NO.22 COOLING SYSTEM CONCERNS-OVERHEATING [SKYACTIV-D 1.5]

id0103q2898900

22	COOLING SYSTEM CONCERNS-OVERHEATING
DESCRIPTION	•  The engine coolant temperature is abnormally high.
POSSIBLE CAUSE	•  PCM DTC is stored. •  Erratic signal to PCM ―  ECT sensor or related circuit malfunction •  A/C relay malfunction •  Fan control module No.1 malfunction •  Fan control module No.2 malfunction •  Cooling system malfunction ―  Cooling fan motor malfunction ―  Coolant control valve malfunction ―  Engine coolant passage (including engine radiator) malfunction (clogging, leakage) ―  Active air shutter malfunction (with active air shutter)

Diagnostic Procedure

STEP	INSPECTION	RESULTS	ACTION
1	VERIFY PCM DTC •  Retrieve PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].) •  Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 1.5].)
		No	Go to the next step.
2	VERIFY CURRENT INPUT SIGNAL STATUS Caution •  While performing this step, always operate the vehicle in a safe and lawful manner. •  When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later. •  Access the following PID using the M-MDS: (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].) ―  ECT •  Does the PID indicate the correct value under the trouble condition? (See PCM INSPECTION [SKYACTIV-D 1.5].)	Yes	Inspect the related sensor and circuit. •  If there is any malfunction: ―  Repair or replace the malfunctioning part according to the inspection results, then go to Step 12. •  If there is no malfunction: ―  Go to the next step.
		No	Go to the next step.
3	INSPECT A/C RELAY •  Switch the ignition off. •  Remove the A/C relay. (See RELAY LOCATION.) •  Inspect the A/C relay. (See RELAY INSPECTION.) •  Is the A/C relay normal?	Yes	Go to the next step.
		No	Replace the A/C relay, then go to Step 12.
4	INSPECT FAN CONTROL MODULE NO.1 •  Inspect the fan control module No.1. (See FAN CONTROL MODULE INSPECTION [SKYACTIV-D 1.5].) •  Is the fan control module No.1 normal?	Yes	Go to the next step.
		No	Replace the fan control module No.1, then go to Step 12. (See COOLING FAN MOTOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
5	INSPECT FAN CONTROL MODULE NO.2 •  Inspect the fan control module No.2. (See FAN CONTROL MODULE INSPECTION [SKYACTIV-D 1.5].) •  Is the fan control module No.2 normal?	Yes	Go to the next step.
		No	Replace the fan control module No.2, then go to Step 12. (See COOLING FAN MOTOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
6	INSPECT COOLING FAN MOTOR NO.1 •  Inspect the cooling fan motor No.1. (See COOLING FAN MOTOR INSPECTION [SKYACTIV-D 1.5].) •  Is the cooling fan motor No.1 normal?	Yes	Go to the next step.
		No	Replace the cooling fan motor No.1, then go to Step 12. (See COOLING FAN MOTOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
7	INSPECT COOLING FAN MOTOR NO.2 •  Inspect the cooling fan motor No.2. (See COOLING FAN MOTOR INSPECTION [SKYACTIV-D 1.5].) •  Is the cooling fan motor No.2 normal?	Yes	Go to the next step.
		No	Replace the cooling fan motor No.2, then go to Step 12. (See COOLING FAN MOTOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
8	DETERMINE IF MALFUNCTION CAUSE IS COOLANT CONTROL VALVE OR OTHER •  Verify the engine radiator hose tension. Warning •  To prevent burns, use a cloth with your hand to verify the tension of the engine radiator hose. •  After the engine warms up, does the engine coolant circulate to the engine radiator hose?	Yes	Go to Step 10.
		No	Go to the next step.
9	INSPECT COOLANT CONTROL VALVE •  Inspect the coolant control valve. (See COOLANT CONTROL VALVE INSPECTION [SKYACTIV-D 1.5].) •  Is the coolant control valve normal?	Yes	Go to the next step.
		No	Replace the coolant control valve, then go to Step 12. (See COOLANT CONTROL VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
10	INSPECT SEALING OF ENGINE •  Verify that there is no engine coolant leakage. (See ENGINE COOLANT LEAKAGE INSPECTION [SKYACTIV-D 1.5].) •  Is the sealing of engine normal?	Yes	Inspect for clogging in the engine coolant passage. •  If there is any malfunction: ―  Repair or replace the malfunctioning part according to the inspection results, then go to Step 12. •  If there is no malfunction: ―  Go to the next step. (with active air shutter) ―  Go to Step 12. (without active air shutter)
		No	Repair or replace the malfunctioning part according to the inspection results, then go to Step 12.
11	INSPECT ACTIVE AIR SHUTTER FOR OPERATION MALFUNCTION •  Inspect the active air shutter. (See ACTIVE AIR SHUTTER INSPECTION.) •  Is there any malfunction?	Yes	Replace the active air shutter, then go to the next step. (See ACTIVE AIR SHUTTER REMOVAL/INSTALLATION.)
		No	Go to the next step.
12	Verify the test results. •  If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-D 1.5].) •  If a malfunction remains, inspect the related Service Information and perform the repair or diagnosis. ―  If the vehicle is repaired, troubleshooting is completed. ―  If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)