Ford F150 Pickup. Instruction - part 1368

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Natural gas (and all other fuel vapors) can be harmful if inhaled.  

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All fuels can be harmful or fatal if swallowed.  

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All fuels are irritating to eyes and respiratory system.  

Handling 

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Be aware of Mercurous Mercaptan "Rotten egg" smell of natural gas.  

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Use flammable gas handling precautions.  

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Keep flammable gases in approved, labeled containers.  

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Use in well ventilated areas and control vapors. Be aware that natural gas is not visible, is lighter than air, 
can travel along the ceiling, and may collect in high hollows.  

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When transferring flammable gases, connect vent stack to source, and ground source to earth.  

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DO NOT smoke, or use heat/spark producing equipment near natural gas.  

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DO NOT eat, drink or smoke where fuels are handled, processed or stored.  

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Wash hands thoroughly after handling any fuel.  

Leakage 

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Notify proper authorities in event of any leakage you have not been trained to address.  

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Stop, and allow fuel to ventilate to outside atmosphere after any fuel escape.  

DRIVE CYCLE 

For gasoline engine related drive cycles, see DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL 
& GASOLINE article. 

OBD-II BI-FUEL DRIVE CYCLE DESCRIPTION 

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When a fault is detected for the first time the DTC is stored in the AFCM memory.  

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When the same fault is detected in two consecutive trips or if the fault is emission related, the PCM will 
illuminate the MIL. The PCM will cease MIL illumination if the fault condition no longer exists or when 
the vehicle is driven two times with no fault detected.  

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The PCM will also cease MIL illumination if the vehicle auto-switches to gasoline. The drive cycle is 
counted only when the recorded driving pattern is met. If another fault occurs while counting, the counter 
will reset.  

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The DTC can be displayed until the vehicle is driven 40 times. 

NOTE:

Rough road conditions may prevent certain steady state conditions and steady 
accelerations from validating the transmission and load related monitors. On 
models with Power Take-Off (PTO), disengage PTO system before performing 
drive cycle.

 

2003 Ford Pickup F150 

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

  

OBD-II BI-FUEL DRIVE CYCLE TRIP

A trip is defined as a key-on, key-off event in which the PCM and AFCM detect the following:  

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Engine coolant should exceed 160°F (71°C).  

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Engine coolant temperature should change more than 40°F (22°C) after starting the engine.  

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Engine speed should exceed 400 RPM.  

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Vehicle speed above 3 MPH.  

When the AFCM detects an emission related DTC, it uses the trip information to determine MIL light status. 

If a fault exists in the system being tested, a Diagnostic Trouble Code (DTC) will be stored in the AFCM 
memory. Depending on the type of fault detected, some DTCs will command immediate MIL illumination. 
Other faults will cause the AFCM to store the DTC in memory but not illuminate the MIL until the fault is 
detected again on a subsequent trip (2nd trip). 

SUMMARY 

If no DTC exists but driveability problem still exists, proceed to TROUBLE SHOOTING - NO CODES - BI-
FUEL - GASOLINE/CNG article for symptom diagnosis or intermittent diagnostic procedures. 

DIAGNOSTIC TROUBLE CODE DEFINITIONS 

DIAGNOSTIC TROUBLE CODE DEFINITIONS 

NOTE:

Prior to performing any system test, see HOW TO USE SYSTEM TESTS under 
SYSTEM TESTS. On some models, PCM is capable of storing some body DTCs. 
If any "B" DTCs are retrieved (example DTC B1213), see appropriate MODULE 
COMMUNICATIONS NETWORK article in ACCESSORIES & EQUIPMENT to 
determine test to perform.

NOTE:

If Powertrain Control Module (PCM) is replaced, new PCM must be programmed. 
See PROGRAMMING . If Alternate Fuel Control Module (AFCM) is replaced, 
perform AFCM reset procedure. For AFCM related DTC definitions, see 
DIAGNOSTIC TROUBLE CODE DEFINITIONS table. For PCM related DTC 
definitions, see DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-
DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.

DTC

Description

Go To Test

B1219

Fuel Tank Pressure Sensor Circuit Failure

(1)

B1220

Fuel Tank Pressure Sensor Circuit Short To Voltage

(1)

B1317

System Voltage High

(2)

B1318

System Voltage Low

(2)

P0182

Fuel Rail Temperature Sensor Circuit Low Input

DA

 

2003 Ford Pickup F150 

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

  

CONNECTOR IDENTIFICATION

P0183

Fuel Rail Temperature Sensor Circuit High Input

DA

P0192

Fuel Rail Pressure Sensor Circuit Low Input

DE

P0193

Fuel Rail Pressure Sensor Circuit High Input

DE

P0201-P0208

Injector Circuit Open

H

P0261

Injector No. 1 Circuit Low

H

P0262

Injector No. 1 Circuit High

H

P0264

Injector No. 2 Circuit Low

H

P0265

Injector No. 2 Circuit High

H

P0267

Injector No. 3 Circuit Low

H

P0268

Injector No. 3 Circuit High

H

P0270

Injector No. 4 Circuit Low

H

P0271

Injector No. 4 Circuit High

H

P0273

Injector No. 5 Circuit Low

H

P0274

Injector No. 5 Circuit High

H

P0276

Injector No. 6 Circuit Low

H

P0277

Injector No. 6 Circuit High

H

P0279

Injector No. 7 Circuit Low

H

P0280

Injector No. 7 Circuit High

H

P0282

Injector No. 8 Circuit Low

H

P0283

Injector No. 8 Circuit High

H

P0605

AFCM Read Only Memory Error

(3)

P0606

AFCM Internal Communication Error

(3)

P1261-P1268

Alternate Fuel Injector Circuit Low

H

P1271-P1278

Alternate Fuel Injector Circuit High

H

U0309 

(4)

Software Incompatibility With AFCM

(5)

U1011 

(4)

SCP Invalid Or Missing Data

U

U1260 

(4)

SCP Single Ended (+) Circuit Failure

UA

U1261 

(4)

SCP Single Ended (-) Circuit Failure

UA

U1262 

(4)

SCP Communication Bus Fault

UA

(1)

See appropriate ANALOG INSTRUMENT PANEL article in ACCESSORIES & EQUIPMENT.

(2)

See appropriate GENERATORS & REGULATORS article in ELECTRICAL.

(3)

Clear DTC and repeat QUICK TEST . If DTC resets, replace AFCM. See REMOVAL & 
INSTALLATION - F150 PICKUP - BI-FUEL - GASOLINE/CNG article.

(4)

All network DTCs listed are Continuous Memory DTCs.

(5)

AFCM identification code is incompatible with PCM. Verify correct AFCM vehicle application.

 

2003 Ford Pickup F150 

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

  

CONNECTOR VIEWS 

Fig. 2: Identifying AFCM Connector C1427 Terminals 
Courtesy of FORD MOTOR CO. 

NOTE:

For connector views referred to in diagnostic tests, and circuit functions, see 
Fig. 2 -Fig. 17 .

 

2003 Ford Pickup F150 

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