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Terminals Of Ecu

  1. CHECK POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU) 
    1. Disconnect the O15 ECU connector.
      Fig 1: Identifying Power Back Door Drive Unit (Power Back Door ECU) Connector
      G05422010Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance according to the value(s) in the table below.
      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      O15-12 (B) - Body ground B - Body ground Battery power supply Always 10 to 14 V
      O15-10 (ECUB) - Body ground BR - Body ground ECUB power supply Always 10 to 14 V
      O15-8 (IG) - Body ground GR - Body ground IG power supply Ignition switch on (IG) 10 to 14 V
      O15-8 (IG) - Body ground GR - Body ground IG power supply Ignition switch off Below 1 V
      O15-11 (GND) - 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.

    3. Reconnect the O15 ECU connector.
    4. Measure the voltage according to the value(s) in the table below.
      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      O15-2 (DC+) - O15-1 (DC-) B-G Back door lock motor circuit Back door lock motor is operating 10 to 14 V
      O15-2 (DC+) - O15-1 (DC-) B-G Back door lock motor circuit Back door lock motor is not operating Below 1 V
      O15-20 (FUL) - Body ground LG - Body ground Back door courtesy switch circuit Back door is closed 10 to 14 V
      O15-20 (FUL) - Body ground LG - Body ground Back door courtesy switch circuit Back door is open Below 1 V
      O15-22 (HAF)- Body ground R - Body ground Back door lock half-latch switch signal circuit Back door is open → Back door closer motor → Back door is closed Below 1 V → 10 to 14 V → Below 1 V
      O15-24 (POS) - Body ground LG - Body ground Back door lock position switch signal circuit Back door is open → Back door closer operates → Back door is closed Below 1 V → 10 to 14 V → Below 1 V

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

  2. CHECK MAIN BODY ECU 
    1. Disconnect the D7, D8, 1F and 1M connectors.
      Fig 2: Identifying Main Body ECU Connectors
      G05421275Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.
      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      D8-26 (BDSU) - Body ground Y - Body ground Back door open switch signal circuit Back door open switch ON Below 1 Ω
      D8-26 (BDSU) - Body ground Y - Body ground Back door open switch signal circuit Back door open switch OFF 10 kΩ or higher
      D7-2 (PBDS) - Body ground R - Body ground Power back door open/close switch signal circuit Power back door open/close switch ON Below 1 Ω
      D7-2 (PBDS) - Body ground R - Body ground Power back door open/close switch signal circuit Power back door open/close switch OFF 10 kΩ or higher
      1F-10 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      1M-9 (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.

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