P1217

DTC P1217 ENGINE OVER TEMPERATURE

Description
If DTC P1217 is displayed with DTC P1119 or P1480, first perform the trouble diagnosis for DTC P1119 or P1480. Refer to "DTC P1119 RADIATOR COOLANT TEMPERATURE SENSOR" or "DTC P1480 COOLING FAN SPEED CONTROL SOLENOID VALVE".

System Description:

SYSTEM DESCRIPTION
This system controls the cooling fan operating speed. The opening of the cooling fan speed control solenoid valve changes to control oil pressure provided to the cooling fan drive pump.

This system consists of the cooling fan pump, cooling fan drive pump, cooling fan speed control solenoid valve, oil cooler, cooling fan fluid reservoir, etc.

The cooling fan pump is operated by engine with the drive belts and provides oil pressure to the cooling fan drive pump which operates the cooling fan. The cooling fan speed control solenoid valve is installed between the cooling fan pump and cooling fan drive pump. The solenoid valve repeats ON/OFF operation according to the signal sent from the ECM. The opening of the solenoid valve varies for optimum engine control. The optimum value stored in the ECM is determined by considering various engine conditions.

Cooling Fan Speed Control:

COOLING FAN SPEED CONTROL
The ECM controls the cooling fan speed corresponding to the engine speed, the radiator coolant temperature, refrigerant pressure, vehicle speed, air conditioner switch signal, etc.

The ECM determines the target fan speed based on the basic fan speed considering the radiator coolant temperature and the engine speed. The ECM controls fan speed between 0 to 2,550 rpm.

When the cooling fan speed control solenoid valve is malfunctioning (does not operate), the cooling fan is operated at the maximum speed by engine through the drive belts.

Cooling Fan Basic Speed Part 1:

Cooling Fan Basic Speed Part 2:

COMPONENT DESCRIPTION

Cooling Fan Speed Control Solenoid Valve
The cooling fan speed control solenoid valve uses a ON/OFF duty to control the pressure of the cooling fan fluid from the cooling fan pump. This solenoid valve is moved by ON/OFF pulse from the ECM. The longer the ON pulse is sent to the solenoid valve, the lower speed the cooling fan operates.

Consult-II Reference Value In Data Monitor Mode:

On Board Diagnosis Logic:

On Board Diagnosis Logic
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.

CAUTION:
When a malfunction is indicated, be sure to replace the coolant following the procedure in the "Changing Engine Coolant". Also, replace the engine oil.
1. 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 "Anti-Freeze Coolant Mixture Ratio".
2. After refilling coolant, run engine to ensure that no water-flow noise is emitted.

Overall Function Check
Use this procedure to check the overall function of the cooling fan. During this check, a DTC might not be confirmed.

WARNING: Never remove the radiator cap when the engine is hot. Serious burns could be caused by high pressure fluid escaping from the radiator.

Wrap a thick cloth around cap. Carefully remove the cap by turning it a quarter turn to allow built-up pressure to escape. Then turn the cap all the way off.

WITH CONSULT-II

4. Select "TARGET FAN RPM" in "ACTIVE TEST" mode with CONSULT-II.
5. Change "TRGT FAN RPM" indication by touching "UP" and "DOWN", then make sure that the cooling fan operating speed changes according to "TRGT FAN RPM" indication.
6. If the results are NG, go to "Diagnostic Procedure".

WITHOUT CONSULT-II

1. Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below the proper range, skip the following steps and go to "Diagnostic Procedure".
2. Confirm whether customer filled the coolant or not. If customer filled the coolant, skip the following steps and go to "Diagnostic Procedure".
3. Start engine.
Be careful not to overheat engine.
4. Make sure that the cooling fan operates. If not, go to "Diagnostic Procedure".
5. Turn ignition switch "OFF".
6. Disconnect radiator coolant temperature sensor harness connector.
7. Connect 2.2 kOhm resistor to engine coolant temperature sensor harness connector.

8. Restart engine and make sure that cooling fan operates at higher speed than the speed at step 4.
Be careful not to overheat engine.
9. If NG, go to "Diagnostic Procedure".