LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2005 >> Escape Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 35 (Engine Controls - Powertrain DTC Charts And Description - (Hybrid)) >> Diagnostic Trouble Code (DTC) Charts and Descriptions >> P1233 - Fuel System Disabled Or Offline

P1233 - Fuel System Disabled Or Offline

WARNING: This page is about a different variant/trim than selected.
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: 
  • Front inertia fuel shutoff (IFS) switch needs to be reset.
  • Open FPDM ground circuit.
  • Open VPWR to FPDM.
  • Open or shorted FPM circuit (engine should start).
  • Damaged front IFS switch.
  • Damaged FPDM.
  • Damaged PCM.
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.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to Pinpoint Test KB .
scientia non olet · About LEMON Manuals