Diagnostic Procedure

COOLING SYSTEM CONCERNS-RUNS COLD (SKYACTIV-G 2.5T) DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	DETERMINE IF MALFUNCTION CAUSE IS A/C SYSTEM OR ENGINE Is a customer complaint [Lack of passenger compartment heat] only?	Yes	Inspect the A/C system. Repair or replace the malfunctioning location and perform the repair completion verification 1.
1		No	Go to the next step.
2	VERIFY IDLE SPEED Does the engine speed continue at fast idle?	Yes	Perform the symptom troubleshooting [FAST IDLE/RUNS ON]. (See FAST IDLE/RUNS ON [SKYACTIV-G 2.5T] .)
2		No	Go to the next step.
3	VERIFY ECT SENSOR No. 1 FOR MALFUNCTION Inspect the applicable part. (Refer to ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-G 2.5T] in service information.) Is the part normal?	Yes	Go to the next step.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] in service information.)
4	INSPECT COOLING FAN CONTROL SYSTEM OPERATION Perform the cooling fan control system inspection. (Refer to COOLING FAN MOTOR INSPECTION [SKYACTIV-G 2.5T] in service information.) Does the cooling fan control system operate properly?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
5	VERIFY THERMOSTAT FOR MALFUNCTION Inspect the applicable part. (Refer to THERMOSTAT INSPECTION [SKYACTIV-G 2.5T] in service information.) Is the part normal?	Yes	Vehicles with active air shutter: Go to the next step. Vehicles without active air shutter: Perform the repair completion verification 1.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to THERMOSTAT REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] in service information.)
6	VERIFY ACTIVE AIR SHUTTER FOR MALFUNCTION Inspect the applicable part. (Refer to ACTIVE AIR SHUTTER INSPECTION in service information.) Is the part normal?	Yes	Go to the next step.
6		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to ACTIVE AIR SHUTTER REMOVAL/INSTALLATION in service information.)
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED Install/connect the part removed/disconnected during the troubleshooting procedure. Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. (Explain contents of repair 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. If the malfunction recurs, go to the next step.
Repair completion verification 2	VERIFY IF MALFUNCTION IS CAUSED BY NOT PERFORMING PCM REPROGRAMMING Verify repair information and verify that there is a new calibration in the PCM. Is there a new calibration in the PCM?	Yes	Perform the PCM reprogramming and verify if the malfunction symptom was corrected. If the malfunction recurs, replace the PCM. (Refer to PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] in service information.)
Repair completion verification 2		No	Replace the PCM. (Refer to PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] in service information.)