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Terminator Talk
Check Engine Light -Please HELP- Code P1233 FPDM
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<blockquote data-quote="FlaSeaDude" data-source="post: 8978491" data-attributes="member: 34498"><p>I don't know if there is a relay for the stock fuel system. I checked on my Ford Service Information CD and and found the following information:</p><p></p><p>Code: P1233 - Fuel System Disabled or Offline </p><p></p><p>Description: The PCM monitors the fuel pump monitor (FPM) circuit from the fuel pump driver module (FPDM). With the key on, the FPDM continuously sends a duty cycle signal to the PCM through the FPM circuit. The test fails if the PCM stops receiving the duty cycle signal.</p><p></p><p>Possible Causes: </p><p>Inertia fuel shutoff (IFS) switch needs to be reset </p><p>Open FPDM ground circuit </p><p>Open circuit to FPDM PWR RLY </p><p>Open FPDM PWR circuit </p><p>Open or shorted FPM circuit (engine should start) </p><p>Damaged IFS switch </p><p>Damaged FPDM PWR RLY </p><p>Damaged FPDM </p><p>Damaged PCM </p><p>Also for Mustang: </p><p>Open B+ circuit to the constant control relay module (CCRM) pin 11 </p><p>Open ground to CCRM pin 18 </p><p>Damaged CCRM </p><p></p><p>Diagnostic Aids: The PCM expects to see one of the following duty cycle signals from the FPDM on the FPM circuit: 1) 50% (500 ms on, 500 ms off), all OK. 2) 25% (250 ms on, 750 ms off), FPDM did not receive a fuel pump (FP) duty cycle command from the PCM, or the duty cycle that was received was invalid. 3) 75% (750 ms ON, 250 OFF), the FPDM has detected a fault in the circuits between the FPDM and the fuel pump.</p><p></p><p>I hope this info is helpful...</p></blockquote><p></p>
[QUOTE="FlaSeaDude, post: 8978491, member: 34498"] I don't know if there is a relay for the stock fuel system. I checked on my Ford Service Information CD and and found the following information: Code: P1233 - Fuel System Disabled or Offline Description: The PCM monitors the fuel pump monitor (FPM) circuit from the fuel pump driver module (FPDM). With the key on, the FPDM continuously sends a duty cycle signal to the PCM through the FPM circuit. The test fails if the PCM stops receiving the duty cycle signal. Possible Causes: Inertia fuel shutoff (IFS) switch needs to be reset Open FPDM ground circuit Open circuit to FPDM PWR RLY Open FPDM PWR circuit Open or shorted FPM circuit (engine should start) Damaged IFS switch Damaged FPDM PWR RLY Damaged FPDM Damaged PCM Also for Mustang: Open B+ circuit to the constant control relay module (CCRM) pin 11 Open ground to CCRM pin 18 Damaged CCRM Diagnostic Aids: The PCM expects to see one of the following duty cycle signals from the FPDM on the FPM circuit: 1) 50% (500 ms on, 500 ms off), all OK. 2) 25% (250 ms on, 750 ms off), FPDM did not receive a fuel pump (FP) duty cycle command from the PCM, or the duty cycle that was received was invalid. 3) 75% (750 ms ON, 250 OFF), the FPDM has detected a fault in the circuits between the FPDM and the fuel pump. I hope this info is helpful... [/QUOTE]
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Check Engine Light -Please HELP- Code P1233 FPDM
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