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Pinpoint Test KF: Fan Control Relays: Introduction: Notes

This pinpoint test is intended to diagnose the following:

Although the PCM output circuits are called LFC, MFC, and HFC, cooling fan operation is controlled by a combination of these outputs.

COOLING FAN REFERENCE

  PCM Output Low Speed Medium Speed High Speed
Vehicles With 5 Fan Control Relays LFC ON ON ON
  MFC OFF ON ON
  HFC OFF OFF ON
All others LFC ON N/A ON
  HFC OFF N/A ON
Fig 1: Identifying Charge Air Cooler Cooling Fan Relay Connector
G06054163Courtesy of FORD MOTOR CO.
Pin Circuit
5 FANPWR (Fan Power)
2 CACCF (Charge Air Cooler Cooling Fan)
3 B+ (Battery Positive Voltage)
1 VPWR (Vehicle Power)
Fig 2: Identifying Charge Air Cooler Cooling Fan Motor Connector
G07432367Courtesy of FORD MOTOR CO.
Pin Circuit
2 GND (Ground)
1 FANPWR (Fan Power)
Fig 3: Identifying Cooling Fan Motor 1 Connector
G07432367Courtesy of FORD MOTOR CO.
Vehicle Connector Pin Circuit
Fiesta A 1
2		 GND
FANPWR
All other vehicles A 2
1		 FC
FANPWR
Fig 4: Identifying Cooling Fan Motor 2 Connector
G07432367Courtesy of FORD MOTOR CO.
Pin Circuit
2 GND (Ground)
1 FANPWR (Fan Power)
Fig 5: Identifying Fan Control 1 (FC1) Relay Connector
G09957017Courtesy of FORD MOTOR CO.
Vehicle Connector Pin Circuit
Expedition,
Edge,
F-150,
Fiesta,
Flex,
Fusion,
MKT,
MKZ,
Navigator		 A 5
2
3
1		 FANPWR
LFC
B+
VPWR
Explorer,
MKS,
Mustang,
Taurus		 A 5
1
3
2		 FANPWR
LFC
B+
VPWR
MKC,
Transit		 B 5
2
3
1		 FANPWR
LFC
B+
VPWR
Fig 6: Identifying Fan Control 2 (FC2) Relay Connector
G09957018Courtesy of FORD MOTOR CO.
Vehicle Connector Pin Circuit
Explorer,
Fusion,
MKS,
MKZ,
Mustang,
Taurus		 A 5
4
3
1
2		 GND
FANPWR
FC
HFC
VPWR
Edge,
F-150		 A 5
4
3
2
1		 GND
FANPWR
FC
HFC
VPWR
Expedition,
Flex,
MKC With 3 Fan Relays,
MKT,
Navigator		 B 5
4
3
2
1		 GND
FANPWR
FC
HFC
VPWR
MKC With 5 Fan Relays B 4
5
2
1, 3		 FANRSTR1
FANPWR
MFC
VPWR
Transit B 3
4
2
1		 FANPWR
FC
HFC
VPWR
NOTE: The HFC circuit may be wired to the FC3 and FC5 relays. Refer to the service information for additional information.
Fig 7: Identifying Fan Control 3 (FC3) Relay Connector
G09957019Courtesy of FORD MOTOR CO.
Vehicle Connector Pin Circuit
Expedition,
Edge,
F-150,
Navigator		 A 5
2
3
1		 FANPWR
HFC
B+
VPWR
Explorer,
MKS		 B 5
1
3
2		 FANPWR
HFC
B+
VPWR
Fiesta,
Flex,
MKC With 3 Fan Relays,
MKT		 B 5
2
3
1		 FANPWR
HFC
B+
VPWR
Fusion,
MKZ		 C 3
2
5
1		 FANPWR
HFC
B+
VPWR
MKC With 5 Fan Relays A 5
3
4
2
1		 GND
FC
FANPWR
HFC
VPWR
Mustang A 3
1
5
2		 FANPWR
HFC
B+
VPWR
Transit B 5
3
2
1		 HFC
VPWR
GND
FC
NOTE: The MFC circuit may be wired to the FC2 and FC4 relays. Refer to the Wiring Diagrams service information for additional information.
Fig 8: Identifying Fan Control 4 (FC4) Relay Connector
G06054185Courtesy of FORD MOTOR CO.
Pin Circuit
5 FANPWR (Fan Power)
4 FANRSTR2 (Fan Resistor 2)
2 MFC (Medium Fan Control)
1, 3 VPWR (Vehicle Power)
Fig 9: Identifying Fan Control 5 (FC5) Relay Connector
G06054185Courtesy of FORD MOTOR CO.
Pin Circuit
2 HFC (High Fan Control)
3 B+ (Battery Positive Voltage)
1, 5 VPWR (Vehicle Power)
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