STOP AND START SYSTEM(for 2WW) TERMINALS OF ECU


  1. ENGINE STOP AND START ECU

    A01QSAKE01

    1. Disconnect the A86, A66 and G87 engine stop and start ECU connectors.

    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
      A86-1 (BIN2) - Body ground R - Body ground Battery Always 9.5 to 14 V
      A86-2 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A86-3 (BIN1) - Body ground L - Body ground Battery Always 9.5 to 14 V
      A86-8 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A66-1 (+B) - Body ground B - Body ground Power source of engine stop and start ECU Ignition switch ON 9.5 to 14 V
      A66-6 (DGND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A66-10 (NE) - Body ground P - Body ground Engine speed signal from ECM Always 10 kΩ or higher
      G87-13 (CANH) - Body ground LG - Body ground CAN communication Always 200 Ω or higher
      G87-14 (CANL) - Body ground W - Body ground CAN communication Always 200 Ω or higher
      G87-18 (IG2) - Body ground V - Body ground Ignition switch signal Ignition switch ON 9.5 to 14 V
      G87-19 (ACC) - Body ground

      for LHD: L - Body ground

      for RHD: W - Body ground

      Ignition switch signal Ignition switch ACC 9.5 to 14 V
      G87-21 (IG1) - Body ground L - Body ground Ignition switch signal Ignition switch ON 9.5 to 14 V
    3. Reconnect the A86, A66 and G87 engine stop and start ECU connectors.

    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
      A66-3 (BRE2) - Body ground G - Body ground Ground (vacuum sensor assembly) Always Below 1 Ω
      A66-7 (BNT1) - A66-6 (DGND) B - 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
      A66-8 (TMN) - A66-25 (TME2) L - BR Neutral position sensor (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
      A66-10 (NE) - A66-6 (DGND) P - W-B Engine speed signal from ECM Idling after engine warmed up

      Pulse generation

      (see waveform 1)

      A66-11 (CLU) - A66-6 (DGND) L - 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
      A66-13 (PB) - A66-3 (BRE2) SB - G Vacuum sensor assembly signal
      • Ignition switch ON

      • Absolute pressure of 40 kPa (300 mmHg, 11.8 in.Hg) applied to vacuum sensor assembly

      1.6 to 2.0 V

      • Ignition switch ON

      • Absolute pressure of 60 kPa (450 mmHg, 17.7 in.Hg) applied to vacuum sensor assembly

      2.2 to 2.6 V

      • Ignition switch ON

      • Atmospheric pressure applied to vacuum sensor assembly

      3.4 to 3.8 V
      A66-14 (BRVC) - A66-6 (DGND) L - W-B Vacuum sensor assembly power supply
      • Ignition switch ON

      • Engine stopped

      4.5 to 5.5 V
      A66-17 (CLL) - A66-6 (DGND) 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
      A66-21 (STA) - A66-6 (DGND) LG - W-B Starter pinion operation signal Cranking 6.0 V or more
      A66-26 (TMVC) - A66-6 (DGND) G - W-B Neutral position sensor (Neutral position switch) power supply
      • Ignition switch ON

      • Engine stopped

      4.5 to 5.5 V
      G87-1 (IG31) - A66-6 (DGND) L - W-B Backup boost converter signal Ignition switch ON 10.5 to 16 V
      G87-2 (B41) - A66-6 (DGND) SB - W-B Backup boost converter signal Always 10.5 to 16 V
      G87-3 (IG41) - A66-6 (DGND) L - W-B Backup boost converter signal Ignition switch ON 10.5 to 16 V
      G87-4 (CHI)* - A66-6 (DGND) 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
      G87-5 (ECAN) - A66-6 (DGND) R - W-B Stop and start system cancel switch signal
      • Ignition switch ON

      • Stop and start system cancel switch pressed

      0 to 1.5 V

      • Ignition switch ON

      • Stop and start system cancel switch not press

      8 to 14 V
      G87-6 (IG11) - A66-6 (DGND) L - W-B Backup boost converter signal Ignition switch ON 10.5 to 16 V
      G87-10 (IG12) - A66-6 (DGND) P - W-B Backup boost converter signal Ignition switch ON 10.5 to 16 V
      G87-12 (B42) - A66-6 (DGND) SB - W-B Backup boost converter signal Always 10.5 to 16 V
      G87-18 (IG2) - A66-6 (DGND) V - W-B Ignition switch signal Ignition switch ACC Below 1 V
      Ignition switch ON 9.5 to 14 V
      G87-19 (ACC) - A66-6 (DGND)

      for LHD: L - W-B

      for RHD: W - W-B

      Ignition switch signal Ignition switch off Below 1 V
      Ignition switch ACC 9.5 to 14 V
      G87-21 (IG1) - A66-6 (DGND) L - W-B Ignition switch signal Ignition switch ACC Below 1 V
      Ignition switch ON 9.5 to 14 V
      G87-24 (AC41) - A66-6 (DGND) G - W-B Backup boost converter signal Ignition switch ACC 10.5 to 16 V

      • *: w/ Combustion Type Power Heater System

    5. A01QQ4AE03
      *a 5 V/DIV.
      *b 2 ms./DIV.

      Waveform 1

      Item Content
      Tester Connection A66-10 (NE) - A66-6 (DGND)
      Tool Setting 5 V/DIV., 2 ms./DIV.
      Condition Idling after engine warmed up