GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1998 🢒 Firefly (Canada) 🢒 Engine 🢒 Engine Controls - 1.0L 🢒 HVAC Compressor Controls System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Start the engine.
  2. Move the blower speed selector switch to any position except the OFF position.
  3. Press the air conditioning (A/C) switch to the ON position.
    • The blower motor runs.
    • The A/C compressor clutch engages.
    • Cold air is delivered to the passenger compartment.
    • The A/C condenser fan motor runs.
    • The A/C compressor control module may cycle the A/C compressor clutch and the A/C condenser fan motor ON and OFF.

2

Turn the A/C switch to the OFF position.
    • The A/C compressor clutch disengages.
    • The A/C condenser fan motor stops running.

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.