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1-26 ENGINE <NON-TURBO> Control System ACTUATORS AND CONTROL FUEL INJECTORS The engine uses electrically operated top feed fuel injectors. The MFI relay (automatic shut down relay) supplies battery voltage to the fuel injectors. The PCM controls the ground path for each injector in sequence. By switching the ground paths on and The PCM determines injector synchronization from IDLE AIR CONTROL MOTOR The idle air control (IAC) motor is mounted on the motor. The PCM adjusts engine idle speed through the idle air control motor to compensate for engine load or ambient conditions. The throttle body has an air bypass passage that provides air for the engine during closed throttle the air bypass passage and regulates air flow sensor inputs. The PCM grounds the MFI and fuel The PCM energizes the injectors in a sequential it beings energizing the injectors in sequence. The PCM adjusts engine idle speed by moving the IAC motor pintle in and out of the bypass passage. The adjustments are based on inputs the PCM re- power steering). AFU0079 |