POWER BACK DOOR SYSTEM TERMINALS OF ECU


  1. CHECK POWER BACK DOOR UNIT

    A01ERGSE09

    1. Disconnect the L36 unit connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L36-10 (ECUB) - Body ground R - Body ground ECUB power supply Always 11 to 14 V
      L36-12 (B) - Body ground B - Body ground Power supply Always 11 to 14 V
      L36-8 (IG) - Body ground G - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      L36-8 (IG) - Body ground G - Body ground IG power supply Engine switch off Below 1 V
      L36-15 (OSL) - L36-14 (OSE) G - BE Power back door sensor LH circuit Power back door sensor LH not pressed Approximately 1 kΩ
      L36-15 (OSL) - L36-14 (OSE) G - BE Power back door sensor LH circuit Power back door sensor LH pressed Below 100 Ω
      L36-13 (OSR) - L36-14 (OSE) P - BE Power back door sensor RH circuit Power back door sensor RH not pressed Approximately 1 kΩ
      L36-13 (OSR) - L36-14 (OSE) P - BE Power back door sensor RH circuit Power back door sensor RH pressed Below 100 Ω
      L36-11 (GND) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      L36-17 (MSW) - Body ground G - Body ground Power back door main switch signal circuit Power back door main switch not pushed (on) Below 1 Ω
      L36-17 (MSW) - Body ground G - Body ground Power back door main switch signal circuit Power back door main switch pushed (off) 10 kΩ or higher
      L36-4 (DS1) - Body ground R - Body ground Back door control switch signal circuit Back door control switch on Below 1 Ω
      L36-4 (DS1) - Body ground R - Body ground Back door control switch signal circuit Back door control switch off 10 kΩ or higher

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

    3. Reconnect the L36 unit connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L36-26 (BZR+) - Body ground L - Body ground Power back door warning buzzer signal input Power back door warning buzzer is sounding

      Pulse generation

      (see waveform 1)
      L36-26 (BZR+) - Body ground L - Body ground Power back door warning buzzer signal input Power back door warning buzzer is stopped Below 1 V
      L36-2 (DC+) - L36-1 (DC-) R - B Power back door lock motor circuit Power back door lock motor is operating 11 to 14 V
      L36-2 (DC+) - L36-1 (DC-) R - B Power back door lock motor circuit Power back door lock motor is stopped Below 1 V
      L36-17 (MSW) - Body ground G - Body ground Power back door main switch signal circuit Power back door main switch not pushed (on) Below 1 V
      L36-17 (MSW) - Body ground G - Body ground Power back door main switch signal circuit Power back door main switch pushed (off)

      Pulse generation

      (see waveform 2)
      L36-20 (FUL) - Body ground W - Body ground Back door courtesy switch signal circuit Back door is opened Below 1 V
      L36-20 (FUL) - Body ground W - Body ground Back door courtesy switch signal circuit Back door is closed

      Pulse generation

      (see waveform 3)
      L36-4 (DS1) - Body ground R - Body ground Back door control switch signal circuit Back door control switch on Below 1 V
      L36-4 (DS1) - Body ground R - Body ground Back door control switch signal circuit Back door control switch off

      Pulse generation

      (see waveform 4)
      L36-22 (HAF) - Body ground G - Body ground Back door lock half-latch switch signal circuit Back door is opened Below 1 V
      L36-22 (HAF) - Body ground G - Body ground Back door lock half-latch switch signal circuit Back door is closed

      Pulse generation

      (see waveform 5)
      L36-24 (POS) - Body ground B - Body ground Back door lock position switch signal circuit Back door is closed Below 1 V
      L36-24 (POS) - Body ground B - Body ground Back door lock position switch signal circuit Back door is opened

      Pulse generation

      (see waveform 6)
      L36-23 (CYLH) - Body ground G - Body ground Lower tail gate courtesy switch LH circuit Lower tail gate is opened Below 1 V
      L36-23 (CYLH) - Body ground G - Body ground Lower tail gate courtesy switch LH circuit Lower tail gate is closed

      Pulse generation

      (see waveform 7)
      L36-7 (CYRH) - Body ground P - Body ground Lower tail gate courtesy switch RH circuit Lower tail gate is opened Below 1 V
      L36-7 (CYRH) - Body ground P - Body ground Lower tail gate courtesy switch RH circuit Lower tail gate is closed

      Pulse generation

      (see waveform 8)

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

    5. A01EPFXE01

      Using an oscilloscope, check waveform 1.

      Waveform 1 (Reference)
      Item Content
      Terminal (Symbol) L36-26 (BZR+) - Body ground
      Tool Setting 5 V/DIV., 1 ms/DIV
      Condition Power back door warning buzzer is sounding
    6. A01EMU5E01

      Using an oscilloscope, check waveform 2.

      Waveform 2 (Reference)
      Item Content
      Terminal (Symbol) L36-17 (MSW) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Power back door main switch pushed (OFF)
    7. A01EPFXE01

      Using an oscilloscope, check waveform 3.

      Waveform 3 (Reference)
      Item Content
      Terminal (Symbol) L36-20 (FUL) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Back door is closed
    8. A01EPFXE01

      Using an oscilloscope, check waveform 4.

      Waveform 4 (Reference)
      Item Content
      Terminal (Symbol) L36-4 (DS1) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Back door control switch off
    9. A01EPFXE01

      Using an oscilloscope, check waveform 5.

      Waveform 5 (Reference)
      Item Content
      Terminal (Symbol) L36-22 (HAF) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Back door is closed
    10. A01EMU5E01

      Using an oscilloscope, check waveform 6.

      Waveform 6 (Reference)
      Item Content
      Terminal (Symbol) L36-24 (POS) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Back door is opened
    11. A01EMU5E01

      Using an oscilloscope, check waveform 7.

      Waveform 7 (Reference)
      Item Content
      Terminal (Symbol) L36-23 (CYLH) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Lower tail gate is closed
    12. A01EMU5E01

      Using an oscilloscope, check waveform 8.

      Waveform 8 (Reference)
      Item Content
      Terminal (Symbol) L36-7 (CYRH) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Lower tail gate is closed

  2. CHECK MAIN BODY ECU

    A01EOYJE03

    1. Disconnect the 2B, 2D, E2 and E3 ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      2B-20 (BATB) - Body ground L - Body ground Battery power supply Always 11 to 14 V
      2A-1 (ACC) - Body ground B - Body ground ACC power supply Engine switch on (ACC) 11 to 14 V
      2A-1 (ACC) - Body ground B - Body ground ACC power supply Engine switch off Below 1 V
      E2-2 (PBDS) - Body ground R - Body ground Power back door opener/closer switch circuit Power back door opener/closer switch is pushed (on) Below 1 Ω
      E2-2 (PBDS) - Body ground R - Body ground Power back door opener/closer switch circuit Power back door opener/closer switch is not pushed (off) 10 kΩ or higher
      2D-62 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E3-1 (GND3) - Body ground BR - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the 2B, 2D, E2 and E3 ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      E2-2 (PBDS) - Body ground R - Body ground Power back door opener/closer switch circuit Power back door opener/closer switch is pushed (on) Below 1 V
      E2-2 (PBDS) - Body ground R - Body ground Power back door opener/closer switch circuit Power back door opener/closer switch is not pushed (off)

      Pulse generation

      (see waveform)

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

    5. A01EPFXE01

      Using an oscilloscope, check waveform.

      Waveform (Reference)
      Item Content
      Terminal (Symbol) E2-2 (PBDS) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Power back door opener/closer switch is not pushed (off)