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

  1. CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    U122431E02

    1. Disconnect the H79, H80, DB, DE and DG 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

      H79-4 (BATB) - Body ground

      BR - Body ground

      Battery power supply

      Always

      11 to 14 V

      DG-1 (ALTB) - Body ground

      W - Body ground

      Battery power supply

      Always

      11 to 14 V

      DB-30 (BECU) - Body ground

      W - Body ground

      Power supply

      Always

      11 to 14 V

      DE-28 (GND1) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

      H80-4 (GND2) - 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 H79, H80, DB, DE and DG ECU connectors.

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

      Table 1. for LHD

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      DA-21 (DCTY) - Body ground

      W - Body ground

      Front door courtesy light switch LH input

      Driver side door open

      Below 1 V

      Driver side door close

      11 to 14 V

      DE-20 (PCTY) - Body ground

      BR - Body ground

      Front door courtesy light switch RH input

      Front passenger side door open

      Below 1 V

      Front passenger side door closed

      11 to 14 V

      H79-8 (LCTY) - Body ground

      SB - Body ground

      Rear door courtesy light switch LH input

      Rear door LH open

      Below 1 V

      Rear door LH closed

      11 to 14 V

      DE-19 (RCTY) - Body ground

      LG - Body ground

      Rear door courtesy light switch RH input

      Rear door RH open

      Below 1 V

      Rear door RH closed

      11 to 14 V

      DA-7 (BCTY) - Body ground

      LG - Body ground

      Back door courtesy light switch input

      Back door open

      Below 1 V

      Back door closed

      11 to 14 V

      H79-25 (LSWD) - Body ground

      Y - Body ground

      Front door lock position switch LH input

      Driver side door unlocked

      Below 1 V

      Engine switch off, all doors closed and driver side door locked

      Pulse generation

      (see waveform 1 or 2)

      H79-10 (LSWP) - Body ground

      LG - Body ground

      Front door lock position switch RH input

      Front passenger side door unlocked

      Below 1 V

      Engine switch off, all doors closed and passenger side door locked

      Pulse generation

      (see waveform 3 or 4)

      H81-10 (LSR) - Body ground

      Y - Body ground

      Rear door lock position switch input

      Rear door unlocked

      Below 1 V

      Engine switch off, all doors closed and rear door locked

      Pulse generation

      (see waveform 5 or 6)

      H81-2 (BZR) - Body ground

      L - Body ground

      Wireless door lock buzzer signal

      Wireless door lock buzzer off

      Below 1 V

      Wireless door lock buzzer on

      Pulse generation
      Table 2. for RHD

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      DC-6 (DCTY) - Body ground

      BR - Body ground

      Front door courtesy light switch RH input

      Driver side door open

      Below 1 V

      Driver side door closed

      11 to 14 V

      DA-24 (PCTY) - Body ground

      W - Body ground

      Front door courtesy light switch LH input

      Front passenger side door open

      Below 1 V

      Front passenger side door closed

      11 to 14 V

      H79-8 (LCTY) - Body ground

      SB - Body ground

      Rear door courtesy light switch LH input

      Rear door LH open

      Below 1 V

      Rear door LH closed

      11 to 14 V

      DE-19 (RCTY) - Body ground

      LG - Body ground

      Rear door courtesy light switch RH input

      Rear door RH open

      Below 1 V

      Rear door RH closed

      11 to 14 V

      DA-7 (BCTY) - Body ground

      LG - Body ground

      Back door courtesy light switch input

      Back door open

      Below 1 V

      Back door closed

      11 to 14 V

      H79-25 (LSWD) - Body ground

      LG - Body ground

      Front door lock position switch RH input

      Driver side door unlocked

      Below 1 V

      Engine switch off, all doors closed and driver side door locked

      Pulse generation

      (see waveform 1 or 2)

      H79-10 (LSWP) - Body ground

      LG - Body ground

      Front door lock position switch LH input

      Front passenger side door unlocked

      Below 1 V

      Engine switch off, all doors closed and passenger side door locked

      Pulse generation

      (see waveform 3 or 4)

      H81-10 (LSR) - Body ground

      Y - Body ground

      Rear door lock position switch input

      Rear door unlocked

      Below 1 V

      Engine switch off, all doors closed and rear door locked

      Pulse generation

      (see waveform 5 or 6)

      H81-2 (BZR) - Body ground

      L - Body ground

      Wireless door lock buzzer signal

      Wireless door lock buzzer off

      Below 1 V

      Wireless door lock buzzer on

      Pulse generation

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

    5. B122376E12

      Using an oscilloscope, check waveform 1.

      Table 3. Waveform 1 (Reference)

      Item

      Content

      Terminal No. (Symbol)

      H79-25 (LSWD) - Body ground

      Tool Setting

      5 V/DIV., 20 ms/DIV.

      Condition

      Engine switch off, all doors closed and driver side door locked
    6. B129408E12

      Using an oscilloscope, check waveform 2.

      Table 4. Waveform 2 (Reference)

      Item

      Content

      Terminal No. (Symbol)

      H79-25 (LSWD) - Body ground

      Tool Setting

      5 V/DIV., 20 ms/DIV.

      Condition

      Engine switch off, all doors closed and driver side door locked
    7. B122376E12

      Using an oscilloscope, check waveform 3.

      Table 5. Waveform 3 (Reference)

      Item

      Content

      Terminal No. (Symbol)

      H79-10 (LSWP) - Body ground

      Tool Setting

      5 V/DIV., 20 ms/DIV.

      Condition

      Engine switch off, all doors closed and passenger side door locked
    8. B129408E12

      Using an oscilloscope, check waveform 4.

      Table 6. Waveform 4 (Reference)

      Item

      Content

      Terminal No. (Symbol)

      H79-10 (LSWP) - Body ground

      Tool Setting

      5 V/DIV., 20 ms/DIV.

      Condition

      Engine switch off, all doors closed and passenger side door locked
    9. B122376E12

      Using an oscilloscope, check waveform 5.

      Table 7. Waveform 5 (Reference)

      Item

      Content

      Terminal No. (Symbol)

      H81-10 (LSR) - Body ground

      Tool Setting

      5 V/DIV., 20 ms/DIV.

      Condition

      Engine switch off, all doors closed and rear door locked
    10. B129408E12

      Using an oscilloscope, check waveform 6.

      Table 8. Waveform 6 (Reference)

      Item

      Content

      Terminal No. (Symbol)

      H81-10 (LSR) - Body ground

      Tool Setting

      5 V/DIV., 20 ms/DIV.

      Condition

      Engine switch off, all doors closed and rear door locked

  2. CHECK CERTIFICATION ECU

    U122389E02

    1. Disconnect the H51 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

      H51-1 (+B) - H51-15 (E)

      W - W-B

      +B power supply

      Always

      11 to 14 V

      H51-15 (E) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

      H51-16 (IG) - H51-15 (E)

      L - W-B

      IG power supply

      Engine switch off → Engine switch on (IG)

      Below 1 V → 11 to 14 V

      H51-17 (CUTB) - H51-15 (E)

      W - W-B

      +B power supply

      Always

      11 to 14 V

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

    3. Reconnect the H51 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

      H55-5 (RCO) - H51-15 (E)

      V - W-B

      Door control receiver power source

      Engine switch off, all doors closed and transmitter switch not pressed → pressed

      Below 1 V → 4.5 to 5.5 V

      H55-15 (RDA) - H51-15 (E)

      Y - W-B

      Door control receiver data input signal

      Engine switch off

      11 to 14 V pulse generation at regular intervals

      H55-16 (RSSI) - H51-15 (E)

      L - W-B

      Door control receiver electric wave existence signal

      All doors locked, all doors closed and transmitter switch not pressed → pressed

      11 to 14 V → Below 2 V

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