P1217

System Description

COOLING FAN CONTROL
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant pressure and air conditioner ON signal. The control system has 3-step control [HIGH/LOW/OFF].

Operation:

CONSULT-II Reference Value in Data Monitor Mode
Specification data are reference values.

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.

Malfunction is detected when cooling fan does not operate properly (Overheat), cooling fan system does not operate properly (Overheat) and engine coolant was not added to the system using the proper filling method.

Possible Cause
- Harness or connectors
(The cooling fan circuit is open or shorted. )
- Cooling fan
- Radiator hose
- Radiator
- Radiator cap
- Water Pump
- Thermostat

For more information, refer to "MAIN 12 CAUSES OF OVERHEATING".

CAUTION:
When a malfunction is indicated, be sure to replace the coolant following the procedure ("Changing Engine Coolant", "ENGINE MAINTENANCE"). 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 ("Antifreeze Coolant Mixture Ratio", "RECOMMENDED FLUIDS AND LUBRICANTS").
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 1st trip 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
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" below.
2. Confirm whether customer filled the coolant or not. If customer filled the coolant, skip the following steps and go to "Diagnostic Procedure" below.
3. Turn ignition switch "ON".
4. Perform "COOLING FAN" in "ACTIVE TEST" mode with CONSULT-II.
5. If the results are NG, go to "Diagnostic Procedure" below.