Ford F150 Pickup. Instruction - part 1628

Fig. 26: View Of Coil On Plug 
Courtesy of FORD MOTOR CO. 

Electric EGR Motor System 

For information on the Electric Exhaust Gas Recirculation (EEGR) system, see ELECTRIC EGR MOTOR 
SYSTEM under EGR SYSTEMS. 

EGR System Module 

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Theory & Operation - CNG, Flex-Fuel & Gasoline

  

For information on the EGR System Module (ESM), see EGR SYSTEM MODULE under EGR SYSTEMS.

EGR Vacuum Regulator Solenoid 

See EGR SYSTEMS . 

Electric Secondary Air Injection Pump 

See ELECTRIC SECONDARY AIR INJECTION SYSTEM under SECONDARY AIR INJECTION 
SYSTEM. 

Evaporative Emission Canister Purge Valve 

See FUEL EVAPORATIVE SYSTEM under EVAPORATIVE EMISSION SYSTEMS. 

Fan Control 

The PCM monitors certain parameters (such as engine coolant temperature, vehicle speed, A/C on/off status, 
A/C pressure, etc.) to determine engine cooling fan needs. 

For Variable Speed Electric Fan(s): The PCM controls the fan speed and operation using a duty cycle output 
on the Fan Control - Variable (FCV) circuit. The fan controller (located at or integral to the engine cooling fan 
assembly) receives the FCV command and operates the cooling fan at the speed requested (by varying the 
power applied to the fan motor). See Fig. 27 .

NOTE:

Evaporative Emission Canister Purge (CANP) Valve may also be referred to as 
Vapor Management Valve (VMV).

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Theory & Operation - CNG, Flex-Fuel & Gasoline

  

Fig. 27: Identifying FCV Command States 
Courtesy of FORD MOTOR CO. 

For Relay Controlled Fans: The PCM controls the fan operation through the Fan Control (FC) (single speed 
fan applications), Low Fan Control (LFC), Medium Fan Control (MFC) and/or High Fan Control (HFC) 
outputs. For three speed fans, although the PCM output circuits are called low, medium and high fan control 
(FC), cooling fan speed is controlled by a combination of these outputs. See Fig. 28 . 

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Theory & Operation - CNG, Flex-Fuel & Gasoline

  

Fig. 28: Identifying Cooling Fan Speed Output States 
Courtesy of FORD MOTOR CO. 

Fuel Cap Off Indicator Light 

FCIL is an output signal controlled by PCM and will illuminate when it is determined there is a failure in vapor 
management system due to fuel filler cap not being sealed properly. This would be detected by inability to pull 
vacuum in fuel tank, after a fueling event. 

Fuel Injectors 

See FUEL INJECTORS under FUEL CONTROL under FUEL SYSTEMS (GASOLINE), or NG FUEL 
INJECTORS under FUEL CONTROL under FUEL SYSTEMS (NATURAL GAS). 

Fuel Pump (Applications Using Fuel Pump Relay For Fuel Pump ON/OFF Control) 

Fuel Pump (FP) is a PCM output signal that is used to control electric fuel pump. With PCM power relay 
contacts closed, Vehicle Power (VPWR) is sent to coil of fuel pump relay. For electric fuel pump operation, 
PCM grounds FP circuit, which is connected to coil of fuel pump relay. This energizes coil and closes contacts 
of relay, sending Battery Voltage (B+) through FP PWR circuit to electric fuel pump. When ignition switch is 
turned to ON position, electric fuel pump runs for about one second, but is then turned off by PCM if engine 
rotation is not detected. For applications with 2-speed fuel pumps, a normally closed low speed fuel pump relay 

NOTE:

Escape, Expedition, LS, Mustang, Navigator, Thunderbird, Town Car and 
Windstar do not have a dedicated output wire from PCM to instrument cluster. 
PCM commands Fuel Cap Off Indicator Light (FCIL) on and off through 
Standard Corporate Protocol (SCP) BUS (+) and BUS (-) circuits.

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Theory & Operation - CNG, Flex-Fuel & Gasoline