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Terminals Of Ecu

WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK THEFT WARNING ECU 
    Fig 1: Checking Theft Warning ECU
    G01483765Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T5 ECU connector.
    2. Measure the voltage and resistance between each terminal of the wire harness side connector.

      Standard: 

      Fig 2: Identifying Terminals Voltage And Resistance Specification Table
      G01483766Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    3. Reconnect the T5 ECU connector.
    4. Measure the voltage and resistance and resistance of each terminal of the connector.

      Standard: 

      Fig 3: Identifying Terminals Voltage And Resistance Specification Table
      G01483767Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  2. CHECK STEERING LOCK ECU 
    Fig 4: Checking Steering Lock ECU
    G01483768Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S46 ECU connector.
    2. Measure the voltage and resistance between each terminal of the wire harness side connector and body ground.

      Standard: 

      Fig 5: Identifying Terminals Voltage And Resistance Specification Table
      G01483769Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, the wire harness side may have a malfunction.

  3. CHECK DRIVER DOOR ECU 
    Fig 6: Checking Driver Door ECU
    G01483770Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D25 ECU connector.
    2. Measure the voltage and resistance between each terminal of the wire harness side connector and body ground.

      Standard: 

      Fig 7: Identifying Terminals Voltage And Resistance Specification Table
      G01483771Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, the wire harness side may have a malfunction.

  4. CHECK FRONT PASSENGER DOOR ECU 
    Fig 8: Checking Front Passenger Door ECU
    G01483772Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the F17 ECU connector.
    2. Measure the voltage and resistance between each terminal of the wire harness side connector and body ground.

      Standard: 

      Fig 9: Identifying Terminals Voltage And Resistance Specification Table
      G01483773Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, the wire harness side may have a malfunction.

  5. CHECK REAR DOOR LH ECU 
    Fig 10: Checking Rear Door LH ECU
    G01483774Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R13 ECU connector.
    2. Measure the voltage and resistance between each terminal of the wire harness side connector and body ground.

      Standard: 

      Fig 11: Identifying Terminals Voltage And Resistance Specification Table
      G01483775Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, the wire harness side may have a malfunction.

  6. CHECK REAR DOOR RH ECU 
    Fig 12: Checking Rear Door RH ECU
    G01483776Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R14 ECU connector.
    2. Measure the voltage and resistance between each terminal of the wire harness side connector and body ground.

      Standard: 

      Fig 13: Identifying Terminals Voltage And Resistance Specification Table
      G01483777Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, the wire harness side may have a malfunction.

  7. CHECK DRIVER SIDE J/B (DRIVER SIDE J/B ECU) 
    Fig 14: Checking Driver Side J/B (Driver Side J/B ECU)
    G01483778Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D5 ECU connector.
    2. Disconnect the DC, DD and DG J/B connectors.
    3. Measure the voltage and resistance between each terminal of the wire harness side connectors and body ground.

      Standard: 

      Fig 15: Identifying Terminals Voltage And Resistance Specification Table
      G01483779Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, the wire harness side may have a malfunction.

    4. Reconnect the D5 ECU connector.
    5. Reconnect the DC, DD and DG J/B connectors.
    6. Measure the voltage of each terminal of the connectors.

      Standard: 

      Fig 16: Identifying Terminals Voltage Specification Table
      G01483780Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, the driver side J/B may have a malfunction.

  8. CHECK DRIVER SIDE J/B (DRIVER SIDE J/B ECU) 
    Fig 17: Checking Driver Side J/B (Driver Side J/B ECU)
    G01483781Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L12 and L14 ECU connectors.
    2. Disconnect the LC and LF J/B connectors.
    3. Measure the voltage and resistance between wire harness side connectors and body ground.

      Standard: 

      Fig 18: Identifying Terminals Voltage And Resistance Specification Table
      G01483782Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, the wire harness side may have a malfunction.

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