Electric coolant fan, function
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Cooling system is equipped with 2 electric coolant fans:
- Coolant Fan V7 at left in direction of travel with Coolant Fan Control (FC) Control Module J293
- Coolant Fan 2 V177 at right in direction of travel with Coolant Fan Control (FC) Control Module 2 J671
Both fans are activated continuously via respective Coolant Fan Control (FC) Control Module.
- Terminal 66 of Engine Control Module (ECM) is the control output to Coolant Fan Control (FC) Control Module J293.
- Terminal 104 of Engine Control Module (ECM) is the control output to Coolant Fan Control (FC) Control Module 2 J671.
Coolant fans are activated by reason of the following criteria:
- Fan request from A/C system: A fan request is transmitted by A/C control head via CAN-Bus to Engine Control Module (ECM), it is sent directly to the fans.
- Normal engine operation: During normal driving operation and engine running at idle, fans are regulated by coolant temperature and ambient temperature.