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Terminals Of Ecu

  1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    Fig 1: Multiplex Network Body ECU Connector Terminal Identification
    GTY285219Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the main body ECU (multiplex network body ECU). Refer to REMOVAL .
    2. Measure the voltage and resistance according to the value(s) in the table below.

      HINT: 

      Measure the values on the wire harness side with the connector disconnected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A-30 (BECU) - Body ground - Battery power supply Always 11 to 14 V
      A-31 (ALTB) - Body ground - Battery power supply Always 11 to 14 V
      A-32 (IG) - Body ground - Engine switch power supply Engine switch on (IG) 11 to 14 V
      A-32 (IG) - Body ground - Engine switch power supply Engine switch off Below 1 V
      A-29 (ACC) - Body ground - ACC power supply Engine switch on (ACC) 11 to 14 V
      A-29 (ACC) - Body ground - ACC power supply Engine switch off Below 1 V
      A-11 (GND1) - Body ground - Ground Always Below 1 Ω
      G46-3 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Install the main body ECU (multiplex network body ECU). Refer to REMOVAL .
    4. Measure the voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      2H-27 (FLCY) - Body ground R - Body ground Front door LH courtesy light switch input Front door LH open Below 1 V
      2H-27 (FLCY) - Body ground R - Body ground Front door LH courtesy light switch input Front door LH closed 11 to 14 V
      2D-15 (FRCY) - Body ground B - Body ground Front door RH courtesy light switch input Front door RH open Below 1 V
      2D-15 (FRCY) - Body ground B - Body ground Front door RH courtesy light switch input Front door RH closed 11 to 14 V
      G48-3 (LCTY) - Body ground V - Body ground Rear door LH courtesy light switch input Rear door LH open Below 1 V
      G48-3 (LCTY) - Body ground V - Body ground Rear door LH courtesy light switch input Rear door LH closed 11 to 14 V
      G47-6 (RCTY) - Body ground R - Body ground Rear door RH courtesy light switch input Rear door RH open Below 1 V
      G47-6 (RCTY) - Body ground R - Body ground Rear door RH courtesy light switch input Rear door RH closed 11 to 14 V
      G47-9 (L1) - Body ground GR - Body ground Front passenger side door control switch lock input Door control switch on Below 1 V
      G47-9 (L1) - Body ground GR - Body ground Front passenger side door control switch lock input Door control switch off Pulse generation (See waveform 1 or 2)
      G47-10 (UL1) - Body ground LG - Body ground Front passenger side door control switch unlock input Door control switch on Below 1 V
      G47-10 (UL1) - Body ground LG - Body ground Front passenger side door control switch unlock input Door control switch off Pulse generation (See waveform 3 or 4)
      G47-19 (BCTY) - Body ground G - Body ground Back door courtesy light switch input Back door open Below 1 V
      G47-19 (BCTY) - Body ground G - Body ground Back door courtesy light switch input Engine switch off, all doors closed and back door closed Pulse generation (See waveform 5 or 6)
      G47-11 (L2) - Body ground GR - Body ground Driver side door key-linked lock input Driver side door key cylinder in lock position Below 1 V
      G47-11 (L2) - Body ground GR - Body ground Driver side door key-linked lock input Engine switch off, all doors closed and driver side door key cylinder in neutral position Pulse generation (See waveform 7 or 8)
      G47-24 (UL3) - Body ground LG - Body ground Driver side door key-linked unlock input Driver side door key cylinder in unlock position Below 1 V
      G47-24 (UL3) - Body ground LG - Body ground Driver side door key-linked unlock input Engine switch off, all doors closed and driver side door key cylinder in neutral position Pulse generation (See waveform 9 or 10)
      2D-3 (ACT+) - Body ground L - Body ground Door lock motor lock drive output (except rear LH side) Driver side door control switch not pushed and driver side door key cylinder in neutral position Below 1 V
      2D-3 (ACT+) - Body ground L - Body ground Door lock motor lock drive output (except rear LH side) Lock side of driver side door control switch pushed or driver side door key cylinder in lock position 11 to 14 V
      2H-8 (ACT+) - Body ground L - Body ground Door lock motor lock drive output (for rear LH side) Driver side door control switch not pushed and driver side door key cylinder in neutral position Below 1 V
      2H-8 (ACT+) - Body ground L - Body ground Door lock motor lock drive output (for rear LH side) Lock side of driver side door control switch pushed or driver side door key cylinder in lock position 11 to 14 V
      2D-1 (ACTD) - Body ground G - Body ground Driver side door lock motor unlock drive output Driver side door control switch not pushed and driver side door key cylinder in neutral position Below 1 V
      2D-1 (ACTD) - Body ground G - Body ground Driver side door lock motor unlock drive output Unlock side of driver side door control switch pushed or driver side door key cylinder in unlock position 11 to 14 V
      2D-2 (ACT-) - Body ground W - Body ground Door lock motor unlock drive output (for front RH, rear RH and back door side) Driver side door control switch not pushed and driver side door key cylinder in neutral position Below 1 V
      2D-2 (ACT-) - Body ground W - Body ground Door lock motor unlock drive output (for front RH, rear RH and back door side) Unlock side of driver side door control switch pushed or driver side door key cylinder in unlock position 11 to 14 V
      2H-10 (ACT-) - Body ground W - Body ground Door lock motor unlock drive output (for rear LH side) Driver side door control switch not pushed and driver side door key cylinder in neutral position Below 1 V
      2H-10 (ACT-) - Body ground W - Body ground Door lock motor unlock drive output (for rear LH side) Unlock side of driver side door control switch pushed or driver side door key cylinder in unlock position 11 to 14 V
      G47-7 (LSFL) - Body ground G - Body ground Front door LH lock position switch input Front door LH unlocked Below 1 V
      G47-7 (LSFL) - Body ground G - Body ground Front door LH lock position switch input Engine switch off, all doors closed and front door LH locked Pulse generation (See waveform 11 or 12)
      G47-18 (LSFR) - Body ground G - Body ground Front door RH lock position switch input Front door RH unlocked Below 1 V
      G47-18 (LSFR) - Body ground G - Body ground Front door RH lock position switch input Engine switch off, all doors closed and front door RH locked Pulse generation (See waveform 13 or 14)
      2H-25 (LSWL) - Body ground B - Body ground Rear door LH lock position switch input Rear door LH unlocked Below 1 V
      2H-25 (LSWL) - Body ground B - Body ground Rear door LH lock position switch input Engine switch off, all doors closed and rear door LH locked Pulse generation (See waveform 15 or 16)
      G46-2 (LSWR) - Body ground V - Body ground Rear door RH lock position switch input Rear door RH unlocked Below 1 V
      G46-2 (LSWR) - Body ground V - Body ground Rear door RH lock position switch input Engine switch off, all doors closed and rear door RH locked Pulse generation (See waveform 17 or 18)
      G48-13 (LSWB) - Body ground SB - Body ground Back door lock position switch input Back door lock unlocked Below 1 V
      G48-13 (LSWB) - Body ground SB - Body ground Back door lock position switch input Engine switch off, all doors closed and back door locked Pulse generation (See waveform 19 or 20)
      2A-25 (GSW) - Body ground B - Body ground Center airbag sensor signal Engine switch on (IG) with the center airbag sensor assembly connector disconnected 4.5 to 5.5 V

      If the result is not as specified, the main body ECU (multiplex network body ECU) or driver side junction block assembly may have a malfunction.

    5. Using an oscilloscope, check waveform 1.
      Fig 2: Identifying Waveform Reference 1
      GTY223996Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 1 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G47-9 (L1) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Door control switch off
    6. Using an oscilloscope, check waveform 2.
      Fig 3: Identifying Waveform Reference 2
      GTY218794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 2 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G47-9 (L1) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Door control switch off
    7. Using an oscilloscope, check waveform 3.
      Fig 4: Identifying Waveform Reference 3
      GTY223996Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 3 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G47-10 (UL1) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Door control switch off
    8. Using an oscilloscope, check waveform 4.
      Fig 5: Identifying Waveform Reference 4
      GTY218794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 4 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G47-10 (UL1) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Door control switch off
    9. Using an oscilloscope, check waveform 5.
      Fig 6: Identifying Waveform Reference 5
      GTY223996Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 5 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G47-19 (BCTY) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, all doors closed and back door closed
    10. Using an oscilloscope, check waveform 6.
      Fig 7: Identifying Waveform Reference 6
      GTY218794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 6 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G47-19 (BCTY) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, all doors closed and back door closed
    11. Using an oscilloscope, check waveform 7.
      Fig 8: Identifying Waveform Reference 7
      GTY220369Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 7 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G47-11 (L2) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, all doors closed and front door key cylinder in neutral position
    12. Using an oscilloscope, check waveform 8.
      Fig 9: Identifying Waveform Reference 8
      GTY222650Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 8 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G47-11 (L2) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, all doors closed and front door key cylinder in neutral position
    13. Using an oscilloscope, check waveform 9.
      Fig 10: Identifying Waveform Reference 9
      GTY223996Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 9 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G47-24 (UL3) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, all doors closed and driver side door key cylinder in neutral position
    14. Using an oscilloscope, check waveform 10.
      Fig 11: Identifying Waveform Reference 10
      GTY218794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 10 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G47-24 (UL3) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, all doors closed and driver side door key cylinder in neutral position
    15. Using an oscilloscope, check waveform 11.
      Fig 12: Identifying Waveform Reference 11
      GTY223996Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 11 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G47-7 (LSFL) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, all doors closed and front door LH locked
    16. Using an oscilloscope, check waveform 12.
      Fig 13: Identifying Waveform Reference 12
      GTY218794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 12 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G47-7 (LSFL) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, all doors closed and front door LH locked
    17. Using an oscilloscope, check waveform 13.
      Fig 14: Identifying Waveform Reference 13
      GTY223996Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 13 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G47-18 (LSFR) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, all doors closed and front door RH locked
    18. Using an oscilloscope, check waveform 14.
      Fig 15: Identifying Waveform Reference 14
      GTY218794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 14 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G47-18 (LSFR) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, all doors closed and front door RH locked
    19. Using an oscilloscope, check waveform 15.
      Fig 16: Identifying Waveform Reference 15
      GTY223996Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 15 (REFERENCE)

      Item Content
      Terminal No. (Symbol) 2H-25 (LSWL) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, all doors closed and rear door LH locked
    20. Using an oscilloscope, check waveform 16.
      Fig 17: Identifying Waveform Reference 16
      GTY218794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 16 (REFERENCE)

      Item Content
      Terminal No. (Symbol) 2H-25 (LSWL) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, all doors closed and rear door LH locked
    21. Using an oscilloscope, check waveform 17.
      Fig 18: Identifying Waveform Reference 17
      GTY220369Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 17 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G46-2 (LSWR) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, all doors closed and rear door RH locked
    22. Using an oscilloscope, check waveform 18.
      Fig 19: Identifying Waveform Reference 18
      GTY222650Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 18 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G46-2 (LSWR) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, all doors closed and rear door RH locked
    23. Using an oscilloscope, check waveform 19.
      Fig 20: Identifying Waveform Reference 19
      GTY223996Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 19 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G48-13 (LSWB) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, all doors closed and back door locked
    24. Using an oscilloscope, check waveform 20.
      Fig 21: Identifying Waveform Reference 20
      GTY218794Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 20 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G48-13 (LSWB) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Engine switch off, all doors closed and back door locked
  2. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY 
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