On Board Diagnosis Logic

NOTE:

If DTC P1217 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC U1000, U1001. Refer to U1000, U1001 CAN COMM CIRCUIT .
If DTC P1217 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to U1010 CONTROL UNIT (CAN) .

If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will rise.

When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is indicated.

This self-diagnosis has the one trip detection logic.

DTC DETECTING CONDITION CHART

DTC No.	Trouble diagnosis name	DTC detecting condition	Possible cause
P1217 1217	Engine over temperature (Overheat)	Cooling fan does not operate properly (Overheat). Cooling fan system does not operate properly (Overheat). Engine coolant was not added to the system using the proper filling method. Engine coolant is not within the specified range.	Harness or connectors (The cooling fan circuit is open or shorted.) Cooling fan Cooling fan (crankshaft driven) IPDM E/R (Cooling fan relay) Radiator hose Radiator Radiator cap Reservoir tank Reservoir tank cap Water pump Thermostat For more information, refer to "MAIN 13 CAUSES OF OVERHEATING ".

CAUTION: When a malfunction is indicated, be sure to replace the coolant. Refer to "CHANGING ENGINE COOLANT ". Also, replace the engine oil. Refer to "CHANGING ENGINE OIL ".

Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Be sure to use coolant with the proper mixture ratio. Refer to ON-VEHICLE MAINTENANCE .
After refilling coolant, run engine to ensure that no water-flow noise is emitted.