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Pinpoint Test KF: Fan Control Relays: Introduction

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 State 

  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: Charge Air Cooler Cooling Fan Relay Connector
G06054163Courtesy of FORD MOTOR CO.
Vehicle Connector Pin Circuit
Ford GT A 5
1
3
2		 FANPWR
CACCF
B+
VPWR
All other vehicles A 5
2
3
1		 FANPWR
CACCF
B+
VPWR
Fig 2: Charge Air Cooler Cooling Fan Motor Connector
G11848499Courtesy of FORD MOTOR CO.
Pin Circuit
2 GND (Ground)
1 FANPWR (Fan Power)
Fig 3: Charge Air Cooler Cooling Fan 2 Motor Connector
G11848500Courtesy of FORD MOTOR CO.
Pin Circuit
2 GND (Ground)
1 FANPWR (Fan Power)
Fig 4: Cooling Fan Motor 1 Connector
G07432367Courtesy of FORD MOTOR CO.
Vehicle Connector Pin Circuit
EcoSport,
Fiesta,
KA		 A 1
2		 GND
FANPWR
All other vehicles A 2
1		 FC
FANPWR
Fig 5: Cooling Fan Motor 2 Connector
G07432367Courtesy of FORD MOTOR CO.
Pin Circuit
2 GND (Ground)
1 FANPWR (Fan Power)
Fig 6: Fan Control 1 (FC1) Relay Connector
G11848503Courtesy of FORD MOTOR CO.
Vehicle Connector Pin Circuit
Continental,
EcoSport,
Edge,
Expedition,
F-150,
Fiesta,
Flex,
Fusion,
KA,
MKT,
MKX,
MKZ,
Navigator		 A 5
2
3
1		 FANPWR
LFC
B+
VPWR
Escape/Kuga,
Focus,
MKC,
Transit		 B 5
2
3
1		 FANPWR
LFC
B+
VPWR
Explorer,
Mustang,
Taurus		 A 5
1
3
2		 FANPWR
LFC
B+
VPWR
Ford GT A 5
3
2		 FANPWR
B+
VPWR
Fig 7: Fan Control 2 (FC2) Relay Connector
G11848504Courtesy of FORD MOTOR CO.
Vehicle Connector Pin Circuit
Continental,
Edge,
F-150		 A 5
3
4
2
1		 GND
FC
FANPWR
HFC
VPWR
EcoSport,
Fiesta		 B 5
2
1		 FANPWR
HFC
VPWR
Escape/Kuga With 5 Fan Relays,
Focus With 5 Fan Relays,
MKC With 5 Fan Relays		 B 4
5
2
1, 3		 FANRSTR1
FANPWR
MFC
VPWR
Expedition,
Flex,
MKC With 3 Fan Relays,
MKT,
Navigator		 B 5
3
4
2
1		 GND
FC
FANPWR
HFC
VPWR
Explorer,
Fusion,
MKZ,
Mustang,
Taurus		 A 5
3
4
1
2		 GND
FC
FANPWR
HFC
VPWR
Ford GT A 1
5
2		 GND
FANPWR
VPWR
Transit B 4
3
2
1		 FC
FANPWR
HFC
VPWR
NOTE: The HFC circuit may be wired to the FC3 and FC5 relays. Refer to the Wiring Diagrams article for additional information.
Fig 8: Fan Control 3 (FC3) Relay Connector
G11848505Courtesy of FORD MOTOR CO.
Vehicle Connector Pin Circuit
Continental,
Edge,
Expedition,
F-150,
MKX,
Navigator		 A 5
2
3
1		 FANPWR
HFC
B+
VPWR
Escape/Kuga With 5 Fan Relays,
Focus With 5 Fan Relays,
MKC With 5 Fan Relays		 A 5
3
4
2
1		 GND
FC
FANPWR
HFC
VPWR
Explorer B 5
1
3
2		 FANPWR
HFC
B+
VPWR
Flex,
MKC With 3 Fan Relays,
MKT		 B 5
2
3
1		 FANPWR
HFC
B+
VPWR
Fusion,
MKZ		 A 3
2
5
1		 FANPWR
HFC
B+
VPWR
Mustang A 3
1
5
2		 FANPWR
HFC
B+
VPWR
Transit B 5
3
2
1		 GND
FC
HFC
VPWR
NOTE: The MFC circuit may be wired to the FC2 and FC4 relays. Refer to the Wiring Diagrams article for additional information.
Fig 9: Fan Control 4 (FC4) Relay Connector
G11848506Courtesy 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 10: Fan Control 5 (FC5) Relay Connector
G11848507Courtesy of FORD MOTOR CO.
Pin Circuit
2 HFC (High Fan Control)
3 B+ (Battery Positive Voltage)
1, 5 VPWR (Vehicle Power)

Powertrain Control Module (PCM) Connector 

For PCM connector views or reference values, refer to REFERENCE VALUES .

Vehicle Connector Pin Circuit
Continental 3.7L,
Edge 3.5L,
Explorer TiVCT 3.5L,
Explorer 3.7L,
F-150 TiVCT 3.5L,
F-150 5.0L,
Flex TiVCT 3.5L,
MKT 3.7L,
MKX 3.7L,
Mustang 3.7L,
Mustang 5.0L,
Mustang 5.2L,
Taurus TiVCT 3.5L,
Taurus 3.7L,
Transit 3.7L		 198 PIN B10
B17		 HFC
LFC
EcoSport 2.0L Manual Transmission,
EcoSport 1.6L		 80 PIN B41
B16		 HFC
LFC
EcoSport 2.0L Automatic Transmission 128 PIN B20
B36		 HFC
LFC
Escape/Kuga 1.5L 198 PIN B1
B2		 HFC
LFC
Escape/Kuga 2.0L,
Focus 2.3L,
MKC		 198 PIN B78
B4
B23		 MFC
HFC
LFC
F-150 GTDI 3.5L 198 PIN B80
B41
B43		 HFC
LFC
CACCF
Fiesta 1.6L 128 PIN B13 LFC
Fiesta 1.0L 198 PIN B3
B42		 HFC
LFC
Focus 1.0L 198 PIN B3 CACCF
Ford GT 198 PIN B78 CACCF
Fusion 2.5L 198 PIN B67
B66		 HFC
LFC
KA 128 PIN E31 LFC
All other vehicles 198 PIN B4
B23		 HFC
LFC
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