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