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PINPOINT TEST G : Climate Control System Functional Test

  1. G1 PERFORM A SELF-TEST ON THE PCM AND HVAC MODULE

    • Ignition ON.
    • Using a scan tool, perform PCM and HVAC module self-tests.

    Are any climate control related DTCs present? 

    Yes  For HVAC module DTCs, Refer to Climate Control System .For PCM DTCs, REFER to Electronic Engine Controls .
    No  GO to  G2.

  2. G2 CHECK THE BLOWER MOTOR OPERATION

    • Ignition ON.
    • Select panel mode.
    • Observe blower motor operation and select each blower motor speed.

    Does the blower motor operate in all selections and change speed in each? 

    Yes  GO to  G3.
    No  If the blower motor does not operate in any setting, GO to Pinpoint Test O .If the blower motor does not properly change speeds or shut off, GO to Pinpoint Test P .

  3. G3 CHECK AIRFLOW OPERATION

    • Select the highest blower motor setting.
    • While observing the airflow, select each of the airflow positions (panel, panel/floor, floor, floor/defrost, defrost).

    Is the airflow directed to the correct outlets? 

    Yes  GO to  G4.
    No  GO to Pinpoint Test I .

  4. G4 CHECK THE RECIRCULATION OPERATION

    • With the engine running, press the recirculation button (indicator off).
    • Select panel mode.
    • Select the highest blower motor setting.
    • Observe airflow noise.
    • Press the recirculation button (indicator on).

    Does the airflow noise increase when the recirculation mode is selected (indicator on)? 

    Yes  GO to  G5.
    No  GO to Pinpoint Test H .

  5. G5 VERIFY TEMPERATURE CONTROL OPERATION

    • Start the vehicle and allow it to reach normal operating temperature.
    • With the A/C off, select panel mode.
    • Change the temperature setting from the coldest to the warmest and back to the coldest.

    Does the temperature change between very warm to cool? 

    Yes  GO to  G6.
    No  If the temperature does not get significantly warmer, GO to Pinpoint Test J .If the temperature does not change significantly, GO to Pinpoint Test N .

  6. G6 VERIFY THE A/C CLUTCH DOES NOT ENGAGE WITH A/C OFF

    • With the engine running and the A/C off, select panel mode.
    • Select the coldest temperature setting.

    Is the outlet temperature close to ambient temperature? 

    Yes  GO to  G7.
    No  If the temperature is warmer than ambient temperature, GO to Pinpoint Test N .If the outlet temperature is significantly colder than ambient temperature and the A/C compressor clutch cycles normally, GO to Pinpoint Test M .If the outlet temperature is significantly colder than ambient temperature and the A/C compressor clutch is engaged and does not cycle, GO to Pinpoint Test L .

  7. G7 VERIFY A/C CLUTCH ENGAGEMENT IN THE A/C MODE

    • Make sure the ambient air temperature is above 2 °C (36 °F).
    • With the engine running, select panel mode.
    • Press the A/C button (indicator on).

    Does the A/C clutch engage when the panel and A/C button (indicator on) is pressed? 

    Yes  GO to  G8.
    No  GO to Pinpoint Test K .

  8. G8 CHECK FOR INSUFFICIENT COOLING

    • Change the temperature setting to coldest (MAX A/C).
    • Press the A/C button if the indicator is not on.

    Does the A/C compressor clutch engage and cycle on/off when the A/C indicator is on? 

    Yes  The system is operating correctly.
    No  Refer to Refrigerant System Tests .
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