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Terminals Of Ecu

  1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSY (BODY ECU) 
    Fig 1: Identifying Terminals Of ECU
    G03476923Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the IB, IE and IH J/B connectors.
    2. Check the voltage or continuity of each terminal of the wire harness side connectors.

      Standard: 

    WIRING COLOR CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    BECU (IB-4) <--> Body ground W-R <--> - Constant 10 --14 V
    BDR1 (IE-9) <--> Body ground G-W <--> - Constant Continuity
    GND1 (IH-2) <--> Body ground W-B <--> - Constant Continuity
    GND2 (IH-2) <--> Body ground W-B <--> - Constant Continuity

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

  2. CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSY (DRIVER DOOR ECU) 
    Fig 2: Identifying Connector Terminal
    G03476924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D18 switch connector.
    2. Check the voltage or continuity of each terminal of the wire harness side connector.

      Standard: 

    WIRING COLOR CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    E (D18-2) <--> Body ground W-B <--> - Constant Continuity
    CPUB (D18-9) <--> E (D18-2) L <-->W-B Constant 10 - 14 V
    BDR1 (D18-10) <--> E (D18-2) B-W <--> W-B Constant 10 - 14 V

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

  3. CHECK MULTIPLEX TILT & TELESCOPIC ECU (TILT & TELESCOPIC ECU) 
    Fig 3: Identifying Connector Terminal
    G03476925Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T6 ECU connector.
    2. Check the voltage or continuity of each terminal of the wire harness side connector.

      Standard: 

    WIRING COLOR CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    GND (T6-11) <--> Body ground W-G <--> - Constant Continuity
    +B <-->T6-2) <--> GND (T6-11) G-B <-->W-G Constant 10 - 14 V
    ECUB (T6-9) <--> GND (T6-11) W-R <-->W-G Constant 10 - 14 V

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

  4. CHECK MULTIPLEX NETWORK BODY ECU NO. 2 (BODY NO. 2 ECU) 
    Fig 4: Identifying Connector Terminal
    G03476926Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S27 ECU connector.
    2. Check the voltage or continuity of each terminal of the wire harness side connector.

      Standard: 

    WIRING COLOR CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    GND (S27-25) <--> Body ground W-B <--> - Constant Continuity
    SG <-->S27-24) <--> GND (S27-25) W-B <-->W-B Constant Continuity
    SIG (S27-3) <--> GND (S27-25) B-R <-->W-B Constant Continuity
    BECU (S27-4) <--> GND (S27-25) W-R <-->W-B Constant 10 - 14 V

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

  5. CHECK WINDSHIELD WIPER ECU (WIPER ECU) 
    Fig 5: Identifying Connector Terminal
    G03476927Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the W4 and W5 ECU connectors.
    2. Check the voltage or continuity of each terminal of the wire harness side connectors.

      Standard: 

    WIRING COLOR CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    GND (W4-12) <--> Body ground W-B <--> - Constant Continuity
    WIG <-->W5-10) <--> Body ground L <-->- Constant Continuity
    +B (W4-8) <--> GND (W4-12) W-R <-->W-B Constant 10 - 14 V

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

  6. CHECK THEFT WARNING ECU ASSY (THEFT DETERRENT ECU) 
    Fig 6: Identifying Connector Terminal
    G03476928Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T5 ECU connector.
    2. Check the voltage or continuity of each terminal of the wire harness side connector.

      Standard: 

    WIRING COLOR CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    E (T5-29) <--> Body ground W-B <--> - Constant Continuity
    +B1 (T5-2) <--> E (T5-29) W-R <-->W-B Constant 10 - 14 V
    +B2 (T5-3) <--> E (T5-29) P <-->W-B Constant 10 - 14 V

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

  7. CHECK POSITION CONTROL ECU & WIRING ASSY (POWER SEAT ECU) 
    Fig 7: Identifying Connector Terminal
    G03476929Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P19 and P20 ECU connectors.
    2. Check the voltage or continuity of each terminal of the wire harness side connectors.

      Standard: 

    WIRING COLOR CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    GND (P19-1) <--> Body ground W-B <--> - Constant Continuity
    +B (P19-5) <--> GND (P19-1) LG <-->W-B Constant 10 - 14 V
    SYSB (P20-8) <--> GND (P19-1) GR <-->W-B Constant 10 - 14 V

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

  8. CHECK MAYDAY ASSY 
    Fig 8: Identifying Connector Terminal
    G03476930Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the M8 ECU connector.
    2. Check the voltage or continuity of each terminal of the wire harness side connector.

      Standard: 

    WIRING COLOR CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    E (M8-12) <--> Body ground W-B <--> - Constant Continuity
    GND <-->M8-19) <--> Body ground W-B <-->- Constant Continuity
    +B (M8-2) <--> E (M8-12) G-R <-->W-B Constant 10 - 14 V

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

  9. CHECK OUTER MIRROR CONTROL ECU ASSY (MIRROR ECU) 
    Fig 9: Identifying Connector Terminal
    G03476931Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R10 ECU connector.
    2. Check the voltage or continuity of each terminal of the wire harness side connector.

      Standard: 

    WIRING COLOR CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    GND (R10-14) <--> Body ground W-B <--> - Constant Continuity
    +B <-->R10-1) <--> GND (R10-14) W-R <-->W-B Constant 10 - 14 V

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

  10. CHECK RAIN SENSOR 
    Fig 10: Identifying Connector Terminal
    G03476932Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R13 ECU connector.
    2. Check the voltage or continuity of each terminal of the wire harness side connector.

      Standard: 

    WIRING COLOR CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    ES (R13-3) <--> Body ground W-B <--> - Constant Continuity
    SIG <-->R13-1) <--> ES (R13-3) B-W <-->W-B Constant 10 - 14 V

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

  11. CHECK AIRBAG SENSOR ASSY CENTER (AIRBAG ECU) 
    Fig 11: Identifying Connector Terminal
    G03476933Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A28 ECU connector.
    2. Check the voltage or continuity of each terminal of the wire harness side connector.

      Standard: 

    WIRING COLOR CHART

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    E1 (A28-27) <--> Body ground W-B <-->- Constant Continuity
    E2(A28-28) <--> Body ground W-B <-->- Constant Continuity
    IG2 (A28-5) <--> E1 (A28-27) B-O <-->W-B Constant 10 - 14 V

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

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