CHARGING SYSTEM TERMINALS OF ECU


  1. CHECK POWER MANAGEMENT CONTROL ECU (w/ Entry and Start System)

    A00DT13E01

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

      Tech Tips

      Perform the measurements with the connectors connected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D75-1 (AM22) - Body ground W Battery Always 9.5 to 16 V
      D75-2 (AM21) - Body ground W Battery Always 9.5 to 16 V
      D76-10 (RLO) - D76-25 (E2) V - BR Generator signal Engine warmed up, charging control operating, vehicle driven at constant speed

      Pulse generation

      (See waveform 1)
      Engine warmed up, charging control operating, vehicle accelerating

      Pulse generation

      (See waveform 2)
      Engine warmed up, charging control operating, vehicle decelerating

      Pulse generation

      (See waveform 3)
      D76-23 (VC) - D76-25 (E2) LG - BR Battery current sensor power supply Ignition switch ON 4.5 to 5.5 V
      D76-28 (THB) - D76-25 (E2) P - BR Battery current sensor thermistor signal Ignition switch ON 0.2 to 4.8 V
      D76-30 (IB) - D76-25 (E2) B - BR Battery current sensor signal

      Ignition switch ON

      (Temperature of thermistor of battery current sensor: -30 to 90°C (-86 to 194°F))

      		 0.2 to 4.8 V
      D76-25 (E2) - Body ground BR Battery current sensor ground Always Below 1 Ω

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

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

      Tech Tips

      The oscilloscope waveform shown in the illustration is an example for reference only. Waveforms with noise or chattering are not shown.


      1. A00DRJ0E04

        Waveform 1

        Tech Tips

        As the duty cycle changes in accordance with the electrical load and battery condition, the output waveform also changes.

      2. A00DU6QE03

        Waveform 2

        3. Tech Tips

        As the duty cycle changes in accordance with the electrical load and battery condition, the output waveform also changes.

      3. A00DTEVE03

        Waveform 3

        4. Tech Tips

        As the duty cycle changes in accordance with the electrical load and battery condition, the output waveform also changes.

      4. CHECK POWER MANAGEMENT CONTROL ECU (w/o Entry and Start System)

        A00DSC5E01

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

          Tech Tips

          Perform the measurements with the connectors connected.

        5. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
        D104-8 (AM21) - Body ground W Battery Always 9.5 to 16 V
        D105-14 (RLO) - D105-18 (E2) V - BR Generator signal Engine warmed up, charging control operating, vehicle driven at constant speed

        Pulse generation

        (See waveform 1)
        Engine warmed up, charging control operating, vehicle accelerating

        Pulse generation

        (See waveform 2)
        Engine warmed up, charging control operating, vehicle decelerating

        Pulse generation

        (See waveform 3)
        D105-12 (VC) - D105-18 (E2) LG - BR Battery current sensor power supply Ignition switch ON 4.5 to 5.5 V
        D105-15 (THB) - D105-18 (E2) P - BR Battery current sensor thermistor signal Ignition switch ON 0.2 to 4.8 V
        D105-13 (IB) - D105-18 (E2) B - BR Battery current sensor signal

        Ignition switch ON

        (Temperature of thermistor of battery current sensor: -30 to 90°C (-86 to 194°F))

        		 0.2 to 4.8 V
        D105-18 (E2) - Body ground BR Battery current sensor ground Always Below 1 Ω

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

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

        Tech Tips

        The oscilloscope waveform shown in the illustration is an example for reference only. Waveforms with noise or chattering are not shown.


        1. A00DRJ0E04

          Waveform 1

          Tech Tips

          As the duty cycle changes in accordance with the electrical load and battery condition, the output waveform also changes.

        2. A00DU6QE03

          Waveform 2

          3. Tech Tips

          As the duty cycle changes in accordance with the electrical load and battery condition, the output waveform also changes.

        3. A00DTEVE03

          Waveform 3

          4. Tech Tips

          As the duty cycle changes in accordance with the electrical load and battery condition, the output waveform also changes.