Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - 2001 zx3 wont start
View Single Post
Old 12-14-2012, 08:35 PM   #11
DTC P0606
BC_ZX3's Avatar
Join Date: Jul 2007
Fan#: 48751
Location: Vancouver, BC, Canada
What I Drive: 2001 Red ZX3 Turbo

Posts: 3,310
Points 2,440, Level 29
Points: 2,440, Level: 29 Points: 2,440, Level: 29 Points: 2,440, Level: 29
Level Up 94% Completed
Level up: 94% Level up: 94% Level up: 94%
Forum Activity 11%
Activity: 11% Activity: 11% Activity: 11%
FF Reputation: 98 BC_ZX3 Excellent Standing Member
Buy-Sell-Trade Rating: (3)
P1237 - Fuel Pump Secondary Circuit Malfunction
Indicates that the FPDM has detected a fuel pump secondary circuit fault. The FPDM will send a message to the PCM through the FPM circuit, indicating that this failure has been detected. The PCM will set the DTC when the message is received.
Open or shorted FP PWR circuit
Open FP RTN circuit to FPDM
Open or shorted circuit in the fuel pump
Locked fuel pump rotor
Damaged FPDM
The FPDM sends a 75% duty cycle (750 msec ON, 250 msec OFF) through the FPM circuit to the PCM while the fault is being detected by the FPDM. If the fault is no longer detected, the PCM will return to sending an "all OK" (50% duty cycle) message to the PCM. The PCM will keep P1237 stored in Continuous Memory.
The FPDM controls pump speed by supplying a "variable" ground on the RTN circuit.

BC_ZX3 is offline  
    Reply With Quote