Ford F150 Pickup. Instruction - part 1546

continue diagnosis as directed. If voltage at PDJB FP PWR pin is not greater than 10.5 volts when the 
outputs are commanded on, fuel pump relay contacts are always open, or there is an open circuit in PDJB 
between B+ supply and FPM splice. Replace FP relay/PDJB. 

110) For Continuous Memory Only DTC P0230 (Applications With FP Relay Soldered On PDJB 
Circuit Board): Check Fuel Pump Primary Circuits 
 
DTC P0230 is set when FP output is commanded ON (grounded) and excessive current draw is detected 
on FP circuit; or when FP output is commanded OFF, voltage is not detected on FP circuit (PCM expects 
VPWR voltage on FP circuit to fuel pump relay coil). Possible causes are: 

z

Open or shorted Fuel Pump (FP) circuit.  

z

Open VPWR circuit to fuel pump relay.  

z

Faulty fuel pump relay.  

z

Faulty PCM.  

Turn ignition switch to ON position. Wait 5 seconds. Using scan tool, access FPF PID. The FPF PID will 
indicate no fault (or NO), indicating that the PCM detects VPWR voltage through the fuel pump relay 
coil and FP circuit. Observe the FPF PID for an indication of a fault while completing the following (the 
FPF PID will indicate a fault (or YES), when an open is detected). Shake, wiggle, bend the FP circuit 
between the PCM and the PDJB. Lightly tap the fuel pump relay/PDJB (to simulate road shock). Turn 
ignition switch to OFF position. Inspect the PCM and applicable PDJB connectors for corrosion, 
damaged pins. If a fault indicated, isolate fault and repair as necessary. If a fault is not indicated, unable 
to duplicate or identify fault at this time. Go to TEST Z, step 1). 

115) For Continuous Memory Only DTC P0231 (Applications With FP Relay Soldered On PDJB 
Circuit Board): Check Fuel Pump Secondary Circuits In PDJB 
 
DTC P0231 indicates PCM commanded fuel pump ON and B+ voltage is not detected on Fuel Pump 
Monitor (FPM) circuit. Possible causes are: 

z

Open B+ circuit to fuel pump relay.  

z

Open FP PWR circuit between fuel pump relay and connection to FPM Circuit.  

z

Faulty fuel pump relay.  

z

Faulty PCM (Engine will start).  

z

On F150 Lightning 5.4L SC, faulty Inertia Fuel Shutoff (IFS) switch, IFS switch relay, or concern 
with related wiring.  

Turn ignition switch to OFF position. Disconnect PDJB connector that contains the FP PWR circuit 
(connector L4 for Expedition and Navigator, or connector "A" for F-Series and Excursion). Connect 

NOTE:

A break in step numbering sequence occurs at this point. Procedure skips 
from step 107) to step 110). No test procedures have been omitted.

NOTE:

A break in step numbering sequence occurs at this point. Procedure skips 
from step 110) to step 115). No test procedures have been omitted.

 

2003 Ford Pickup F150 

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

  

DVOM (or non powered test light) between FP PWR circuit pin of PDJB and ground. Turn ignition 
switch to ON position. Using scan tool, access Output Test Mode on scan tool. Command outputs on. 
Observe DVOM/test light for an indication of a fault while performing the following (voltage will drop 
suddenly when a fault is detected). Be aware that Output Test Mode will turn off the fuel pump after a 
calibrated time. If this happens, again command the outputs on to continue testing. Lightly shake, wiggle 
the fuel pump fuse (to simulate road shock). Lightly tap the fuel pump relay/PDJB (to simulate road 
shock). If a fault indicated, isolate fault and repair as necessary. If a fault is not indicated, unable to 
duplicate or identify fault at this time. Go to TEST Z, step 1). 

120) For Continuous Memory Only DTC P0232: Check Fuel Pump Secondary Circuits 
 
If Continuous Memory DTC P0230 is also present, go to step 

110)

. Be aware that P0232 could be set if 

the IFS switch was tripped then reset, or if power was supplied to the FP PWR circuit when the PCM 
expected the fuel pump to be off (i.e. fuel pump prime procedure). DTC P0232 indicates that PCM 
detected high FPM circuit voltage when fuel pump was commanded OFF. Possible causes are: 

z

Inertia Fuel Shutoff (IFS) switch open or not reset.  

z

Open circuit between fuel pump and FPM connection to FP PWR circuit.  

z

Poor fuel pump ground.  

z

Fuel pump internally open.  

z

Fuel pump secondary circuits shorted to PWR.  

z

Fuel pump relay contacts always closed.  

z

Open FPM circuit between PCM and connection to FP PWR circuit.  

z

Faulty low speed fuel pump relay or related circuits (F150 Lightning 5.4L SC).  

z

Faulty PCM (Engine will start).  

Turn ignition switch to ON position. Using scan tool, access FPM PID. Observe the FPM PID for an 
indication of a fault while completing the following (the FPM PID will turn ON when an open or short to 
power is detected): Shake, wiggle, bend the FP PWR circuit between the FP PWR pin at the PDJB and 
the fuel pump. Shake, wiggle, bend the fuel pump ground circuit from the fuel pump to ground. Shake, 
wiggle, bend the FPM circuit between the PDJB and the PCM. Lightly tap the fuel pump, inertia fuel 
shutoff switch and fuel pump relay/PDJB to simulate road shock. Turn ignition switch to OFF position. If 
a fault was indicated/found, isolate fault and repair as necessary. If a fault was not indicated/found, 
unable to duplicate or identify fault at this time. Go to TEST Z, step 1). 

TEST KB: FUEL PUMP DRIVER MODULE 

Diagnostic Aids 

NOTE:

A break in step numbering sequence occurs at this point. Procedure skips 
from step 115) to step 120). No test procedures have been omitted.

NOTE:

After each service or repair procedure has been completed, reconnect all 
components. Clear DTCs and repeat QUICK TEST procedures to ensure all EEC-
V systems are working properly and DTCs are no longer present.

 

2003 Ford Pickup F150 

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

  

Perform this test when instructed during QUICK TEST or if directed by other test procedures. This test is used 
to diagnose the following:  

z

Wiring Harness Circuits (B+, GND & VPWR To Fuel Pump Relay; FP, FPM, FP PWR, FP RTN & 
FPDM PWR). See Fig. 308-Fig. 312 .  

z

Faulty Inertia Fuel Shutoff (IFS) Switch  

z

Faulty Fuel Pump Driver Module (FPDM)  

z

Faulty Power Supply Relay Inside Constant Control Relay Module (CCRM)  

z

Faulty Powertrain Control Module (PCM)  

Fig. 308: Identifying Fuel Pump Driver Module Circuits & Connector Terminals (Aviator) 
Courtesy of FORD MOTOR CO. 

 

2003 Ford Pickup F150 

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

  

Fig. 309: Identifying Fuel Pump Driver Module Circuits & Connector Terminals (Focus, Crown Victoria, 
Grand Marquis, Sable, Taurus & Town Car)

 

2003 Ford Pickup F150 

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