GM Service Manual Online
For 1990-2009 cars only
Table 1: Auxiliary HVAC Control Assembly Scan Tool Output Controls
Table 2: DIM Scan Tool Output Controls
Table 3: IPC Scan Tool Output Controls
Table 4: IPM Scan Tool Output Controls
Table 5: PCM Scan Tool Output Controls

Auxiliary HVAC Control Assembly Scan Tool Output Controls

Scan Tool Output Control

Additional Menu Selections

Description

Displays Test

Output Control

The scan tool displays Off or On selections. When you select On, all segments of the HVAC control module (IPM), IPC, and auxiliary HVAC control assembly should illuminate for 5 seconds, and all gages should sweep through their full range of motion. When you select Off, all segments of the IPM, IPC, and auxiliary HVAC control assembly should be blank, and all gages should be at zero for 5 seconds.

Fan High

Output Control

The scan tool displays On or Off selections. This function allows you to command the auxiliary blower motor ON or OFF at low speed.

Fan Low

Output Control

The scan tool displays On or Off selections. This function allows you to command the auxiliary blower motor ON or OFF at medium high speed.

Fan Medium

Output Control

The scan tool displays On or Off selections. This function allows you to command the auxiliary blower motor ON or OFF at medium speed.

Fan Medium High

Output Control

The scan tool displays On or Off selections. This function allows you to command the auxiliary blower motor ON or OFF at high speed.

Mode Door Position

Output Control

The scan tool displays On or Off selections. This function allows you to command the auxiliary mode actuator to its minimum or position for 5 Seconds, or its maximum position for 20 Seconds.

Segment Check

Output Control

The scan tool displays On or Off selections. This function allows you to command all segments of the auxiliary HVAC control assembly ON for 20 Seconds, or OFF for 5 Seconds.

DIM Scan Tool Output Controls

Scan Tool Output Control

Additional Menu Selections

Description

In Car Temp Sensor

Output Control

The scan tool displays On or Off Selections. This function allows you to turn the air intake fan for the inside air temperature assembly ON or OFF for 5 Seconds.

IPC Scan Tool Output Controls

Scan Tool Output Control

Additional Menu Selections

Description

Displays Test

Output Control

The scan tool displays Off or On selections. When you select On, all segments of the HVAC control module (IPM) IPC, and auxiliary HVAC control assembly should illuminate for 5 seconds, and all gages should sweep through their full range of motion. When you select Off, all segments of the IPM, IPC, and auxiliary HVAC control assembly should be blank, and all gages should be at zero for 5 seconds.

IPM Scan Tool Output Controls

Scan Tool Output Control

Additional Menu Selections

Description

Afterblow

Set Options

Allows the blower motor to run after the ignition is turned OFF.

Air Inlet Door Position

HVAC Motors

The scan tool displays Outside or Recirc selections. This function drives the actuator to its minimum (outside air) or maximum (recirculate) stops for 20 seconds.

Blower Motor

Miscellaneous Test

The scan tool displays Off or On selections. This function allows you to command the blower motor to its maximum (100%) or minimum (0%) speeds for 5 seconds.

Displays Test

Miscellaneous Test

The scan tool displays Off or On selections. When you select ON, all segments of the HVAC Control Module, (IPM) IPC, and auxiliary HVAC control assembly should illuminate for 5 seconds, and all gages should sweep through their full range of motion. When you select OFF, all segments of the IPM, IPC, and auxiliary HVAC control assembly should be blank, and all gages should be at zero for 5 seconds.

Htr./Def./A/C Door Position

HVAC Motors

The scan tool displays Upper or Defrost selections. This function drives the actuator to its minimum (defrost) or maximum (upper) positions for 20 seconds.

Instant OAT Update

Miscellaneous Test

The scan tool displays Commanded State: None or On. This function updates the IPM outside air temperature input to the current raw value.

Left Temp Door Position

HVAC Motors

The scan tool displays Hot or Cold selections. The selection drives the actuator to its minimum (cold) or maximum (hot) positions for 20 seconds.

Recalibrate All Motors

Miscellaneous Test

The scan tool displays Commanded State: None or On. This functions commands all actuators to their fully opened and fully closed positions, and relearns these endpoints.

Right Temp Door Position

HVAC Motors

The scan tool displays Hot or Cold selections. The selection drives the actuator to its minimum (hot) or maximum (cold) positions for 20 seconds.

Temperature Offset

Set Options

Allows for variation between driver set temperature and target (desired) system discharge temperature.

PCM Scan Tool Output Controls

Scan Tool Output Control

Additional Menu Selections

Description

A/C Relay

Engine Output Controls

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