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Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.
      CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
  2. CHECK FOR OPEN IN CAN BUS WIRE (POWER BACK DOOR ECU BRANCH WIRE) 
    1. Disconnect the O30 power back door ECU connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester Connection Switch Condition Specified Condition
      O30-6 (CANP) - O30-5 (CANN) Ignition switch off 54 to 69 Ω

    NG: REPAIR OR REPLACE POWER BACK DOOR ECU BRANCH WIRE OR CONNECTOR (CANH, CANL) 

    Fig 1: Identifying O30 Power Back Door ECU Connector Terminals
    G05652988Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (POWER BACK DOOR ECU - BATTERY AND BODY GROUND) 
    1. Reconnect the cable to the negative (-) battery terminal.
    2. Disconnect the O30 power back door ECU connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester Connection Condition Specified Condition
      O30-11 (GND) - Body ground Always Below 1 Ω
    4. Measure the voltage according to the value (s) in the table below.
      Fig 2: Identifying O30 Power Back Door ECU Connector Terminals (Battery And Ground)
      G05652989Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester Connection Switch Condition Specified Condition
      O30-12 (B) - Body ground Always 11 to 14 V
      O30-10 (ECUB) - Body ground Always 11 to 14 V
      O30-8 (IG) - Body ground Ignition switch ON 11 to 14 V

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE POWER BACK DOOR UNIT ASSEMBLY  (See REMOVAL )

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