ENTRY AND START SYSTEM(for Start Function) TERMINALS OF ECU

Tech Tips


  • For the layout of the certification ECU (smart key ECU assembly) (verification-related) terminals, refer to the following Click here.

  • For the layout of the ID code box (immobiliser code ECU) terminals, refer to the following Click here.

  • For the layout of the steering lock ECU terminals, refer to the following Click here.


  1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (STARTING-RELATED)

    A005LM7E02

    1. Disconnect the F63 and F65 certification ECU (smart key ECU assembly) connectors.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item
      F63-4 (ACCD) - Body ground Output L - Body ground ACC signal 20°C (68°F) 152.61 to 216.5 Ω ACC Relay Monitor
      F63-6 (IG1D) - Body ground Output SB - Body ground IG1 signal 20°C (68°F) 50.87 to 72.17 Ω IG1 Relay Monitor (Outside)
      F63-14 (CANH) - Body ground Input/Output L - Body ground CAN communication line Always 10 kΩ or higher -
      F63-15 (CANL) - Body ground Input/Output W - Body ground CAN communication line Always 10 kΩ or higher -
      F63-17 (LIN) - Body ground Input/Output BE - Body ground LIN communication line Always 10 kΩ or higher -
      F63-26 (SLP) - Body ground Input P - Body ground Steering lock bar position signal Always 10 kΩ or higher Steering Unlock Switch
      F63-28 (SSW1) - Body ground Input V - Body ground SSW1 contact signal Engine switch pushed → Engine switch not pushed Below 1 Ω → 10 kΩ or higher Start Switch1
      F63-30 (SSW2) - Body ground Input G - Body ground

      SSW2 contact signal (backup for SSW1 and has same behavior as SSW1)

      Tech Tips

      Backup for SSW1. Behaves the same way as SSW1.

      		 Engine switch pushed → Engine switch not pushed Below 1 Ω → 10 kΩ or higher Start Switch2
      F65-11 (E) - Body ground - BR - Body ground Ground Always Below 1 Ω -
      F65-5 (STAR) - Body ground Input/Output G - Body ground

      Starter relay activation output


      1. Outputs starter relay activation voltage (12 V) when engine is being started. Outputs for maximum of 30 seconds. Turns off when engine speed is 500 rpm or more for 500 ms or more.

      2. for CVT and Multi-mode Manual Transaxle:

        When engine switch is on (IG), it monitors whether park/neutral position switch is on (shift lever in P*1 or N*2) or off (shift lever not in P*1 or N*2). Outputs 12 V through large resistance in ECM. When park/neutral position switch is on, terminal STAR voltage is low (approximately 0.5 V) due to voltage division with starter relay coil resistance (small). When park/neutral position switch is off, terminal STAR voltage is high (approximately 10.5 V).

      3. for Manual Transaxle:

        When engine switch is on (IG), it monitors whether clutch start switch is on or off. When clutch start switch is on, terminal STAR voltage is low (approximately 0.5 V) due to voltage division with starter relay coil resistance (small). When clutch start switch is off, terminal STAR voltage is high (approximately 10.5 V).

      Tech Tips

      When voltage is high, start signal (STAR) is not output even if start command signal (STSW) is input.

      		 Shift lever not in P*1 or N*2 → Shift lever in P*1 or N*2 (20°C [68°F]) 10 kΩ or higher → 93.75 to 136.36 Ω

      1. -

      2. Neutral SW/ Clutch SW
      F65-7 (STA) - Body ground Input SB - Body ground Determines whether engine is being started by monitoring starter relay activation voltage from terminal STAR during engine start 20°C (68°F) 93.75 to 136.36 Ω -
      F65-9 (IG2D) - Body ground Output P - Body ground IG2 signal 20°C (68°F) 74.15 to 460.88 Ω IG2 Relay Monitor (Outside)
      F65-2 (+B) - Body ground Input W - Body ground +B power supply Always 9.5 to 16 V -
      F65-10 (CUTB) - Body ground Input Y - Body ground Dark current cut pin*3 Always 11 to 14 V -
      F65-16 (NE) - Body ground Input V - Body ground Engine speed signal Always 10 kΩ or higher Engine Condition
      F65-18 (STP1) - Body ground Input G - Body ground Stop light switch signal Brake pedal depressed → Brake pedal released 9 V or higher → 1 V or less Stop Light Switch1

      • *1: for CVT

      • *2: for CVT or Multi-mode Manual Transaxle

      • *3: In order to prevent the battery from being depleted when the vehicle is shipped long distances, a fuse that cuts unnecessary electrical load while the vehicle is being shipped is set in the circuit. If the fuse is removed, the circuit becomes open. If the fuse that is between the battery and terminal CUTB is removed and the circuit is open, the certification ECU (smart key ECU assembly) changes to a certain control mode (example: the transmission of electric waves every 250 ms. that form the detection area stops). If the result is not as specified, there may be a malfunction on the wire harness side or the fuse is removed.

      If the result is not as specified, there may be a malfunction in the wire harness.

    3. Reconnect the F63 and F65 certification ECU (smart key ECU assembly) connectors.

    4. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item
      F63-25 (P)*1 - F65-11 (E) Input Y - BR Shift lever P position switch signal Shift lever in P →Shift lever not in P

      Pulse generation

      (See waveform 1)

      		 Shift P Signal
      F63-4 (ACCD) - F65-11 (E) Output L - BR ACC signal Engine switch off → Engine switch on (ACC) 1 V or less → 8.5 V or higher ACC Relay Monitor
      F63-6 (IG1D) - F65-11 (E) Output SB - BR IG1 signal Engine switch on (ACC) → Engine switch on (IG) 1 V or less → 9 V or higher IG1 Relay Monitor(Outside)
      F63-26 (SLP) - F65-11 (E) Input P - BR Steering lock bar position signal Steering locked → Steering unlocked*2 11 to 14 V → 1.2 V or less Steering Unlock Switch
      F63-27 (SPD) - F65-11 (E) Input W - BR Vehicle speed signal Engine switch on (IG), vehicle being driven at approx. 5 km/h (3 mph)

      Pulse generation

      (See waveform 2)

      		 Vehicle Speed Signal
      F63-28 (SSW1) - F65-11 (E) Input V - BR Engine switch signal Engine switch not pushed → Engine switch pushed 9 V or higher → 1 V or less Start Switch1
      F63-29 (SLR+) - F65-11 (E) Output L - BR Steering lock motor activation command signal (motor activation permission signal sent from certification ECU (smart key ECU assembly)) Steering lock motor operating → Steering lock motor not operating → Steering lock motor operating*3

      Pulse generation

      (See waveform 3)

      		 -
      F63-30 (SSW2) - F65-11 (E) Input G - BR

      SSW2 contact signal (backup for SSW1 and has same behavior as SSW1)

      Tech Tips

      Backup for SSW1. Behaves the same way as SSW1.

      		 Engine switch not pushed → Engine switch pushed 9 V or higher → 1 V or less Start Switch2
      F65-7 (STA) - F65-11 (E) Input SB - BR Determines whether engine is being started by monitoring starter relay activation voltage from terminal STAR during engine start Engine is cranking 6 V or higher*4 → 1.5 V or less -
      F65-5 (STAR) - F65-11 (E) Output G - BR

      Starter relay activation output


      1. Outputs starter relay activation voltage (12 V) when engine is being started. Outputs for maximum of 30 seconds. Turns off when engine speed is 500 rpm or more for 500 ms or more.

      2. for CVT and Multi-mode Manual Transaxle:

        When engine switch is on (IG), it monitors whether park/neutral position switch is on (shift lever in P*4 or N*5) or off (shift lever not in P*4 or N*5). Outputs 12 V through large resistance in ECM. When park/neutral position switch is on, terminal STAR voltage is low (approximately 0.5 V) due to voltage division with starter relay coil resistance (small). When park/neutral position switch is off, terminal STAR voltage is high (approximately 10.5 V).

      3. for Manual Transaxle:

        When engine switch is on (IG), it monitors whether clutch start switch is on or off. When clutch start switch is on, terminal STAR voltage is low (approximately 0.5 V) due to voltage division with starter relay coil resistance (small). When clutch start switch is off, terminal STAR voltage is high (approximately 10.5 V).

      Tech Tips

      When voltage is high, start signal (STAR) is not output even if start command signal (STSW) is input.

      		 With brake pedal*5 or clutch pedal*6 depressed, engine switch pressed and held for approx. 1 sec. (starter on) → Engine switch released (starter off) 6 V or higher*4 → 1.5 V or less

      1. -

      2. Neutral SW/ Clutch SW
      F65-16 (NE) - F65-11 (E) Input V - BR Crankshaft position sensor signal Idling with warm engine

      Pulse generation

      (See waveform 4)

      		 Engine Condition
      F65-9 (IG2D) - F65-11 (E) Output P - BR IG2 signal Engine switch on (ACC) → Engine switch on (IG) 1 V or less → 9 V or higher IG2 Relay Monitor(Outside)
      F65-18 (STP1) - F65-11 (E) Input G - BR Stop light switch signal*5 Brake pedal released*2 → Brake pedal depressed 1 V or less → 9 V or higher Stop Light Switch1

      Tech Tips


      • *1: for CVT

      • *2: When the shift lever is in P (for CVT) and the engine switch is off, if any door is opened or closed, the steering is locked. When the key is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering unlocks.

      • *3: The steering lock motor operates when the following conditions are met and a door is opened:


        • The shift lever is in P (for CVT).

        • While carrying the electrical key transmitter, the engine switch is turned on (IG) to unlock the steering, and then the engine switch is turned off.

      • *4: When the engine is cranking, the battery voltage may momentarily drop to approximately 6 V.

      • *5: for CVT or Multi-mode Manual Transaxle

      • *6: for Manual Transaxle

    5. Using an oscilloscope, check the waveform of the ECU.


      1. A005LJ0E03
        Text in Illustration
        *a Shift lever in P
        *b Shift lever not in P

        Waveform 1 (for CVT)

        Item Content
        Tester Connection F63-25 (P) - F65-11 (E)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Vehicle Condition Shift lever in P → Shift lever not in P
      2. A005MGGE01

        Waveform 2

        Item Content
        Tester Connection F63-27 (SPD) - F65-11 (E)
        Tool Setting 5 V/DIV., 100 ms./DIV.
        Vehicle Condition Engine switch on (IG), vehicle being driven at approx. 5 km/h (3 mph)

        Tech Tips

        The wavelength becomes shorter as the vehicle speed increases.

      3. A005K8EE02
        Text in Illustration
        *a Steering lock motor not operating
        *b Steering lock motor operating

        Waveform 3

        Item Content
        Tester Connection F63-29 (SLR+) - F65-11 (E)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Vehicle Condition Steering lock motor not operating → Steering lock motor operating → Steering lock motor not operating
      4. A005HHUE01

        Waveform 4

        Item Content
        Tester Connection F65-16 (NE) - F65-11 (E)
        Tool Setting 1 V/DIV., 2 ms./DIV.
        Vehicle Condition Idling with warm engine

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.