Ford F150 Pickup. Manual — part 1392
Fig. 33: Identifying PCM Connector Circuit Functions (3 Of 5)
Courtesy of FORD MOTOR CO.
2003 Ford Pickup F150
2003 ENGINE PERFORMANCE Self-Diagnostics - Bi-Fuel - Gasoline/LPG
Fig. 34: Identifying PCM Connector Circuit Functions (4 Of 5)
Courtesy of FORD MOTOR CO.
2003 Ford Pickup F150
2003 ENGINE PERFORMANCE Self-Diagnostics - Bi-Fuel - Gasoline/LPG
2003 Ford Pickup F150
2003 ENGINE PERFORMANCE Self-Diagnostics - Bi-Fuel - Gasoline/LPG
Fig. 35: Identifying PCM Connector Circuit Functions (5 Of 5)
Courtesy of FORD MOTOR CO.
CONNECTOR LOCATIONS
CONNECTOR LOCATIONS
SYSTEM TESTS
HOW TO USE SYSTEM TESTS
1. Ensure all non-EEC related faults found while performing basic diagnostic procedures in BASIC
DIAGNOSTIC PROCEDURES - TRUCKS - EXCEPT DIESEL article have been corrected. Follow
each test step in order until fault is found. DO NOT replace any part unless directed to do so. When more
than one code is retrieved, start with first code displayed.
2. System tests ensure electrical circuits are okay before sensors or other components are replaced. Always
test circuits for continuity between sensor and PCM. Test all circuits for short to power, opens or short to
ground. Voltage Reference (VREF) and Voltage Power (VPWR) circuits should be tested with ignition
on or as specified in system test.
3. If measuring voltage or resistance at PCM, always backprobe PCM connector. To identify PCM
Connector No./Terminal Count
Location
C133/42
Right Rear Side Of Engine Compartment
C139/16
Right Rear Side Of Engine Compartment
C406/8
Right Rear Side Of Engine Compartment
C410/10
Right Rear Side Of Engine Compartment
C421/10
Right Rear Side Of Engine Compartment
C422/10
Right Rear Side Of Engine Compartment
C431/2
Right Rear Side Of Engine Compartment
C432/8
Right Rear Side Of Engine Compartment
C463/4
Center Of Body, Near Fuel Tank
C495/3
Left Rear Side Of Engine Compartment
C1289/4
Left Rear Side Of Engine Compartment
C1294/64
Right Rear Side Of Engine Compartment
C1297/8
Right Rear Side Of Engine Compartment
C4001/2
Left Rear Side Of Engine Compartment
C4002/6
Left Rear Side Of Engine Compartment
C4013/3
Behind Right Side Instrument Panel
C4125/6
Underbody, Rear Of Vehicle
C4130/2
Underbody, Rear Of Vehicle
C4131/4
Underbody, Rear Of Vehicle
NOTE:
Alternate Fuel Control Module (AFCM) is part of compuvalve. Tank select relay
may also be referred to as LPG sender No. 2 relay.
2003 Ford Pickup F150
2003 ENGINE PERFORMANCE Self-Diagnostics - Bi-Fuel - Gasoline/LPG
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