FAN CONTROL MODULE INSPECTION [SKYACTIV-G 2.5T]

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1.  Connect the M-MDS to the DLC-2.

2.  Start and warm up the engine.

3.  Monitor the engine coolant temperature with the M-MDS.

4.  Gradually increase the FAN_DUTY value from 0 to the maximum possible M-MDS operation value using the simulation function. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.5T)].)

•  Visually verify that the operation speed of the cooling fan conforms to the override drive.
•  To start the cooling fan from the stopped condition, approx. 5 s. are needed for start-up preparations before starting the cooling fan.

5.  Using the M-MDS, change the operation condition of the A/C while measuring the engine coolant temperature under the following conditions, and verify that the cooling fan operates correctly.

•  Because there is an intake air temperature decrease control setting, the cooling fan may operate when IAT sensor No.1 detects 60 °C {140 °F} or more according to conditions other than those mentioned.
•  Because there is an engine protection control setting, the cooling fan may operate when IAT sensor No.2 detects 70 °C {158 °F} or more according to conditions other than those mentioned.

Engine coolant temperature condition

Engine coolant temperature °C {°F}

Cooling fan operation status
less than 98 {208}
Off
more than 100 {212}
On

A/C conditions

Refrigerant pressure (MPa {kgf/cm2, psi})

Cooling fan operation status
less than 1.0 {10, 145}
Off
1.0—1.91 {10—19.5, 145—277}
On
more than 1.9 {19, 276}
On

6.  If normal operation cannot be verified in Steps 4 and 5, inspect the input signals of the following parts. Replace the cooling fan motor if all the following parts are normal.

•  ECT sensor
•  Refrigerant pressure sensor