Pinpoint Test E: Unable to Duplicate Customer Concern and No DTCs Present
Climate Control System
Pinpoint Test E: Unable to Duplicate Customer Concern and No DTCs Present
This pinpoint test is intended to diagnose the following:
- Incorrect functioning of the HVAC system
PINPOINT TEST E: UNABLE TO DUPLICATE CUSTOMER CONCERN AND NO DTCs PRESENT
NOTE: Diagnose any PCM, HVAC module or Air Conditioning Compressor Module (ACCM) DTCs before carrying out the following pinpoint test.
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E1 HVAC MODULE AND A/C COMPRESSOR SELF-TEST
NOTE: If sent to this pinpoint test from the HVAC Module and A/C Compressor Self-Test, GO to step E2.
- Carry out the HVAC Module and A/C Compressor Self-Test.
- Were all modes in the self-test achieved?
Yes
GO to E2.
No
Follow the actions within the HVAC Module and A/C Compressor Self-Test.
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E2 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 E3.
No
If the blower motor does not operate in any setting, GO to Pinpoint Test K. Pinpoint Test K: The Blower Motor is Inoperative
If the blower motor does not properly change speeds or shut OFF, GO to Pinpoint Test L. Pinpoint Test L: The Blower Motor Does Not Operate Correctly - DATC
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E3 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 E4.
No
REFER to Climate Control System - General Information and Diagnostics Climate Control System - General Information and Diagnostics and DIAGNOSE for incorrect/erratic direction of airflow from outlets.
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E4 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 E5.
No
If the temperature does not get very warm or heat is erratic, GO to Pinpoint Test H. Pinpoint Test H: Insufficient, Erratic or No Heat
If the temperature does not change at all, REFER to Climate Control System - General Information and Diagnostics Climate Control System - General Information and Diagnostics and DIAGNOSE for temperature control is inoperative/does not operate correctly.
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E5 VERIFY NO A/C COMPRESSOR OPERATION 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 E6.
No
If the temperature is warmer than ambient temperature, REFER to Climate Control System - General Information and Diagnostics Climate Control System - General Information and Diagnostics and DIAGNOSE for temperature control is inoperative/does not operate correctly.
If the outlet temperature is significantly colder than ambient temperature, GO to Pinpoint Test J. Pinpoint Test J: The Air Conditioning (A/C) is Always On
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E6 VERIFY A/C OPERATION 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 operate when the PANEL and A/C button (indicator ON) is pressed?
Yes
GO to E7.
No
GO to Pinpoint Test I. Pinpoint Test I: The Air Conditioning (A/C) is Inoperative
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E7 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
GO to E8.
No
GO to Pinpoint Test G. Pinpoint Test G: The Air Inlet Door is Inoperative
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E8 CHECK IN-VEHICLE TEMPERATURE/HUMIDITY SENSOR FAN OPERATION
- Make sure the ambient air temperature is above 2°C (35°F).
- Select PANEL mode.
- Press the A/C button (indicator ON).
- Place a piece of tissue within 25 mm (1 in) of the in-vehicle temperature/humidity sensor opening.
- Is the tissue drawn to the sensor opening?
Yes
GO to E9.
No
GO to Pinpoint Test F. Pinpoint Test F: Incorrect/Erratic Function in AUTO Mode
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E9 CHECK AUXILIARY COOLANT FLOW PUMP OPERATION
- Allow the vehicle to cool to ambient temperature.
- Start the engine and let the engine idle until it shuts down automatically,
- Select FLOOR mode.
- Set the temperature to the warmest setting.
- Select the highest blower motor setting.
- Does the discharge air temperature closely maintain its warm temperature for an extended period of time?
Yes
The system is operating normally.
If sent here for reduced airflow, CHECK the cabin air filter. If the cabin air filter is dirty, INSTALL a new cabin air filter. TEST the system for normal operation. If reduced airflow is still observed or the cabin air filter is clean,
GO to Pinpoint Test L. Pinpoint Test L: The Blower Motor Does Not Operate Correctly - DATC
No
GO to Pinpoint Test H. Pinpoint Test H: Insufficient, Erratic or No Heat
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