Pinpoint Test KF: Fan Control Relays: Introduction: Notes

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2015 Lincoln Navigator, 2015 Lincoln MKZ, 2015 Lincoln MKX, 2015 Lincoln MKT, and 2015 Lincoln MKS. However, it is still accessible from the selected car via links, so may be relevant.

This pinpoint test is intended to diagnose the following:

CAC fan relay
fan control (FC1, FC2, FC3, FC4, FC5) relays
harness circuits: CACCF, LFC, MFC, HFC and VPWR
PCM (12A650)

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

Courtesy 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

Courtesy of FORD MOTOR CO.

Pin	Circuit
2	GND (Ground)
1	FANPWR (Fan Power)

Fig 3: Identifying Cooling Fan Motor 1 Connector

Courtesy 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

Courtesy of FORD MOTOR CO.

Pin	Circuit
2	GND (Ground)
1	FANPWR (Fan Power)

Fig 5: Identifying Fan Control 1 (FC1) Relay Connector

Courtesy 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

Courtesy 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

Courtesy 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

Courtesy 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

Courtesy of FORD MOTOR CO.

Pin	Circuit
2	HFC (High Fan Control)
3	B+ (Battery Positive Voltage)
1, 5	VPWR (Vehicle Power)