Pinpoint Test I: Unable to Duplicate the Customer Concern and No DTCs Present
Climate Control System
Pinpoint Tests
Pinpoint Test I: Unable to Duplicate the Customer Concern and No DTCs Present
Normal Operation
This pinpoint test tests the functions of the HVAC system and identifies the correct HVAC symptom pinpoint test.
This pinpoint test is intended to diagnose the following:
- HVAC system and/or related components
PINPOINT TEST I: UNABLE TO DUPLICATE THE CUSTOMER CONCERN AND NO DTCs PRESENT
NOTE: Before carrying out the following test, diagnose any HVAC or PCM DTCs.
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I1 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 I2.
No
For Electronic Manual Temperature Control (EMTC), if the blower motor does not operate in any setting, GO to Pinpoint Test W. Pinpoint Test W: The Blower Motor is Inoperative - EMTC
For Dual Automatic Temperature Control (DATC), if the blower motor does not operate in any setting, GO to Pinpoint Test Y. Pinpoint Test Y: The Blower Motor is Inoperative - DATC
For EMTC, if the blower motor does not properly change speeds or shut OFF, GO to Pinpoint Test X. Pinpoint Test X: The Blower Motor Does Not Operate Correctly - EMTC
For DATC, if the blower motor does not properly change speeds or shut OFF, GO to Pinpoint Test Z. Pinpoint Test Z: The Blower Motor Does Not Operate Correctly - DATC
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I2 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 I3.
No
EMTC, GO to Pinpoint Test L. Pinpoint Test L: Incorrect/Erratic Direction of Airflow From Outlets - EMTC
DATC, GO to Pinpoint Test M. Pinpoint Test M: Incorrect/Erratic Direction of Airflow From Outlets - DATC
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I3 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 I4.
No
If the temperature does not get very warm, GO to Pinpoint Test N. Pinpoint Test N: Insufficient, Erratic or No Heat
For EMTC, if the temperature does not change at all, GO to Pinpoint Test R. Pinpoint Test R: Temperature Control is Inoperative/Does Not Operate Correctly - EMTC
For DATC, without navigation, if the LH temperature does not change at all, GO to Pinpoint Test S. Pinpoint Test S: Temperature Control is Inoperative/Does Not Operate Correctly - DATC, LH, Vehicles Without Navigation
For DATC, without navigation, if the RH temperature does not change at all, GO to Pinpoint Test T. Pinpoint Test T: Temperature Control is Inoperative/Does Not Operate Correctly - DATC, RH, Vehicles Without Navigation
For DATC, with navigation, if the LH temperature does not change at all, GO to Pinpoint Test U. Pinpoint Test U: Temperature Control is Inoperative/Does Not Operate Correctly - DATC, LH, Vehicles With Navigation
For DATC, with navigation, if the RH temperature does not change at all, GO to Pinpoint Test V. Pinpoint Test V: Temperature Control is Inoperative/Does Not Operate Correctly - DATC, RH, Vehicles With Navigation
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I4 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 I5.
No
For EMTC, if the temperature is warmer than ambient temperature, GO to Pinpoint Test R and diagnose for inoperative blend door. Pinpoint Test R: Temperature Control is Inoperative/Does Not Operate Correctly - EMTC
For DATC, without navigation, if the LH temperature is warmer than ambient temperature, GO to Pinpoint Test S and diagnose for an inoperative blend door. Pinpoint Test S: Temperature Control is Inoperative/Does Not Operate Correctly - DATC, LH, Vehicles Without Navigation
For DATC, without navigation, if the RH temperature is warmer than ambient temperature, GO to Pinpoint Test T and diagnose for an inoperative blend door. Pinpoint Test T: Temperature Control is Inoperative/Does Not Operate Correctly - DATC, RH, Vehicles Without Navigation
For DATC, with navigation, if the LH temperature is warmer than ambient temperature, GO to Pinpoint Test U and diagnose for an inoperative blend door. Pinpoint Test U: Temperature Control is Inoperative/Does Not Operate Correctly - DATC, LH, Vehicles With Navigation
For DATC, with navigation, if the RH temperature is warmer than ambient temperature, GO to Pinpoint Test V and diagnose for an inoperative blend door. Pinpoint Test V: Temperature Control is Inoperative/Does Not Operate Correctly - DATC, RH, Vehicles With Navigation
If the outlet temperature is significantly colder than ambient temperature and the A/C compressor clutch cycles normally, GO to Pinpoint Test Q. Pinpoint Test Q: 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 does not cycle, GO to Pinpoint Test P. Pinpoint Test P: The Air Conditioning (A/C) is Always On - A/C Compressor Does Not Cycle
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I5 VERIFY A/C CLUTCH ENGAGEMENT IN THE A/C MODE
- Make sure the ambient air temperature is above 2°C (35°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 I6.
No
GO to Pinpoint Test O. Pinpoint Test O: The Air Conditioning (A/C) is Inoperative
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I6 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
EMTC, GO to Pinpoint Test J. Pinpoint Test J: The Air Inlet Door is Inoperative - EMTC
DATC, GO to Pinpoint Test K. Pinpoint Test K: The Air Inlet Door is Inoperative - DATC
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