Ford F150 Pickup. Manual — part 1400

for diagnosis only when KOEO ON-DEMAND SELF-TEST and KOER ON-DEMAND SELF-TEST result in
SYSTEM PASS and all steps under QUICK TEST are successfully completed. These DTCs indicate faults
previously recorded. Fault may or may not be currently present. See DIAGNOSTIC TROUBLE CODE
DEFINITIONS.

CLEARING CODES

PCM Reset Procedure

After a PCM reset procedure has been performed, the following conditions will be met:

z

All DTCs will be cleared from PCM memory.

z

All freeze frame data will be cleared from PCM memory.

z

Diagnostic monitoring results will be cleared from PCM memory.

z

OBD-II system monitor status will reset.

z

DTC P1000 will be set in PCM memory until all OBD-II system monitors or components have been
tested to satisfy OBD-II drive cycle without any faults occurring. To clear DTC P1000, perform DRIVE
CYCLES. Ensure OBD-II DRIVE CYCLE is performed to verify repair.

To perform PCM reset using scan tool, follow scan tool manufacturer's operating manuals. If after clearing
DTCs a concern has not been corrected, or a fault is still present, a hard code will immediately be reset in PCM
memory.

Keep Alive Random Access Memory Reset Procedure

1. Resetting Keep Alive Random Access Memory (RAM) will return PCM memory to its default setting.

Adaptive learning contents such as idle and fuel trim are included. PCM reset procedure is part of keep
alive RAM reset. See PCM RESET PROCEDURE. If an error message is received or scan tool is
unable to perform keep alive RAM reset procedure, disconnect negative battery terminal for a minimum
for 5 minutes, then go to next step. If using Worldwide Diagnostic System (WDS) or New Generation
Star (NGS) scan tool, turn ignition switch to ON position. Select ACTIVE COMMAND MODES, then
select RESET KEEP ALIVE MEMORY. Go to next step.

2. After keep alive RAM has been reset, engine must idle for 15 minutes to learn new idle air trim values.

Idle quality will improve as strategy adapts. Adaptation occurs in 4 separate modes. See IDLE AIR
TRIM LEARNING MODES table.

CAUTION: DO NOT disconnect vehicle battery to clear DTCs. This will erase

operating information from keep alive RAM. To clear keep alive RAM,
perform KEEP ALIVE RANDOM ACCESS MEMORY RESET PROCEDURE.

CAUTION: When battery is disconnected, vehicle computer may lose memory data.

Driveability concerns may exist until computer systems have completed a
relearn cycle. See COMPUTER RELEARN PROCEDURES article in
GENERAL INFORMATION before disconnecting the battery.

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE Self-Diagnostics - CNG, Flex-Fuel & Gasoline

IDLE AIR TRIM LEARNING MODES

Transmission Gear Selector Position

A/C Mode

Neutral

On

Neutral

Off

Drive

On

Drive

Off

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE Self-Diagnostics - CNG, Flex-Fuel & Gasoline

POWERTRAIN CONTROL MODULE LOCATION

AVIATOR, BLACKWOOD, EXPLORER, F150 PICKUP & MOUNTAINEER

POWERTRAIN CONTROL MODULE LOCATION

CROWN VICTORIA, GRAND MARQUIS, MARAUDER & TOWN CAR

POWERTRAIN CONTROL MODULE LOCATION

ECONOLINE

POWERTRAIN CONTROL MODULE LOCATION

ESCAPE & RANGER

POWERTRAIN CONTROL MODULE LOCATION

EXCURSION & F250-550 SUPER-DUTY PICKUPS

POWERTRAIN CONTROL MODULE LOCATION

EXPEDITION, EXPLORER SPORT, EXPLORER SPORT TRAC & NAVIGATOR

POWERTRAIN CONTROL MODULE LOCATION

FOCUS & MUSTANG

POWERTRAIN CONTROL MODULE LOCATION

Application

Location

Aviator, Blackwood, Explorer, F150 Pickup & Mountaineer

Behind Right Kick Panel

Application

Location

Crown Victoria, Grand Marquis, Marauder & Town Car

Left Of Steering Column, On Firewall

Application

Location

Econoline

Left Rear Of Engine Compartment, Near Brake Master Cylinder

Application

Location

Escape & Ranger

Center Of Engine Compartment, Mounted On Cowl

Application

Location

Excursion & F250-550 Super-Duty Pickups

Behind Left Side Of Instrument Panel, Near Brake Pedal

Application

Location

Expedition, Explorer Sport, Explorer Sport Trac &
Navigator

Right Rear Of Engine Compartment, Mounted

On Cowl

Application

Location

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE Self-Diagnostics - CNG, Flex-Fuel & Gasoline

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE Self-Diagnostics - CNG, Flex-Fuel & Gasoline

LS & THUNDERBIRD

POWERTRAIN CONTROL MODULE LOCATION

SABLE, TAURUS & WINDSTAR

POWERTRAIN CONTROL MODULE LOCATION

ZX2

POWERTRAIN CONTROL MODULE LOCATION

Focus & Mustang

Behind Right Kick Panel

Application

Location

LS & Thunderbird

Under Right Side Of Dash, Mounted To Firewall

Application

Location

Sable, Taurus & Windstar

Right Rear Of Engine Compartment, Mounted On Cowl

Application

Location

ZX2

Center Of Instrument Panel, Below Center Console

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE Self-Diagnostics - CNG, Flex-Fuel & Gasoline