solenoid Test

The scan tool displays On or Off selections. This function allows you to command the air down solenoid ON or OFF for 5 seconds.

AIR Up Solenoid

Solenoid Test

The scan tool displays On or Off selections. This function allows you to command the AIR up solenoid ON or OFF for 5 seconds.

Blower Motor

Miscellaneous Test

The scan tool displays On or Off selections. This function allows you to command the blower motor ON at full speed, or OFF, for 5 seconds.

Instant OAT Update

Miscellaneous Test

The scan tool displays Off or On selections. This function updates the HVAC control processor ambient air temperature sensor input to the current raw value.

Lower Motor

Miscellaneous Test

The scan tool displays On or Off selections. This function allows you to command the lower motor ON or OFF for 5 seconds.

Park Brake Release

Miscellaneous Test

The scan tool displays On or Off selections. This function allows you to command the park brake release solenoid ON or OFF for 5 seconds.

Recirculation Solenoid

Solenoid Test

The scan tool displays On or Off selections. This function allows you to command the recirculation solenoid ON or OFF for 5 seconds.

Upper Motor

Miscellaneous Test

The scan tool displays On or Off selections. This function allows you to command the upper motor ON or OFF for 5 seconds.

Powertrain Control Module (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 function allows you to command the A/C compressor clutch relay ON for 5 seconds, or OFF. When the A/C compressor clutch relay is ON, the A/C compressor clutch should be engaged.