NO WARM AIRFLOW FROM VENT [FULL-AUTO AIR CONDITIONER]
id0703c1703400
Malfunction symptom |
No warm airflow from vent |
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Description
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• No warm airflow even if airflow temperature setting is MAX HOT
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Possible cause
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• Blower motor malfunction
• Engine is overcooling
• Malfunction due to engine coolant leakage
• Heater core malfunction
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Diagnostic Procedure
Step |
Inspection |
Action |
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1
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VERIFY DTCs
• Perform the DTC inspection for the following modules.
(See DTC INSPECTION.)
• Is a DTC displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-D)].)
(See DTC TABLE [PCM (SKYACTIV-X)].)
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No
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Go to the next step.
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2
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VERIFY AIRFLOW CONDITION
• Switch the ignition ON (engine off or on).
• Turn the airflow volume control switch on.
• Does air flow from the vents after operating the blower motor?
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Yes
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Go to the next step.
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No
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Go to the following malfunction symptom item.
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3
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VERIFY IF MALFUNCTION IS CAUSED BY ENGINE OVERCOOLING
• Using the M-MDS, display the PCM PID [ECT].
(See PID/DATA MONITOR INSPECTION.)
• Switch the ignition ON (engine off or on) and warm up the engine while idling.
• Is the monitor value 80°C or more?
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Yes
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Go to the next step.
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No
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Go to the following malfunction symptom item.
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4
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VERIFY IF MALFUNCTION IS CAUSED BY LACK OF ENGINE COOLANT
• Inspect the engine coolant amount.
• Is the engine coolant amount normal?
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Yes
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Repair or replace the heater core and go to the repair completion verification.
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No
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Add engine coolant and verify that there is no leakage in the engine coolant passage.
• If there is any malfunction
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Repair completion verification
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VERIFY THAT MALFUNCTION DOES NOT RECUR AFTER REPAIRS
• Does warm air flow when the airflow temperature setting is MAX HOT?
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Yes
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Troubleshooting completed. (Explain repair contents to the customer)
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No
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Refer to the CAN (controller area network) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
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