STOP AND START SYSTEM TERMINALS OF ECU

  1. ENGINE STOP AND START ECU

    A295480E04

    1. Disconnect the A23, A24 and A25 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

      A23-5 (+B) - Body ground

      B - Body ground

      Power source of engine stop and start ECU

      Ignition switch ON

      9.5 to 14 V

      A23-7 (BIN) - Body ground

      L - Body ground

      Battery

      Always

      9.5 to 14 V

      A23-8 (GND) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

      A24-10 (NE) - Body ground

      V - Body ground

      Engine speed signal from ECM

      Always

      10 kΩ or higher

      A24-17 (VB-) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

      A25-15 (CANH) - Body ground

      P - Body ground

      CAN communication

      Always

      200 Ω or higher

      A25-16 (CANL) - Body ground

      W - Body ground

      CAN communication

      Always

      200 Ω or higher

      A25-17 (IG1) - Body ground

      G - Body ground

      Ignition switch signal

      Ignition switch ON

      9.5 to 14 V

      A25-19 (ACC) - Body ground

      GR - Body ground

      Ignition switch signal

      Ignition switch ACC

      9.5 to 14 V

      A25-20 (IG2) - Body ground

      P - Body ground

      Ignition switch signal

      Ignition switch ON

      9.5 to 14 V

    3. Reconnect the A23, A24 and A25 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

      A24-3 (BRE2) - Body ground

      B - Body ground

      Ground (vacuum sensor assembly (brake booster pressure sensor))

      Always

      Below 1 Ω

      A24-7 (BNT1) - A23-8 (GND)

      R - W-B

      Engine hood courtesy switch (hood lock assembly) signal

      • Ignition switch ON

      • Engine stopped

      • Engine hood closed

      8 to 14 V

      • Ignition switch ON

      • Engine stopped

      • Engine hood open

      0 to 1.5 V

      A24-10 (NE) - A23-8 (GND)

      V - W-B

      Engine speed signal from ECM

      Idling with warm engine

      Pulse generation

      (see waveform 1)

      A24-11 (CLU) - A23-8 (GND)

      P - W-B

      Clutch start switch assembly (for upper) signal

      • Ignition switch ON

      • Clutch pedal released

      Below 1.5 V

      • Ignition switch ON

      • Clutch pedal fully depressed

      8 to 14 V

      A24-13 (PB) - A24-3 (BRE2)

      G - B

      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

      A24-14 (BRVC) - A23-8 (GND)

      R - W-B

      Vacuum sensor assembly (brake booster pressure sensor) power supply

      • Ignition switch ON

      • Engine stopped

      4.5 to 5.5 V

      A24-21 (STA) - A23-8 (GND)

      R - W-B

      Starter operation signal

      Ignition switch ON

      0 V to 1.5 V

      Cranking

      6 V to 14 V

      A24-26 (TMVC) - A23-8 (GND)

      B - W-B

      Neutral position switch power supply

      • Ignition switch ON

      • Engine stopped

      4.5 to 5.5 V

      A24-27 (TMN) - A24-25 (TME2)

      LG - R

      Neutral position switch signal

      • Ignition switch ON

      • Shift lever in neutral

      2.9 to 4.1 V

      • Ignition switch ON

      • Shift lever in any other than neutral

      0.7 to 1.9 V

      A24-28 (CLL) - A23-8 (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

      A25-2 (BO1) - A23-8 (GND)

      SB - W-B

      Backup boost converter signal

      Always

      9.5 to 14 V

      A25-3 (ACO) - A23-8 (GND)

      GR - W-B

      Backup boost converter signal

      Ignition switch ACC

      9.5 to 14 V

      A25-8 (ABON) - A23-8 (GND)*

      V - W-B

      Air conditioning control assembly signal

      • A/C switch off

      • Blower switch off

      8 to 14 V

      • A/C switch on

      • Blower switch on

      Below 1.5 V

      A25-11 (IGO2) - A23-8 (GND)

      P - W-B

      Backup boost converter signal

      Ignition switch ON

      9.5 to 14 V

      A25-12 (IGO1) - A23-8 (GND)

      L - W-B

      Backup boost converter signal

      Ignition switch ON

      9.5 to 14 V

      A25-17 (IG1) - A23-8 (GND)

      G - W-B

      Ignition switch signal

      Ignition switch ACC

      Below 1 V

      Ignition switch ON

      9.5 to 14 V

      A25-19 (ACC) - A23-8 (GND)

      GR - W-B

      Ignition switch signal

      Ignition switch off

      Below 1 V

      Ignition switch ACC

      9.5 to 14 V

      A25-20 (IG2) - A23-8 (GND)

      P - W-B

      Ignition switch signal

      Ignition switch ACC

      Below 1 V

      Ignition switch ON

      9.5 to 14 V

      A25-23 (ECAN) - A23-8 (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

      A25-26 (DEON) - A23-8 (GND)*

      P - W-B

      Air conditioning control assembly signal

      • A/C switch off

      • Blower switch off

      • Defroster switch off

      8 to 14 V

      • A/C switch on

      • Blower switch on

      • Defroster switch on

      Below 1.5 V

      • *: except Automatic Air Conditioning System

    5. A301717E02

      Waveform 1

      Table 1. Engine Speed Signal

      Item

      Content

      Tester Connection

      A24-10 (NE) - A23-8 (GND)

      Tool Setting

      5 V/DIV., 2 ms./DIV.

      Condition

      Idling with warm engine
      Tip:

      The wavelength becomes shorter as the engine speed increases.