Diagnostic Procedure

NO WARM AIRFLOW FROM VENT DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	VERIFY DTCs Perform the DTC inspection for the following modules. (See DTC INSPECTION .) PCM Dash-electrical supply unit Are any DTCs displayed?	Yes	Repair or replace the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-G)] .) (See DTC TABLE [PCM (SKYACTIV-X)].) (See DTC TABLE [PCM (SKYACTIV-G 2.5T)] .) (See DTC TABLE [DASH_ESU] .)
1		No	Go to the next step.
2	VERIFY AIRFLOW CONDITION Switch the ignition ON (engine off or on) to operate the A/C. Does air flow from the vents after operating the blower motor?	Yes	Go to the next step.
2		No	Perform malfunction diagnosis according to [AMOUNT OF AIR BLOWN FROM VENTS DOES NOT CHANGE]. (See AMOUNT OF AIR BLOWN FROM VENTS DOES NOT CHANGE .)
3	VERIFY IF MALFUNCTION IS CAUSED BY ENGINE OVERCOOLING Access the PCM PID [ECT] using the M-MDS. (See PID/DATA MONITOR INSPECTION .) Warm up the engine while idling. Is the monitoring value 80°C {176°F} or more?	Yes	Go to the next step.
3		No	Perform malfunction diagnosis according to [COOLING SYSTEM CONCERNS-RUNS COLD]. (See COOLING SYSTEM CONCERNS-RUNS COLD [SKYACTIV-G] .) (See COOLING SYSTEM CONCERNS-RUNS COLD [SKYACTIV-G 2.5T] .)
4	VERIFY IF MALFUNCTION IS CAUSED BY LACK OF ENGINE COOLANT Inspect the engine coolant amount. (Refer to ENGINE COOLANT LEVEL INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION)] , or ENGINE COOLANT LEVEL INSPECTION [SKYACTIV-G 2.5T] in service information.) Is the engine coolant amount normal?	Yes	Repair or replace the heater core and perform the repair completion verification 1. (Refer to A/C UNIT DISASSEMBLY/ASSEMBLY in service information.)
4		No	Add engine coolant and verify that there is no leakage in the engine coolant passage. (Refer to ENGINE COOLANT REPLACEMENT [SKYACTIV-G (WITH CYLINDER DEACTIVATION)] , or ENGINE COOLANT REPLACEMENT [SKYACTIV-G 2.5T] in service information.) (Refer to ENGINE COOLANT LEAKAGE INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION)] , or ENGINE COOLANT LEAKAGE INSPECTION [SKYACTIV-G 2.5T] in service information.) Repair or replace the malfunctioning location and perform the repair completion verification 1.
Repair completion verification 1	VERIFY IF MALFUNCTION CAUSE IS CORRECTED Install/connect the part removed/disconnected during the troubleshooting procedure. Does warm air come out when the temperature is set to MAX HOT?	Yes	Troubleshooting completed. (Explain repair contents to customer.)
Repair completion verification 1		No	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See MALFUNCTION DIAGNOSIS FLOW [CONTROLLER AREA NETWORK (CAN)] .) If the CAN communication is normal, perform the diagnosis from Step 1.