SFI SYSTEM


  1. FUNCTION


    1. When the engine switch is pressed with the brake pedal depressed and the shift lever in P or N, this function operates the starter until the engine starts. This prevents application of the starter assembly for an inadequate length of time. It also prevents the engine from being cranked after it has started.

    2. When the certification ECU (smart key ECU assembly) detects a start signal (STSW), the certification ECU (smart key ECU assembly) outputs a starter relay drive signal (STAR). The signal goes through the park/neutral position switch assembly to the starter relay. The starter relay activates the starter assembly when it receives this signal. At this time, the certification ECU (smart key ECU assembly) turns off the ACC relay by turning off the power sent from the ACCD terminal. The ACC relay is turned off to prevent flickering of the meters, clock and audio system.

    3. When communication between the certification ECU (smart key ECU assembly) and ECM stops, the certification ECU (smart key ECU assembly) uses the engine speed (NE) signal received from the ECM via a direct line to determine when to turn off the starter.

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    4. While cranking, the certification ECU (smart key ECU assembly) continues energizing the starter relay until it is determined that the engine has started. When the certification ECU (smart key ECU assembly) has judged that the engine has started, the certification ECU (smart key ECU assembly) stops energizing the starter relay.

    5. If the engine does not start even though the starter has cranked for 30 seconds, the starter relay is turned off to protect the starter motor.

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    6. This system has the following safety features:


      • While the engine is running, the starter cannot be operated

      • The starter will stop operating once the engine has started, even if the engine switch remains pushed.

      • Starter operation is limited to 30 seconds to protect the starter motor.