Ford F150 Pickup. Instruction - part 1382

KOEO & KOER Self-Test Codes 

Record DTCs in order received. These DTCs indicate current faults in system and should be serviced in order of 
appearance. If KOEO or KOER DTCs are retrieved, see DIAGNOSTIC TROUBLE CODE DEFINITIONS 
in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article to identify appropriate system test to 
perform. 

Pass Codes 

SYSTEM PASS indicates no DTCs were recorded in that portion of test. If SYSTEM PASS is not retrieved in 
KOEO self-test, DTCs retrieved during KOER self-test may not be valid. 

AFCM Continuous Memory Self-Test Codes 

Continuous Memory self-test DTCs result from information stored by PCM during continuous self-test 
monitoring. Use these DTCs for diagnosis only when KOEO self-test and KOER self-test result in SYSTEM 
PASS and all steps under QUICK TEST are successfully completed. These DTCs indicate faults previously 
recorded. To retrieve AFCM Continuous Memory DTCs, see AFCM CONTINUOUS MEMORY SELF-
TEST . 

CLEARING DIAGNOSTIC TROUBLE CODES 

Alternate Fuel Control Module 

Perform the following:  

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Turn ignition off. Ensure proper memory (EPROM) card is inserted into NGS tester. Connect scan tool to 
Data Link Connector (DLC).  

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Turn ignition on or start engine if necessary.  

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Select VEHICLE & ENGINE SELECTION.  

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Select NEW VEHICLE YEAR & MODEL.  

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Select DIAGNOSTIC DATA LINK. 

TEST QA: UNABLE TO ACTIVATE SELF-TEST/SCP COMMUNICATION 
ERROR/DTC NOT LISTED under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, 
FLEX-FUEL & GASOLINE article.

NOTE:

KOER and KOEO self-tests cannot be performed in ALT fuel mode.

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

operating information from Keep-Alive Memory (KAM). To clear KAM, see 
RESETTING KEEP-ALIVE MEMORY (KAM) .

NOTE:

For compuvalve reset, see PROGRAMMING .

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Self-Diagnostics - Bi-Fuel - Gasoline/LPG

  

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Select AFCM - ALTERNATE FUEL CTRL MODULE. 

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Select DIAGNOSTIC TEST MODES.  

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Select RETRIEVE/CLEAR CONTINUOUS DTCs.  

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Select CLEAR.  

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Record DTCs and perform appropriate system test. See DIAGNOSTIC TROUBLE CODE 
DEFINITIONS . To disconnect scan tool, turn ignition off and disconnect scan tool from DLC and 
power supply.  

PCM Reset 

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

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All DTCs will be cleared from PCM memory.  

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All freeze frame data will be cleared from PCM memory.  

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Diagnostic monitoring results will be cleared from PCM memory.  

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OBD-II system monitor status will reset.  

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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 OBD-II 
DRIVE CYCLE. See DRIVE CYCLES .  

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

PCM Resetting Keep-Alive Memory (KAM) 

1. Resetting KAM will return PCM memory to its default setting. If not using a scan tool, disconnect 

negative battery terminal for a minimum for 5 minutes then go to next step. If using New Generation Star 
(NGS) tester, turn ignition switch to ON position. Select ACTIVE COMMAND MODES, then RESET 
KEEP ALIVE MEMORY. Go to next step.  

2. After KAM 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 with engine idling, transmission 
selector and A/C in specified position. See IDLE AIR TRIM LEARNING MODES table. 

IDLE AIR TRIM LEARNING MODES 

NOTE:

The AFCM supports some DTCs and PIDs which appear similar to PCM, 
but may have an entirely different meaning.

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

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

Transmission Gear Selector Position

A/C Mode

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Self-Diagnostics - Bi-Fuel - Gasoline/LPG

  

COMPONENT LOCATIONS 

Powertrain Control Module 

PCM is located on right rear of engine compartment. 

Alternate Fuel Control Module 

AFCM is incorporated within compuvalve, on top of engine. 

QUICK TEST 

Quick Test is divided into 3 specialized test procedures that are functional tests of EEC-V system. All self-tests 
are completely menu driven using New Generation Star (NGS) tester. The following procedures must be 
followed in sequence to avoid misdiagnosis:  

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VISUAL CHECK  

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VEHICLE PREPARATION & EQUIPMENT HOOKUP  

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Perform KOEO on-demand self-test. See KOEO ON-DEMAND SELF-TEST under QUICK TEST in 
SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.  

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Perform KOER on-demand self-test. See KOER ON-DEMAND SELF-TEST under QUICK TEST in 
SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.  

z

AFCM CONTINUOUS MEMORY SELF-TEST  

Complete QUICK TEST before performing any system tests. Record any DTCs retrieved. Service DTCs in the 
following order: KOEO DTCs, KOER DTCs and then Continuous Memory DTCs. After each service or repair 
procedure has been completed, always repeat QUICK TEST procedures to ensure all EEC-V systems are 
working properly and DTCs no longer exist. 

VISUAL CHECK 

Perform the following, and make all necessary repairs before continuing with QUICK TEST:  

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Inspect air cleaner and inlet ducts.  

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Check all engine vacuum hoses for damage, leaks, cracks, kinks and/or improper routing. 

Neutral

On

Neutral

Off

Drive

On

Drive

Off

NOTE:

If a fault is not indicated after performing QUICK TEST, vehicle may have a non-
electronic related failure. See SYMPTOM DIAGNOSIS under SYMPTOMS in 
TROUBLE SHOOTING - NO CODES - BI-FUEL - GASOLINE/LPG article.

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Self-Diagnostics - Bi-Fuel - Gasoline/LPG

  

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Inspect system wiring harness for proper connections, bent or broken pins, corrosion, loose wires and 
proper routing.  

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Check alternate fuel tank(s) for adequate CNG or LPG level.  

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Check PCM, sensors and actuators for physical damage.  

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Check AFCM for physical damage.  

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Ensure fuel filter is not installed backward (LPG only).  

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Check compuvalve, sensors and actuators for physical damage.  

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Check engine coolant for proper level and mixture.  

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Check transmission fluid level and quality.  

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Check inertia fuel shutoff switch set.  

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Ensure vehicle maintenance schedule has been followed.  

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Ensure vehicle battery is fully charged.  

VEHICLE PREPARATION & EQUIPMENT HOOKUP 

Apply parking brake, and place shift lever in Park (A/T) or Neutral (M/T) position. Block drive wheels. Turn 
off all electrical accessories. Ensure engine is at normal operating temperature. Connect appropriate test 
equipment to vehicle as follows. 

Generic Scan Tool 

Ensure scan tool meets or exceeds OBD-II standard. Follow scan tool manufacturer's operating instructions to 
hook up equipment and record DTCs. 

New Generation Star Tester 

Turn ignition off. Ensure proper memory (EPROM) card is inserted into New Generation Star (NGS) tester. 
Connect service connectors of adapter cable to vehicle Data Link Connector (DLC) and NGS tester. See Fig. 2 . 
Connect NGS tester power supply cable to power.

NOTE:

Vehicles equipped with Liquefied Petroleum Gas (LPG) fuel systems will only 
start in ALT fuel mode with Engine Coolant Temperature (ECT) temperatures 
greater than -13°F (-25°C). At temperatures less than this, LPG cannot vaporize. 
It may be necessary to bring vehicle to normal operating temperature in 
gasoline mode before restarting in ALT fuel mode.

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Self-Diagnostics - Bi-Fuel - Gasoline/LPG