STOP AND START SYSTEM TERMINALS OF ECU


  1. ENGINE STOP AND START ECU

    A00Y5VKE01

    1. Disconnect the A8, A9 and E24 engine stop and start ECU connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A8-5 (+B) - Body ground B - Body ground Power source of engine stop and start ECU Ignition switch ON 9.5 to 14 V
      A8-7 (BIN) - Body ground L - Body ground Battery Always 9.5 to 14 V
      A8-8 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A9-10 (NE) - Body ground L - Body ground Engine speed signal from ECM Always 10 kΩ or higher
      A9-17 (VB-) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E24-15 (CANH) - Body ground P - Body ground CAN communication Always 200 Ω or higher
      E24-16 (CANL) - Body ground W - Body ground CAN communication Always 200 Ω or higher
      E24-17 (IG1) - Body ground L - Body ground Ignition switch signal Ignition switch ON 9.5 to 14 V
      E24-19 (ACC) - Body ground GR - Body ground Ignition switch signal Ignition switch ACC 9.5 to 14 V
      E24-20 (IG2) - Body ground P - Body ground Ignition switch signal Ignition switch ON 9.5 to 14 V

    3. Reconnect the A8, A9 and E24 engine stop and start ECU connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A9-3 (BRE2) - Body ground G - Body ground Ground (vacuum sensor assembly (brake booster pressure sensor)) Always Below 1 Ω
      A9-7 (BNT1) - A8-8 (GND) R - W-B Engine hood courtesy switch (hood lock assembly) signal

      • Ignition switch ON

      • Engine stopped

      • Engine hood closed

      		 0 to 1.5 V

      • Ignition switch ON

      • Engine stopped

      • Engine hood open

      		 8 to 14 V
      A9-10 (NE) - A8-8 (GND) L - W-B Engine speed signal from ECM Idling after engine warmed up

      Pulse generation

      (see waveform 1)
      A9-11 (CLU) - A8-8 (GND) GR - W-B Clutch start switch assembly (for upper) signal

      • Ignition switch ON

      • Clutch pedal released

      		 8 to 14 V

      • Ignition switch ON

      • Clutch pedal fully depressed

      		 Below 1.5 V
      A9-13 (PB) - A9-3 (BRE2) B - G Vacuum sensor assembly (brake booster pressure sensor) signal

      • Ignition switch ON

      • Absolute pressure of 40 kPa 40 kPa (0.4 kgf/cm2, 5.8 psi) applied to vacuum sensor assembly (brake booster pressure sensor)

      		 1.6 to 2.0 V

      • Ignition switch ON

      • Absolute pressure of 60 kPa (0.6 kgf/cm2, 8.7 psi) applied to vacuum sensor assembly (brake booster pressure sensor)

      		 2.2 to 2.6 V

      • Ignition switch ON

      • Atmospheric pressure applied to vacuum sensor assembly (brake booster pressure sensor)

      		 3.4 to 3.8 V
      A9-14 (BRVC) - A8-8 (GND) P - W-B Vacuum sensor assembly (brake booster pressure sensor) power supply

      • Ignition switch ON

      • Engine stopped

      		 4.5 to 5.5 V
      A9-21 (STA) - A8-8 (GND) LG - W-B Starter operation signal Ignition switch ON 0 V to 1.5 V
      Cranking 6 V to 14 V
      A9-26 (TMVC) - A8-8 (GND) B - W-B Neutral position switch power supply

      • Ignition switch ON

      • Engine stopped

      		 4.5 to 5.5 V
      A9-27 (TMN) - A9-25 (TME2) R - GR Neutral position switch signal

      • Ignition switch ON

      • Shift lever in neutral

      		 2.7 to 4.3 V

      • Ignition switch ON

      • Shift lever in any other than neutral

      		 0.7 to 1.9 V
      A9-28 (CLL) - A8-8 (GND) W - W-B Clutch start switch assembly (for lower) signal

      • Ignition switch ON

      • Clutch pedal released

      		 8 to 14 V

      • Ignition switch ON

      • Clutch pedal fully depressed

      		 Below 1.5 V
      E24-2 (BO1) - A8-8 (GND) SB - W-B Backup boost converter signal Always 9.5 to 14 V
      E24-3 (ACO) - A8-8 (GND) GR - W-B Backup boost converter signal Ignition switch ACC 9.5 to 14 V
      E24-4 (CH1) - A8-8 (GND)* R - W-B Combustion type Power heater system operating signal

      • Ignition switch ON

      • Heater switch assembly on

      		 9.5 to 14 V

      • Ignition switch ON

      • Heater switch assembly off

      		 Below 1 V
      E24-11 (IGO2) - A8-8 (GND) P - W-B Backup boost converter signal Ignition switch ON 9.5 to 14 V
      E24-12 (IGO1) - A8-8 (GND) L - W-B Backup boost converter signal Ignition switch ON 9.5 to 14 V
      E24-17 (IG1) - A8-8 (GND) L - W-B Ignition switch signal Ignition switch ACC Below 1 V
      Ignition switch ON 9.5 to 14 V
      E24-19 (ACC) - A8-8 (GND) GR - W-B Ignition switch signal Ignition switch off Below 1 V
      Ignition switch ACC 9.5 to 14 V
      E24-20 (IG2) - A8-8 (GND) P - W-B Ignition switch signal Ignition switch ACC Below 1 V
      Ignition switch ON 9.5 to 14 V
      E24-23 (ECAN) - A8-8 (GND) V - W-B Stop and start system cancel switch (ecorun cancel switch assembly) signal

      • Ignition switch ON

      • Stop and start system cancel switch (ecorun cancel switch assembly) pressed

      		 0 to 1.5 V

      • Ignition switch ON

      • Stop and start system cancel switch (ecorun cancel switch assembly) not pressed

      		 8 to 14 V

      • *: w/ Combustion Type Power Heater System

    5. A00Y8WPE02

      Waveform 1

      Engine Speed Signal
      Item Content
      Tester Connection NE - GND
      Tool Setting 5 V/DIV, 2 ms/DIV
      Condition Idling after engine warmed up

      Tech Tips

      The wavelength become shorter as the engine speed increases.