What is a FICM?  What is an FICM (Fuel Injection Control Module) and what                         does it do?source: http:...
FICM and its  Location     source: http://www.buyautoparts.com/howto/what-is-a-ficm.htm
What is a FICM?• The FICM is the unit in a diesel motor that  controls the electrical impulses that open and  close the fu...
source:    http://www.buyau    toparts.com/howt       o/what-is-a-         ficm.htm•    The above drawing shows the techni...
•   The internal structure of the FICM    is shown here. The FICM internally    generates 48V used to drive the    injecto...
•   To drive the fuel injector, the FICM    produces two control signals for each    injector.•   The open coil is driven ...
•   The FICM is isolated from the    engine with vibration dampers.    The dampers reduce the    amount of engine vibratio...
What is a FICM?                                The EndFor more Auto How To Tips visit, http://www.buyautoparts.com/howto/I...
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What is a FICM?

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A easy to read and understand presentation all about FICMs. What is a FICM, what does FICM stand for, and what does it do? This presentation answers all those questions plus a lot more. Checkout the rest of the presentations from Buy Auto Parts for more helpful details on anything auto parts!

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What is a FICM?

  1. 1. What is a FICM? What is an FICM (Fuel Injection Control Module) and what does it do?source: http://www.buyautoparts.com/howto/repair-electronics.htm
  2. 2. FICM and its Location source: http://www.buyautoparts.com/howto/what-is-a-ficm.htm
  3. 3. What is a FICM?• The FICM is the unit in a diesel motor that controls the electrical impulses that open and close the fuel injectors.• The FICM or Fuel Injection Control Module uses electrical impulses to actuate the pressure doors that allow the diesel fuel to flow to the cylinders.• This system is set up this way because the diesel motor uses extremely high fuel pressure to fill the cylinders when the door is open and many systems would fail under such pressures. source: http://www.buyautoparts.com/howto/what-is-a-ficm.htm
  4. 4. source: http://www.buyau toparts.com/howt o/what-is-a- ficm.htm• The above drawing shows the technical breakdown of how an FICM works.• The FICM drives the fuel injectors solenoids based on fuel and timing commands from the PCM. It uses engine speed and position signals to determine when the injectors need to be activated.• The ignition switch provides "KEYPWR to the FICM. Once this signal is detected by the FICM, the "MPR output of the FICM will engage the FICM relay. This in turn provides the FICM PWR and FICM Logic PWR voltages to the FICM.• The FICM provides a feedback signal to the PCM indicating when the FICM is providing control signals to the injector (fueling) .• the FICM will cycle through the injector outputs when the key is placed in the ON position. Thus is called pre-cycle and the time of pre-cycle varies with the engine temperature. The Pre-cycle is done as a self-test of the injector circuits.
  5. 5. • The internal structure of the FICM is shown here. The FICM internally generates 48V used to drive the injector solenoids.• Each individual injector is controlled with four driver outputs from the FICM. There are high and low side drivers fir the open and close of each injector.• On 2004.25+ (1845117C2 FICMs) the low side driver is actually shared among 4 injectors. This means an injector short to ground on the low side could produce four different cylinder error codes. On 2003.25 (1837127C4 FICMs) there are individual low side drivers for each injector. This means a low side failure would result in a single injector error source: code. Note: Internal FICM part http://www.buyauto numbers are located on a label on parts.com/howto/fic the connector side of the module. m-intro-page-2.htm
  6. 6. • To drive the fuel injector, the FICM produces two control signals for each injector.• The open coil is driven (via 20A pulse) to open the injector. This shifts the spool valve in the injector to the open state. Once this has taken place, high pressure oil is directed on top of the injector intensifier piston. in result, fuel is being delivered through the nozzle of the injector.• Once the desired fuel has been delivered, as calculated by the PCM/FICM, the close coil is driven to close the injector. This stops the distribution of thigh pressure oil to the top of the intensifier piston thus stopping the delivery of fuel.• The net time between pulses is equivalent to the pulse width used to provide fueling.• The coil on time is currently calibrated from "400us to 5.8ms". The 5.8ms is for cold starts. As the engine warms up the duration decreases and settles around 800us depending on the amount of fuel being commanded. source: http://www.buyauto parts.com/howto/fic m-intro-page-3.htm
  7. 7. • The FICM is isolated from the engine with vibration dampers. The dampers reduce the amount of engine vibration induced into the module and protects the internal electronics.• Note: It is very important for the long term reliability of the FICM that the isolators be reinstalled after any service work is performed.• On 2003.25 6.0L engines, the dampers were mounted directly to the FICM.• On 2004.25 6.0L engines, the dampers were moved to base of the bracket supporting the FICM.• Econoline chassis have the FICM mounted in the engine compartment near the brake booster. The FICM is mounted with vibration dampers and they should be replaced upon source: completion of any service. http://www.buyauto parts.com/howto/fic m-intro-page-4.htm
  8. 8. What is a FICM? The EndFor more Auto How To Tips visit, http://www.buyautoparts.com/howto/If you need to purchase an auto part- Visit www.buyautoparts.com- Call 1-888-907-7225- Or send an email to sales@buyautoparts.com THANKS source: http://www.buyautoparts.com/howto/ficm-install-tsb.htm

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