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Terminals Of Ecu

  1. CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH) 
    Fig 1: Identifying Main Body ECU (Cowl Side Junction Block LH)
    G05639727Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the DA, DD, DF, L12 and L13 ECU connectors.
    2. Measure the resistance and voltage according to value(s) in the table below.
      TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

      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 off Below 1 V
      Engine switch on (ACC) 11 to 14 V
      E1-6 (AM1) - 2D-62 (GND2) W - W-B Battery power supply Always 11 to 14 V
      E2-1 (AM2) - 2D-62 (GND2) W - W-B Battery power supply Always 11 to 14 V
      2A-1 (IG) - 2D-62 (GND2) B - W-B IG power supply Engine switch off Below 1 V
      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 DA, DD, DF, L12 and L3 ECU connectors.
    4. Measure the voltage according to the value(s) in the table below.
      TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      E1-24 (DCTY) - Body ground L - Body ground Driver side door courtesy light switch input Driver side courtesy switch on Below 1 V
      Engine switch off, and driver side door courtesy switch off Pulse generation (refer to  ewaveform 1 and  f2)
      E2-21 (PCTY) - Body ground Y - Body ground Front passenger side door courtesy light switch input Front Passenger side courtesy switch on Below 1 V
      Engine switch off, and passenger side door courtesy switch off Pulse generation (refer to  gwaveform 3 and  h4)
      2C-2 (LCTY) - Body ground W - Body ground Rear side door LH courtesy light switch input Rear side door LH courtesy switch on Below 1 V
      Engine switch off, and rear side door LH courtesy switch off Pulse generation (refer to  iwaveform 5 and  j6)
      E2-7 (RCTY) - Body ground G - Body ground Rear side door RH courtesy light switch input Rear side door RH courtesy switch on Below 1 V
      Engine switch off, and rear side door RH courtesy switch off Pulse generation (refer to  kwaveform 7 and  l8)
      E2-25 (BCTY) - Body ground w - Body ground Back door courtesy light switch input Back door closed Below 1 V
      Engine switch off, and back door courtesy switch off Pulse generation (refer to  mwaveform 9 and  n10)
      E3-4 (HAZ) - Body ground O - Body ground Turn signal light drive Hazard warning signal switch on Pulse generation
      Hazard warning signal switch off Below 1 V
      2B-16 (DIM) - 2D-62 (GND2) R-G - W-B Headlight low drive Headlight dimmer switch low 11 to 14 V
      2B-18 (HRLY) - 2D-62 (GND2) L - W-B Headlight (high) drive Headlight dimmer switch high 11 to 14 V
      2A-1 (TRLY) - 2D-62 (GND2) B - W-B Taillight drive Headlight dimmer switch tail 11 to 14 V

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

    5. Using an oscilloscope, check waveform 1.

      Waveform 1 (Reference) 

      WAVEFORM 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
      Fig 2: Identifying Waveform 1
      G05639684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check waveform 2

      Waveform 2 (Reference) 

      WAVEFORM 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
      Fig 3: Identifying Waveform 2
      G05639691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Using an oscilloscope, check waveform 3

      Waveform 3 (Reference) 

      WAVEFORM 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
      Fig 4: Identifying Waveform 3
      G05639686Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Using an oscilloscope, check waveform 4.

      Waveform 4 (Reference) 

      WAVEFORM 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
      Fig 5: Identifying Waveform 4
      G05639687Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. Using an oscilloscope, check waveform 5.

      Waveform 5 (Reference) 

      WAVEFORM 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 side door LH courtesy switch off
      Fig 6: Identifying Waveform 5
      G05639684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    10. Using an oscilloscope, check waveform 6.

      Waveform 6 (Reference) 

      WAVEFORM 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 side door LH courtesy switch off
      Fig 7: Identifying Waveform 6
      G05639691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    11. Using an oscilloscope, check waveform 7.

      Waveform 7 (Reference) 

      WAVEFORM 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 side door RH courtesy switch off
      Fig 8: Identifying Waveform 7
      G05639684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    12. Using an oscilloscope, check waveform 8.

      Waveform 8 (Reference) 

      WAVEFORM 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 side door RH courtesy switch off
      Fig 9: Identifying Waveform 8
      G05639691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    13. Using an oscilloscope, check waveform 9.

      Waveform 9 (Reference) 

      WAVEFORM 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
      Fig 10: Identifying Waveform 9
      G05639684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    14. Using an oscilloscope, check waveform 10.

    Waveform 10 (Reference) 

    WAVEFORM 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
    Fig 11: Identifying Waveform 10
    G05639691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    Fig 12: Identifying Certification ECU (Smart Key ECU Assembly) Connector Terminals
    G05765307Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E29 and E30 ECU connectors.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

      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 DESCRIPTION SPECIFIED CONDITION CHART

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    E29-39 (RSSI) - E29-17 (E) L - W-B Door control receiver output signal Engine switch off, all doors closed and transmitter switch not pressed 11 to 14 V
    Engine switch off, all doors closed and transmitter switch pressed Below 1 V
    E29-38 (RDA) - E29-17 (E) LG - W-B Door control receiver output signal Engine switch off, all doors closed and transmitter switch not pressed → switch pressed → switch not pressed 4 6 to 5 4 V → Below 2 V → 4 6 to 5 4 V
    E29-29 (RCO) - E29-17 (E) B - W-B Supply battery to door control receiver Engine switch off, all doors closed and transmitter switch pressed 4 6 to 5 4 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

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

  3. CHECK DOOR CONTROL RECEIVER 
    Fig 13: Identifying Door Control Receiver Connector Terminals
    G05639739Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L21 receiver connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    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) 
    Fig 14: Identifying Power Back Door Unit (W/ Power Back Door System) Connector Terminals
    G05765309Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L36 unit connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L36-11 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L36-10 (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 L36 unit connector.
    4. Measure the voltage according to the value(s) in the table below.
    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    L36-26 (BZR+) - Body ground L - Body ground Power back door warning buzzer signal Back door warning buzzer is sounding 11 to 14 V (pulse generation)
    L36-26 (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.

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