ENTRY AND START SYSTEM TERMINALS OF ECU


  1. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

    A000ZBPE03

    1. Disconnect the L12, L13 and DA main body ECU connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L13-6 (AM1) - Body ground W - Body ground +B power supply Always 11 to 14 V
      L12-1 (AM2) - Body ground W - Body ground +B power supply Always 11 to 14 V
      L13-17 (SSW1) - Body ground W - Body ground Power switch 1 input Power switch pushed Below 1 Ω
      L13-17 (SSW1) - Body ground W - Body ground Power switch 1 input Power switch not pushed 10 kΩ or higher
      L13-16 (SSW2) - Body ground L - Body ground Power switch 2 input Power switch pushed Below 1 Ω
      L13-16 (SSW2) - Body ground L - Body ground Power switch 2 input Power switch not pushed 10 kΩ or higher
      DA-40 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      DA-23 or DA-52 (LIN1) - Body ground BE - Body ground LIN line Always 10 kΩ or higher

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

    3. Reconnect the L12, L13 and DA main body ECU connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L13-22 (ACCD) - DA-40 (GND1) G - W-B D-ACC relay drive signal Power switch ON (ACC) 11 to 14 V
      L13-22 (ACCD) - DA-40 (GND1) G - W-B D-ACC relay drive signal Power switch OFF Below 1 V
      L12-11 (IG2D) - DA-40 (GND1) P - W-B Ignition relay No. 2 (IG2) drive signal Power switch ON (IG) 11 to 14 V
      L12-11 (IG2D) - DA-40 (GND1) P - W-B Ignition relay No. 2 (IG2) drive signal Power switch ON (ACC) Below 1 V
      L13-19 (SLR+) - DA-40 (GND1) SB - W-B Steering lock power supply Steering lock motor operating Below 1 V
      L13-19 (SLR+) - DA-40 (GND1) SB - W-B Steering lock power supply Steering lock motor not operating 11 to 14 V
      L13-18 (SLP) - DA-40 (GND1) LG - W-B Steering lock actuator position signal Steering lock locked 11 to 14 V
      L13-18 (SLP) - DA-40 (GND1) LG - W-B Steering lock actuator position signal Steering lock released Below 1 V
      L11-9 (SPD) - DA-40 (GND1) V - W-B Speed signal from combination meter Power switch ON (IG), rotate driving wheel slowly

      Pulse generation

      (see waveform 1)
      L11-8 (RDY) - DA-40 (GND1) W - W-B Power switch ON (READY) signal Power switch ON (READY)

      Pulse generation

      (see waveform 2)
      A68-2 (P) - DA-40 (GND1) Y - W-B Shift lock signal Shift lever in P

      Pulse generation

      (see waveform 3)
      A68-2 (P) - DA-40 (GND1) Y - W-B Shift lock signal Shift lever not in P Below 1 V
      A68-4 (STSW) - DA-40 (GND1) B - W-B Hybrid control system activation request signal Brake pedal depressed with shift lever in P, power switch pushed once 11 to 14 V
      L13-15 (INDS) - DA-40 (GND1) B - W-B Vehicle condition signal Brake pedal depressed with shift lever in P, power switch OFF, ON (ACC, IG) 9 to 14 V
      L13-14 (INDW) - DA-40 (GND1) P - W-B Vehicle condition signal Brake pedal released with shift lever in P, power switch OFF, ON (ACC, IG) 9 to 14 V
      L13-25 (SWIL) - DA-40 (GND1) R - W-B Illumination signal Light control switch TAIL or HEAD 11 to 14 V
      DH-15 (STP) - DA-40 (GND1) L - W-B Stop light switch signal Brake pedal depressed 11 to 14 V
      DH-15 (STP) - DA-40 (GND1) L - W-B Stop light switch signal Brake pedal released Below 1 V

      If the result is not as specified, the ECU may have a malfunction.

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


      1. A000ZYKE07

        Waveform 1

        Reference
        Terminal No. (Symbols) Tool Setting Condition
        L11-9 (SPD) - DA-40 (GND1) 5 V/DIV., 100 msec./DIV. Driving at approx. 20 km/h (12 mph)

        Tech Tips

        As the vehicle speed increases, the wavelength shortens.

      2. A000VVXE15
        *1 Power switch ON (IG)
        *2 Power switch ON (READY)

        Waveform 2

        Reference
        Terminal No. (Symbols) Tool Setting Condition
        L11-8 (RDY) - DA-40 (GND1) 10 V/DIV., 10 msec./DIV. Power switch ON (IG) or ON (READY)
      3. A000XR5E04

        Waveform 3

        Reference
        Terminal No. (Symbols) Tool Setting Condition
        A68-2 (P) - DA-40 (GND1) 2 V/DIV., 20 msec./DIV. Shift lever in P

  2. CHECK CERTIFICATION ECU

    A000TGBE03

    1. Disconnect the L15 certification ECU connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L15-1 (+B1) - Body ground L - Body ground +B power supply Always 11 to 14 V
      L15-10 (LIN) - Body ground BE - Body ground LIN line Always 10 kΩ or higher
      L15-17 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the L15 certification ECU connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L15-18 (IG) - Body ground L - Body ground Ignition power supply Power switch ON (IG) 11 to 14 V
      L15-18 (IG) - Body ground L - Body ground Ignition power supply Power switch OFF Below 1 V

      If the result is not as specified, the main body ECU may have malfunction.

  3. CHECK HYBRID VEHICLE CONTROL ECU

    A000UZKE02

    1. Disconnect the A76, A77, A78 and E58 hybrid vehicle control ECU connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      A76-1 (BATT) - A77-7 (E1) B-W - W-B Battery (for measuring battery voltage and for hybrid vehicle control ECU memory) Always 11 to 14 V
      A78-1 (+B1) - A77-7 (E1) B - W-B Power source of hybrid vehicle control ECU Power switch ON (IG) 11 to 14 V
      A76-4 (IGSW) - A77-7 (E1) R - W-B Power switch signal Always 11 to 14 V
      A77-7 (E1) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the A76, A77, A78 and E58 hybrid vehicle control ECU connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      A78-29 (RDY) - A77-7 (E1) W - W-B Hybrid control system ON (READY) signal (output) Power switch ON (READY)

      Pulse generation

      (see waveform 1)
      A78-28 (ST2) - A77-7 (E1) B - W-B Hybrid control system activation request signal Brake pedal depressed with shift lever in P, power switch pushed once 0 to 1.5 V

      If the result is not as specified, the hybrid vehicle control ECU may have a malfunction.

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


      1. A000VVXE15
        *1 Power switch ON (IG)
        *2 Power switch ON (READY)

        Waveform 1

        Reference
        Terminal No. (Symbols) Tool Setting Condition
        A78-29 (RDY) - A77-7 (E1) 10 V/DIV., 10 msec./DIV. Power switch ON (IG) or ON (READY)

  4. CHECK STEERING LOCK ECU

    A000VMNE04

    1. Disconnect the L33 steering lock ECU connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L33-7 (B) - Body ground P - Body ground +B power supply Always 11 to 14 V
      L33-6 (IG2) - Body ground L - Body ground Ignition power supply Power switch ON (IG) 11 to 14 V
      L33-6 (IG2) - Body ground L - Body ground Ignition power supply Power switch OFF Below 1 V
      L33-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L33-2 (SGND) - Body ground BR - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the L33 steering lock ECU connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L33-4 (SLP1) - L33-1 (GND) LG - W-B Steering lock actuator position signal Steering is locked 11 to 14 V
      L33-4 (SLP1) - L33-1 (GND) LG - W-B Steering lock actuator position signal Steering is released Below 1 V

      If the result is not as specified, the ECU may have a malfunction.