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Home >> Infiniti >> 2010 >> M35 Base >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System - Introduction >> Function Diagnosis >> Fuel Pump Control Module >> System Description >> System Description
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System Description

This system controls the fuel pump operation. The amount of fuel flow delivered from the fuel pump is altered between two flow rates by the FPCM operation. The FPCM determines the voltage supplied to the fuel pump (and therefore fuel flow) according to the following conditions.

AMOUNT OF FUEL FLOW

Conditions Amount of fuel flow Supplied voltage
  • Engine cranking
  • Engine coolant temperature is below 10°C (50°F)
  • Engine is running under high load and high speed conditions
 High Battery voltage (11 - 14 V)
Except the above Low Approx. 8 V
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