Fan Control Module Inspection
NOTE:
- The fan control module cannot be removed as a single unit. If the fan control module is replaced, replace the cooling fan component.
- Connect the M-MDS to the DLC-2.
- Start and warm up the engine.
- 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.
- 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.
Fan control module No. 1, No. 2 [A/C OFF]
FAN CONTROL MODULE NO. 1, NO. 2 (A/C OFF)Engine coolant temperature °C {°F} Cooling fan operation status less than 98 {208} Off more than 100 {212} On - Verify that the PID FAN_DUTY value is a value other than 0 while measuring the vehicle speed under the following conditions using the M-MDS.
Fan control module No. 1, No. 2 [A/C ON]
FAN CONTROL MODULE NO. 1, NO. 2 (A/C ON)Vehicle speed (km/h {MPH}) PID FAN_DUTY [%] less than 85 {52} value other than 0 more than 85 {53} 0 - If normal operation cannot be verified in Steps 3, 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
- Battery