Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSPONTIAC2008GRAND PRIX BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 213 (HVAC SYSTEM - AUTOMATIC)DIAGNOSTIC INFORMATION AND PROCEDURESSCAN TOOL OUTPUT CONTROLS
2008 Pontiac Grand Prix Base
Scan Tool Output Controls
2008 Pontiac Grand Prix BaseSECTION Scan Tool Output Controls
WARNING: This page is about a different car, the 2007 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
HVAC Control Module Scan Tool Output Controls
| Scan Tool Output Control | Additional Menu Selection(s) | Description |
|---|---|---|
| A/C Request | Engine Output Controls | When commanded the scan tool displays Yes when requested On and No when not requested. |
| Air Inlet Door Position | Engine Output Controls | The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions. |
| Blower Motor Speed | Engine Output Controls | The scan tool displays Off or On selections. This function allows you to command the blower motor to its maximum or minimum speeds. |
| Driver Temp. Door | Engine Output Controls | The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions. |
| Mode Door Position | Engine Output Controls | The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions. |
| Passenger Temp. Door | Engine Output Controls | The scan tool displays On or Off selections. The selection drives the actuator to its minimum or maximum positions. |
| Recalibrate all Motors | Engine Output Controls | When commanded the scan tool displays the actuators counts moving between 0 and 255 counts. |
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 allows you to command the A/C compressor clutch relay ON and OFF. The state of the A/C compressor clutch should correspond to the state of the A/C compressor clutch relay. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.