SFI SYSTEM DETAILS STARTER CONTROL (CRANKING HOLD FUNCTION)

  1. OPERATION

    1. When the engine switch is pressed, the certification ECU (smart key ECU assembly) receives a start signal.

    2. When the certification ECU (smart key ECU assembly) detects a start signal (SSW1), the certification ECU (smart key ECU assembly) outputs a starter relay drive signal (STAR). This signal goes through the clutch start switch assembly*1 or neutral position switch assembly*2 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 output from the ACCD terminal. The ACC relay is turned off to prevent illumination of the meters, clock and audio from flickering.

      *1: Models with manual transaxle

      *2: Models with multi-mode manual transaxle

    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 assembly.

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    4. While the engine is 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, the starter operates for a length of time that is based on the engine coolant temperature. This can vary from 30 seconds at lower temperatures to 2 seconds when the engine is at operating temperature.

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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 a maximum of 30 seconds to protect the starter motor.