POWER BACK DOOR SYSTEM TERMINALS OF ECU


  1. CHECK POWER BACK DOOR UNIT ASSEMBLY (POWER BACK DOOR ECU)

    A01XAFFE02

    1. Disconnect the L52 power back door unit assembly (power back door ECU) 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
      L52-10 (ECUB) - Body ground R - Body ground ECUB power supply Always 11 to 14 V
      L52-12 (B) - Body ground B - Body ground Power supply Always 11 to 14 V
      L52-8 (IG) - Body ground G - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      L52-8 (IG) - Body ground G - Body ground IG power supply Engine switch off Below 1 V
      L52-15 (OSL) - L52-14 (OSE)

      G - BR*1

      G - BE*2

      		 Power back door sensor LH circuit Power back door sensor LH not pressed Approximately 1 kΩ
      L52-15 (OSL) - L52-14 (OSE)

      G - BR*1

      G - BE*2

      		 Power back door sensor LH circuit Power back door sensor LH pressed Below 100 Ω
      L52-13 (OSR) - L52-14 (OSE)

      Y - BR*1

      P - BE*2

      		 Power back door sensor RH circuit Power back door sensor RH not pressed Approximately 1 kΩ
      L52-13 (OSR) - L52-14 (OSE)

      Y - BR*1

      P - BE*2

      		 Power back door sensor RH circuit Power back door sensor RH pressed Below 100 Ω
      L52-11 (GND) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      L52-17 (MSW) - Body ground G - Body ground Power back door main switch signal circuit Power back door main switch not pushed (on) Below 1 Ω
      L52-17 (MSW) - Body ground G - Body ground Power back door main switch signal circuit Power back door main switch pushed (off) 10 kΩ or higher
      L52-4 (DS1) - Body ground R - Body ground Back door control switch signal circuit Back door control switch on Below 1 Ω
      L52-4 (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 L52 power back door unit assembly (power back door ECU) connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L52-26 (BZR+) - Body ground L - Body ground Power back door warning buzzer signal input Power back door warning buzzer sounding

      Pulse generation

      (See waveform 1)
      L52-26 (BZR+) - Body ground L - Body ground Power back door warning buzzer signal input Power back door warning buzzer stopped Below 1 V
      L52-2 (DC+) - L52-1 (DC-) R - B Power back door lock motor circuit Power back door lock motor operating 11 to 14 V
      L52-2 (DC+) - L52-1 (DC-) R - B Power back door lock motor circuit Power back door lock motor stopped Below 1 V
      L52-17 (MSW) - Body ground G - Body ground Power back door main switch signal circuit Power back door main switch not pushed (on) Below 1 V
      L52-17 (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)
      L52-20 (FUL) - Body ground W - Body ground Back door courtesy switch signal circuit Back door opened Below 1 V
      L52-20 (FUL) - Body ground W - Body ground Back door courtesy switch signal circuit Back door closed

      Pulse generation

      (See waveform 3)
      L52-4 (DS1) - Body ground R - Body ground Back door control switch signal circuit Back door control switch on Below 1 V
      L52-4 (DS1) - Body ground R - Body ground Back door control switch signal circuit Back door control switch off

      Pulse generation

      (See waveform 4)
      L52-22 (HAF) - Body ground G - Body ground Back door lock half-latch switch signal circuit Back door opened Below 1 V
      L52-22 (HAF) - Body ground G - Body ground Back door lock half-latch switch signal circuit Back door closed

      Pulse generation

      (See waveform 5)
      L52-24 (POS) - Body ground B - Body ground Back door lock position switch signal circuit Back door closed Below 1 V
      L52-24 (POS) - Body ground B - Body ground Back door lock position switch signal circuit Back door opened

      Pulse generation

      (See waveform 6)
      L52-23 (CYLH) - Body ground G - Body ground Lower tail gate courtesy switch LH circuit Lower tail gate opened Below 1 V
      L52-23 (CYLH) - Body ground G - Body ground Lower tail gate courtesy switch LH circuit Lower tail gate closed

      Pulse generation

      (See waveform 7)
      L52-7 (CYRH) - Body ground

      Y - Body ground*1

      P - Body ground*2

      		 Lower tail gate courtesy switch RH circuit Lower tail gates opened Below 1 V
      L52-7 (CYRH) - Body ground

      Y - Body ground*1

      P - Body ground*2

      		 Lower tail gate courtesy switch RH circuit Lower tail gate closed

      Pulse generation

      (See waveform 8)

      • *1: Model code: GRJ200L-GNANKC, URJ202L-GNTEKC

      • *2: Model code except: GRJ200L-GNANKC, URJ202L-GNTEKC

    5. A01X5A3E01

      Using an oscilloscope, check waveform 1.

      Waveform 1 (Reference)
      Item Content
      Terminal (Symbol) L52-26 (BZR+) - Body ground
      Tool Setting 5 V/DIV., 1 ms/DIV
      Condition Power back door warning buzzer sounding
    6. A01XC0NE01

      Using an oscilloscope, check waveform 2.

      Waveform 2 (Reference)
      Item Content
      Terminal (Symbol) L52-17 (MSW) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Power back door main switch pushed (off)
    7. A01X5A3E01

      Using an oscilloscope, check waveform 3.

      Waveform 3 (Reference)
      Item Content
      Terminal (Symbol) L52-20 (FUL) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Back door closed
    8. A01X5A3E01

      Using an oscilloscope, check waveform 4.

      Waveform 4 (Reference)
      Item Content
      Terminal (Symbol) L52-4 (DS1) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Back door lock control switch off
    9. A01X5A3E01

      Using an oscilloscope, check waveform 5.

      Waveform 5 (Reference)
      Item Content
      Terminal (Symbol) L52-22 (HAF) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Back door closed
    10. A01XC0NE01

      Using an oscilloscope, check waveform 6.

      Waveform 6 (Reference)
      Item Content
      Terminal (Symbol) L52-24 (POS) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Back door opened
    11. A01XC0NE01

      Using an oscilloscope, check waveform 7.

      Waveform 7 (Reference)
      Item Content
      Terminal (Symbol) L52-23 (CYLH) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Lower tail gate closed
    12. A01XC0NE01

      Using an oscilloscope, check waveform 8.

      Waveform 8 (Reference)
      Item Content
      Terminal (Symbol) L52-7 (CYRH) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Lower tail gate closed

  2. CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

    A01X6GUE03

    1. Disconnect the 2A, 2B, 2D, E2 and E3 main body ECU (cowl side junction block LH) 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 Always 11 to 14 V
      E2-2 (PBDS) - Body ground R - Body ground Door control switch circuit Door control switch pushed (on) Below 1 Ω
      E2-2 (PBDS) - Body ground R - Body ground Door control switch circuit Door control switch 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 2A, 2B, 2D, E2 and E3 ECU (cowl side junction block LH) 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 Door control switch circuit Door control switch pushed (on) Below 1 V
      E2-2 (PBDS) - Body ground R - Body ground Door control switch circuit Door control switch not pushed (off)

      Pulse generation

      (See waveform 1 or 2)
    5. A01X2IBE01

      Using an oscilloscope, check waveform.

      Waveform1 (Reference)
      Item Content
      Terminal (Symbol) E2-2 (PBDS) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Door control switch not pushed (off)
    6. A01X1E7E01

      Using an oscilloscope, check waveform.

      Waveform2 (Reference)
      Item Content
      Terminal (Symbol) E2-2 (PBDS) - Body ground
      Tool Setting 5 V/DIV., 10 ms/DIV
      Condition Door control switch not pushed (off)