STOP AND START SYSTEM TERMINALS OF ECU


  1. ENGINE STOP AND START ECU

    B003X3EE02

    1. Disconnect the A93, A94 and K139 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
      A93-1 (BIN2) - Body ground R - Body ground Battery Always 9.5 to 14 V
      A93-2 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A93-3 (BIN1) - Body ground W - Body ground Battery Always 9.5 to 14 V
      A93-8 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A94-1 (+B) - Body ground R - Body ground Power source of engine stop and start ECU Engine switch on (IG) 9.5 to 14 V
      A94-6 (DGND) - Body ground BR - Body ground Ground Always Below 1 Ω
      A94-10 (NE) - Body ground B - Body ground Engine speed signal from ECM Always 10 kΩ or higher
      K139-13 (CANH) - Body ground GR - Body ground CAN communication Always 200 Ω or higher
      K139-14 (CANL) - Body ground B - Body ground CAN communication Always 200 Ω or higher
      K139-18 (IG2) - Body ground B - Body ground Engine switch signal Engine switch on (IG) 9.5 to 14 V
      K139-19 (ACC) - Body ground BE - Body ground Engine switch signal Engine switch on (ACC) 9.5 to 14 V
      K139-20 (ILL) - Body ground G - Body ground Headlight dimmer switch (light control switch) tail signal input Headlight dimmer switch (light control switch) in tail or head position 9.5 to 14 V
      K139-21 (IG1) - Body ground P - Body ground Engine switch signal Engine switch on (IG) 9.5 to 14 V

    3. Reconnect the A93, A94 and K139 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
      A94-3 (BRE2) - Body ground V - Body ground Ground (vacuum sensor assembly) Always Below 1 Ω
      A94-5 (WP) - Body ground L - Body ground Heater accessory assembly (heater water pump assembly) signal Heater accessory assembly (heater water pump assembly) not operating 8 to 14 V
      Heater accessory assembly (heater water pump assembly) operating 0 to 1.5 V
      A94-7 (BNT1) - A94-6 (DGND) W - BR Engine hood courtesy switch (Hood lock assembly) signal

      • Engine switch on (IG)

      • Engine stopped

      • Engine hood closed

      		 0 to 1.5 V

      • Engine switch on (IG)

      • Engine stopped

      • Engine hood open

      		 8 to 14 V
      A94-10 (NE) - A94-6 (DGND) B - BR Engine speed signal from ECM Idling after engine warmed up

      Pulse generation

      (see waveform 1)
      A94-13 (PB) - A94-3 (BRE2) BE - V Vacuum sensor assembly signal

      • Engine switch on (IG)

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

      		 1.6 to 2.0 V

      • Engine switch on (IG)

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

      		 2.2 to 2.6 V

      • Engine switch on (IG)

      • Atmospheric pressure applied to vacuum sensor assembly

      		 3.4 to 3.8 V
      A94-14 (BRVC) - A94-6 (DGND) P - BR Vacuum sensor assembly power supply

      • Engine switch on (IG)

      • Engine stopped

      		 4.5 to 5.5 V
      A94-17 (CLL) - A94-6 (DGND) L - BR Park/neutral position switch assembly signal

      • Engine switch on (IG)

      • Shift lever not in P or N

      		 8 to 14 V

      • Engine switch on (IG)

      • Shift lever in P or N

      		 Below 3.0 V
      A94-19 (DON2) - A94-6 (DGND) LG - BR Eco-run vehicle converter assembly (external backup boost converter) signal Engine running

      Pulse generation

      (see waveform 2)
      A94-21 (STA) - A94-6 (DGND) R - BR Starter pinion operation signal Cranking 6.0 V or more
      A94-23 (STA2) - A94-6 (DGND) B - BR Starter motor operation signal Cranking 6.0 V or more
      K139-1 (IG31) - A94-6 (DGND) LG - BR Backup boost converter signal Engine switch on (IG) 10.5 to 16 V
      K139-2 (B41) -A94-6 (DGND) R - BR Backup boost converter signal Always 10.5 to 16 V
      K139-3 (IG41) - A94-6 (DGND) Y - BR Backup boost converter signal Engine switch on (IG) 10.5 to 16 V
      K139-5 (ECAN) -A94-6 (DGND) LG - BR Stop and start system cancel switch (combination switch assembly) signal

      • Engine switch on (IG)

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

      		 0 to 1.5 V

      • Engine switch on (IG)

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

      		 8 to 14 V
      K139-6 (IG11) - A94-6 (DGND) B - BR Backup boost converter signal Engine switch on (IG) 10.5 to 16 V
      K139-8 (EGND) -A93-8 (GND1) R - W-B Oil pump assembly with solenoid directions signal

      Either of the following conditions is met:


      • Engine stopped by stop and start control

      • Engine switch on (IG) (engine not running) and Active Test "Electromagnetic Oil Pump" being performed

      Pulse generation

      (see waveform 3)
      K139-9 (EMOP) -A93-8 (GND1) L - W-B Oil pump assembly with solenoid directions signal

      Either of the following conditions is met:


      • Engine stopped by stop and start control

      • Engine switch on (IG) (engine not running) and Active Test "Electromagnetic Oil Pump" being performed

      Pulse generation

      (see waveform 3)
      K139-10 (IG12) - A94-6 (DGND) GR - BR Backup boost converter signal Engine switch on (IG) 10.5 to 16 V
      K139-11 (B43) - A94-6 (DGND) V - BR Backup boost converter signal Always 10.5 to 16 V
      K139-12 (B42) - A94-6 (DGND) SB - BR Backup boost converter signal Always 10.5 to 16 V
      K139-15 (AC42) - A94-6 (DGND) GR - BR Backup boost converter signal Engine switch on (ACC) 10.5 to 16 V
      K139-16 (B12) - A94-6 (DGND) P - BR Backup boost converter signal Always 10.5 to 16 V
      K139-18 (IG2) - A94-6 (DGND) B - BR Engine switch signal Engine switch on (ACC) Below 1 V
      Engine switch on (IG) 9.5 to 14 V
      K139-19 (ACC) - A94-6 (DGND) BE - BR Engine switch signal Engine switch off Below 1 V
      Engine switch on (ACC) 9.5 to 14 V
      K139-21 (IG1) - A94-6 (DGND) P - BR Engine switch signal Engine switch on (ACC) Below 1 V
      Engine switch on (IG) 9.5 to 14 V
      K139-24 (AC41) - A94-6 (DGND) SB - BR Backup boost converter signal Engine switch on (ACC) 10.5 to 16 V
      K139-25 (IL41) - A94-6 (DGND) W - BR Backup boost converter signal Headlight dimmer switch (light control switch) in tail or head position 10.5 to 16 V
      K139-26 (IG13) - A94-6 (DGND) W - BR Backup boost converter signal Engine switch on (IG) 10.5 to 16 V
    5. B003WEME03
      *a 5 V/DIV.
      *b 2 ms./DIV.

      Waveform 1

      Item Content
      Tester Connection A94-10 (NE) - A94-6 (DGND)
      Tool Setting 5 V/DIV., 2 ms./DIV.
      Condition Idling after engine warmed up
    6. B003VB5E07
      *a 5 V/DIV.
      *b 2 ms/DIV.

      Waveform 2

      Item Content
      Tester Connection A94-19 (DON2) - A94-6 (DGND)
      Tool Setting 5 V/DIV., 2 ms./DIV.
      Condition Engine running
    7. B003T6DE01
      *1 10 V/DIV.
      *2 20 ms./DIV.

      Waveform 3

      Item Content
      Tester Connection

      K139-8 (EGND) - A93-8 (GND1)

      K139-9 (EMOP) - A93-8 (GND1)
      Tool Setting 10 V/DIV., 20 ms./DIV.
      Condition

      Either of the following conditions is met:


      • Engine stopped by stop and start control

      • Engine switch on (IG) (engine not running) and Active Test "Electromagnetic Oil Pump" being performed