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Terminals Of Ecu

  1. CHECK TRANSPONDER KEY ECU 
    Fig 1: Identifying Transponder Key T13 ECU Connector Terminals
    G05292943Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T13 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      ECU CONNECTOR TERMINALS REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (T13-13) - Body ground V - Body ground Ground Always Below 1 Ω
      CPUB (T13-1) - GND (T13-14) L-O - W-B +B power supply Always 10 to 14 V
      IG2 (T13-2) - AGND (T13-13) G-B-V Ignition power supply Ignition switch ON 10 to 14 V
      KSW (T13-3) - AGND (T13-13) LG-B - V Unlock warning switch signal No key in ignition key cylinder 10 kΩ or higher
      KSW (T13-3) - AGND (T13-13) LG-B - V Unlock warning switch signal Key inserted Below 1 Ω

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

    3. Reconnect the T13 ECU connector.
    4. Measure the voltage of the connector.
      ECU CONNECTOR TERMINALS REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      VC12 (T13-9) - AGND (T13-13) Y - V Power source Ignition switch ON 4.6 to 5.4 V

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

  2. CHECK MULTIPLEX NETWORK FRONT DOOR ECU LH (DRIVER DOOR ECU) 
    Fig 2: Identifying D17 And D19 ECU Connectors Terminals
    G05292944Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D17 and D19 ECU connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      ECU CONNECTOR TERMINALS REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (D19-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      CPUB (D19-4) - Body ground L-O - Body ground +B power supply Always 10 to 14 V
      SIG (D19-5) - Body ground V-W - Body ground Ignition power supply Ignition switch ON 10 to 14 V
      BDR (D19-6) - Body ground B-R - Body ground +B power supply Always 10 to 14 V
      CTY (D17-27) - Body ground R-W - Body ground Driver side courtesy switch input Driver side door CLOSED 10 kΩ or higher
      CTY (D17-27) - Body ground R-W - Body ground Driver side courtesy switch input Driver side door OPEN Below 1 Ω

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

  3. CHECK THEFT WARNING ECU 
    Fig 3: Identifying T7 ECU Connector Terminals
    G05292945Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T7 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      ECU CONNECTOR TERMINALS REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (T7-24) - Body ground V-W - Body ground Ignition power supply Ignition switch ON 10 to 14 V
      +B (T7-1) - Body ground L-O - Body ground +B power supply Always 10 to 14 V
      +B2 (T7-21) - Body ground B-O - Body ground +B2 power supply Always 10 to 14 V
      GND (T7-20) - 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.

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