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Terminals Of Ecu

  1. Clock Assembly (without Navigation System) 
    Fig 1: Identifying ECU J54 Connector Terminals
    G05828329Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    ILL+ (J54-3) - Body ground G - Body ground Illumination Signal Combination switch OFF Below 1 V
    Combination switch Head 10 to 14 V
    IG+ (J54-4) - Body ground B - Body ground Ignition Switch Signal Engine switch off Below 1 V
    Engine switch on (IG) 10 to 14 V
    ACC (J54-5) - Body ground O - Body ground Ignition Switch Signal Engine switch off Below 1 V
    Engine switch on (IG) 10 to 14 V
    E (J54-8) - Body ground W-B - Body ground Ground Always Below 1 V
    ILL-(J54-10)-Body ground LG - Body ground Illumination Signal Engine switch on (IG), combination switch Head, and light control rheostat position MAX. Pulse generation (See  awaveform)
    B (J54-14) - Body ground LG - Body ground Battery Always 10 to 14 V
    1. Waveform (Reference): Using an oscilloscope:

      OK: 

      WAVEFORM (REFERENCE)

      Item Condition
      Tool setting 5 V/DIV., 200 ms./DIV.
      Vehicle condition Engine switch on (IG), light control rheostat is in the MID. position.
      Fig 2: Identifying Waveform Reference
      G05828330Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Clock Assembly (with Navigation System) 
    Fig 3: Identifying J53 Connector Terminals
    G05828331Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    E (J53-2) - Body ground W-B - Body ground Ground Always Below 1 V
    ILL+ (J53-4) - Body ground G - Body ground Illumination Signal Combination switch OFF Below 1 V
    Combination switch Head 10 to 14 V
    ACC (J53-5) - Body ground W-B - Body ground Ignition Switch Signal Engine switch off Below 1 V
    Engine switch on (IG) 10 to 14 V
    +B (J53-6) - Body ground BR - Body ground Battery Always 10 to 14 V
    ILL-(J53-10)-Body ground W - Body ground Illumination Signal Engine switch on (IG), combination switch Head, and light control rheostat position MAX. Pulse generation (See  awaveform)
    IG (J53-11) - Body ground B - Body ground Ignition Switch Signal Engine switch off Below 1 V
    Engine switch on (IG) 10 to 14 V
    1. Waveform (Reference): Using an oscilloscope:

    OK: 

    WAVEFORM (REFERENCE)

    Item Condition
    Tool setting 5 V/DIV., 200 ms./DIV.
    Vehicle condition Engine switch on (IG), light control rheostat is in the MID. position.
    Fig 4: Identifying Waveform Reference
    G04966494Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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