WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Entry and Start System) TERMINALS OF ECU


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

    A01558IE06

    1. Disconnect the 2A, 2D and E3 ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      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
      2A-1 (ACC) - 2D-62 (GND2) B - W-B ACC power supply Engine switch on (ACC) 11 to 14 V
      2A-1 (IG) - 2D-62 (GND2) B - W-B IG power supply Engine switch on (IG) 11 to 14 V

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

    3. Reconnect the 2A, 2D 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
      E1-24 (DCTY) - Body ground

      L - Body ground*1

      Y - Body ground*2

      		 Driver side door courtesy light switch input Driver side door open Below 1 Ω
      Driver side door closed 10 kΩ or higher
      E2-21 (PCTY) - Body ground

      Y - Body ground*1

      L - Body ground*2

      		 Passenger side door courtesy light switch input Passenger side door open Below 1 Ω
      Passenger side door closed 10 kΩ or higher
      2C-2 (LCTY) - Body ground W - Body ground Rear side door LH courtesy light switch input Rear side door LH open Below 1 Ω
      Rear side door LH closed 10 kΩ or higher
      E2-7 (RCTY) - Body ground G - Body ground Rear side door RH courtesy light switch input Rear side door RH open Below 1 Ω
      Rear side door RH closed 10 kΩ or higher
      E2-25 (BCTY) - Body ground W - Body ground Back door courtesy light switch input Back door open Below 1 Ω
      Back door closed 10 kΩ or higher
      E3-7 (HZSW) - Body ground*4 BE - Body ground Turn signal light drive Hazard warning signal switch on Pulse generation
      Hazard warning signal switch off Below 1 V
      E2-15 (DIM) - 2D-62 (GND2)*3 L - W-B Headlight low drive Headlight dimmer switch low 11 to 14 V
      2B-18 (HRLY) - 2D-62 (GND2)*3 L - W-B Headlight (high) drive Headlight dimmer switch high 11 to 14 V
      2A-1 (TRLY) - 2D-62 (GND2)*3 B - W-B Taillight drive Headlight dimmer switch tail 11 to 14 V

      • *1: for LHD

      • *2: for RHD

      • *3: w/ Panic Switch

      • *4: for GRJ200L-GNANKC, URJ202L-GNTEKC

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

    5. A015AHFE01

      Using an oscilloscope, check waveform 1.

      Waveform 1 (Reference)
      Item Content
      Terminal No. (Symbol) E1-24 (DCTY) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, and driver side door courtesy switch off
    6. A015CN0E01

      Using an oscilloscope, check waveform 2.

      Waveform 2 (Reference)
      Item Content
      Terminal No. (Symbol) E1-24 (DCTY) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, and driver side door courtesy switch off
    7. A015BALE01

      Using an oscilloscope, check waveform 3.

      Waveform 3 (Reference)
      Item Content
      Terminal No. (Symbol) E2-21 (PCTY) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, and passenger side door courtesy switch off
    8. A015893E01

      Using an oscilloscope, check waveform 4.

      Waveform 4 (Reference)
      Item Content
      Terminal No. (Symbol) E2-21 (PCTY) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, and passenger side door courtesy switch off
    9. A015AHFE01

      Using an oscilloscope, check waveform 5.

      Waveform 5 (Reference)
      Item Content
      Terminal No. (Symbol) 2C-2 (LCTY) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, and rear LH side door courtesy switch off
    10. A015CN0E01

      Using an oscilloscope, check waveform 6.

      Waveform 6 (Reference)
      Item Content
      Terminal No. (Symbol) 2C-2 (LCTY) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, and rear LH side door courtesy switch off
    11. A015AHFE01

      Using an oscilloscope, check waveform 7.

      Waveform 7 (Reference)
      Item Content
      Terminal No. (Symbol) E2-7 (RCTY) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, and rear RH side door courtesy switch off
    12. A015CN0E01

      Using an oscilloscope, check waveform 8.

      Waveform 8 (Reference)
      Item Content
      Terminal No. (Symbol) E2-7 (RCTY) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, and rear RH side door courtesy switch off
    13. A015AHFE01

      Using an oscilloscope, check waveform 9.

      Waveform 9 (Reference)
      Item Content
      Terminal No. (Symbol) E2-25 (BCTY) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, and Back door closed
    14. A015CN0E01

      Using an oscilloscope, check waveform 10.

      Waveform 10 (Reference)
      Item Content
      Terminal No. (Symbol) E2-25 (BCTY) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, and Back door closed

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A01574SE46

    1. Disconnect the E29 and E30 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
      E29-17 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E29-1 (+B) - E29-17 (E) B - W-B Battery power supply Always 11 to 14 V
      E29-18 (IG) - E29-17 (E) B - W-B IG power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

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

    3. Reconnect the E29 and E30 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
      E29-39 (RSSI) - E29-17 (E) L - W-B Door control receiver electric wave existence signal Engine switch off, all doors closed and transmitter switch not pressed → pressed 11 to 14 V → Below 1 V
      E29-38 (RDA) - E29-17 (E) LG - W-B Door control receiver data input signal Engine switch off, all doors closed and transmitter switch not pressed → pressed Below 1 V → 11 to 14 V → Below 1 V
      E29-29 (RCO) - E29-17 (E) B - W-B Door control receiver power source Engine switch off, all doors closed and transmitter switch not pressed → pressed Below 1 V → 4.6 to 5.4 V → Below 1 V
      E29-21 (BZR) - Body ground* LG - Body ground Wireless door lock buzzer output Wireless door lock buzzer ON 11 to 14 V
      E29-21 (BZR) - Body ground* LG - Body ground Wireless door lock buzzer output Wireless door lock buzzer OFF Below 1 V

      Tech Tips

      *: Except Europe and China


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

  3. CHECK DOOR CONTROL RECEIVER

    A015AA1E01

    1. Disconnect the L21 receiver connector.

    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
      L21-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L21-4 (+5) - Body ground B - Body ground Battery power supply Always 4.6 to 5.4 V

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

  4. CHECK POWER BACK DOOR UNIT (w/ Power Back Door System)

    A015ADRE30

    1. Disconnect the L52 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
      L52-11 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L52-10 (ECUB) - Body ground R - Body ground Battery power supply Always 11 to 14 V

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

    3. Reconnect the L52 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
      L52-26 (BZR+) - Body ground L - Body ground Power back door warning buzzer signal Back door warning buzzer is sounding

      11 to 14 V

      Pulse generation
      L52-26 (BZR+) - Body ground L - Body ground Power back door warning buzzer signal Back door warning buzzer is stopped Below 1 V

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