Pinpoint Test H: HVAC Functions Verification

Climate Control System

Pinpoint Test H: HVAC Functions Verification

This pinpoint test is intended to diagnose the following:

- Incorrect functioning of the HVAC system

PINPOINT TEST H : HVAC FUNCTIONS VERIFICATION

NOTE: Before carrying out the following test, diagnose any HVAC, PCM or Instrument Cluster (IC) DTCs.

H1 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 H2.

No
If the blower motor does not operate in any setting, GO to Pinpoint Test P. Pinpoint Test P: The Blower Motor is Inoperative

If the blower motor does not properly change speeds or shut OFF, GO to Pinpoint Test Q. Pinpoint Test Q: The Blower Motor Does Not Operate Correctly

H2 CHECK AIRFLOW OPERATION

- Select the highest blower motor setting.

- NOTE: Refer to Description and Operation for proper airflow descriptions.
While observing the airflow, select each of the airflow positions (PANEL, PANEL/FLOOR, FLOOR, FLOOR/DEFROST, DEFROST).


Is the airflow directed to the proper outlets?

Yes
GO to H3.

No
GO to Pinpoint Test J. Pinpoint Test J: Incorrect/Erratic Direction of Airflow From Outlets

H3
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 H4.

No
If the temperature does not get very warm, GO to Pinpoint Test K. Pinpoint Test K: Insufficient, Erratic or No Heat

If the temperature does not change at all, GO to Pinpoint Test O. Pinpoint Test O: Temperature Control is Inoperative/Does Not Operate Correctly

H4
VERIFY THE A/C CLUTCH DOES NOT ENGAGE WITH A/C OFF

- With the A/C OFF, select PANEL mode.

- Select the coldest temperature setting.

Is the outlet temperature close to ambient temperature?

Yes
GO to H5.

No
If the temperature is warmer than ambient temperature, GO to Pinpoint Test O and diagnose for inoperative blend door. Pinpoint Test O: Temperature Control is Inoperative/Does Not Operate Correctly

If the outlet temperature is significantly colder than ambient temperature and the A/C compressor clutch cycles normally, GO to Pinpoint Test N. Pinpoint Test N: The Air Conditioning (A/C) is Always On - A/C Mode Always Commanded ON

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 M. Pinpoint Test M: The Air Conditioning (A/C) is Always On - A/C Compressor Does Not Cycle

H5
VERIFY A/C CLUTCH ENGAGEMENT IN THE A/C MODE

- Make sure the ambient air temperature is above 2°C (35°F).

- 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 H6.

No
GO to Pinpoint Test L. Pinpoint Test L: The Air Conditioning (A/C) is Inoperative

H6 CHECK THE RECIRC OPERATION

- Press the RECIRC button (indicator OFF).

- Select PANEL mode.

- Select the highest blower motor setting.

- Observe airflow noise.

- Press the RECIRC button (indicator ON).

Does the airflow noise increase when the RECIRC mode is selected (indicator ON)?

Yes
The system is operating normally.

No
GO to Pinpoint Test I. Pinpoint Test I: The Air Inlet Door is Inoperative