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Terminals Of Ecu

WARNING: This page is about a different car, the 2007 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK COWL SIDE JUNCTION BLOCK RH ASSEMBLY (MULTIPLEX NETWORK BODY ECU) 
    Fig 1: Identifying Cowl Side Junction Block RH Assembly (Multiplex Network Body ECU) Connector Terminals
    G04412600Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the 1A, 1C, 1F, 1H, 1I, 1J, and 1K driver side J/B connectors.
    2. Measure the resistance and voltage of the wire harness side connectors.

      Standard: 

      TERMINAL REFERENCE TABLE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (1A-4) - Body ground L-Y - Body ground Ignition power supply Ignition switch OFF 0 V
      Ignition switch ON 10 to 14 V
      ECUB (1C-16) - Body ground R - Body ground +B (ECUB) power supply Always 10 to 14 V
      ALTB (1A-6) - Body ground L - Body ground +B (power system, generator system) power supply Always 10 to 14 V
      KSW (1K-10) - Body ground G-B - Body ground Key unlock warning switch input No key in ignition key cylinder 10 k or higher
      Key inserted in ignition key cylinder Below 1
      DCTY (1F-7) - Body ground G-Y - Body ground Driver side courtesy switch input Driver side door Closed 10 k or higher
      Driver side door Open Below 1
      PCTY (1I-8) - Body ground R-B - Body ground Passenger side courtesy switch input Passenger side door Closed 10 k or higher
      Passenger side door Open Below 1
      RCTY (1F-6) - Body ground P-B - Body ground Rear LH side courtesy switch input Rear LH side door Closed 10 k or higher
      Rear LH side door Open Below 1
      RCTY (1J-15) - Body ground P-B - Body ground Rear LH side courtesy switch input Rear LH side door Closed 10 k or higher
      Rear LH side door Open Below 1
      GND (1H-18) - Body ground W-B - Body ground Ground Always Below 1

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

    3. Reconnect the driver side J/B connectors.
    4. Measure the voltage of the connectors.

      Standard: 

      TERMINAL REFERENCE TABLE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      HAZ (1L-8) - Body ground W - Body ground Hazard light drive Answer-back ON Pulse generation
      Answer-back OFF 10 to 14 V
      RDA (B5-7) - Body ground L - Body ground Door control receiver input No key in ignition key cylinder and all doors closed and transmitter switch OFF Below 1 V
      No key in ignition key cylinder and all doors closed and transmitter switch ON Approx. 6 to 7 V

      If the result is not as specified, there may be a malfunction on the driver side J/B assembly (multiplex network body ECU).

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