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Terminals Of Ecu

WARNING: This page is about a different car, the 2006 Lexus GS 430 and 2006 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK RADIO RECEIVER ASSEMBLY 
    Fig 1: Identifying Radio Receiver Connector Terminals
    G04022113Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SYMBOLS AND SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    B (K54-1) - GND (K54-20) S-B - BR Battery Always 10 to 14 V
    ILL+ (K54-2) - GND (K54-20) G - BR Illumination signal Engine switch on (IG) Light control switch OFF Below 1 V
    Engine switch on (IG) Light control switch TAIL or ON 10 to 14 V
    MUTE (K54-7) - GND (K54-20) S-B - BR Mute signal Audio system is playing Above 3.5 V
    Changing mode Below 1 V
    MUTE (K53-6) - GND (K54-20) P - BR Mute signal Audio system is playing Above 3.5 V
    Changing mode Below 1 V
    R+ (K54-8) - GND (K54-20) R - BR Sound signal (Right) Audio system is playing -
    L+ (K54-9) - GND (K54-20) B - BR Sound signal (Left) Audio system is playing -
    R- (K54-18) - GND (K54-20) G - BR Sound signal (Right) Audio system is playing -
    L- (K54-19) - GND (K54-20) W - BR Sound signal (Left) Audio system is playing -
    GND (K54-20) - Body ground BR - Body ground Ground Always Below 1 Ω
    SGND (K54-10) - Body ground Shielded - Body ground Ground Always Below 1 Ω
    ACC (K54-11) - GND (K54-20) GR - BR Accessory (ON) Engine switch off Below 1 V
    Engine switch on (ACC) 10 to 14 V
    ILL- (K54-12) - GND (K54-10) W - BR Illumination signal Engine switch off Below 1 V
    Engine switch on (IG) Pulse generation
    TX+ (K56-9) - GND (K54-20) L - BR AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    TX- (K56-10) - GND (K54-20) LG - BR AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    TXM+ (K53-9) - GND (K54-20)) Y - BR AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    TXM- (K53-10) - GND (K54-20) B - BR AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    ATX+ (K54-5) - GND (K54-20) L - BR AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    ATX- (K54-15) - GND (K54-20) LG - BR AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    ANT (K54 - 13) O - BR Antenna signal Audio system is playing -
    SWG (K56-6) - GND (K54-20) LG - BR Steering pad switch signal Audio system is playing -
    SW1 (K56-7) - GND (K54-20) Y - BR Steering pad switch signal Audio system is playing -
    SW2 (K56-8) - GND (K54-20) O - BR Steering pad switch signal Audio system is playing -
  2. CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY 
    Fig 2: Identifying Stereo Component Amplifier Connector Terminals
    G04022114Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SYMBOLS AND SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    WFL+ *1 (U30-3) - GND (U31-16) W - W-B Sound signal (Front left) Audio system is playing -
    WFR+ *1 (U30-4) - GND (U31-16) G - W-B Sound signal (Front right) Audio system is playing -
    WFL- *1 (U30-9) - GND (U31-16) R - W-B Sound signal (Front left) Audio system is playing -
    WFR- *1 (U30-10) - GND (U31-16) W - W-B Sound signal (Front right) Audio system is playing -
    MUTE (U29-1) - GND (U31-16) O - W-B Mute signal from radio receiver Audio system is sounding Above 3.5 V
    Changing mode Below 3.5 V
    L- (U29-2) - GND (U31-16) W - W-B Sound signal from radio receiver (Left) Audio system is playing -
    L+ (U29-3) - GND (U31-16) B - W-B Sound signal from radio receiver (Left) Audio system is playing -
    R- (U29-4) - GND (U31-16) G - W-B Sound signal from radio receiver (Right) Audio system is playing -
    R+ (U29-5) - GND (U31-16) B - W-B Sound signal from radio receiver (Right) Audio system is playing -
    TX- (U29-7) - GND (U31-16) L - W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    TX+ (U29-8) - GND (U31-16) LG - W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    ACC (U29-12) - GND (U31-16) GR - W-B Accessory (ON) Engine switch off Below 1 V
    Engine switch on (ACC) 10 to 14 V
    SPD (U29-11) - GND (U31-16) V - W-B Speed signal from combination meter Vehicle is being driven Pulse generation
    TXD- *1, RTX- *2 (U29-19) - GND (U31-16) R - W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    TXD+ *1, RTX+ *2 (U29-20) - GND (U31-16) G - W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    TMUT (U29-24) - GND (U31-16) LG - W-B Mute signal from radio receiver Audio system is sounding Above 3.5 V
    Changing mode Below 3.5 V
    +B2 *1 (U31-10), +B *2 (U31-1) - GND (U31-16) SB - W-B Battery Always 10 to 14 V
    RL+ (U31-6) - GND (U31-16) B - W-B Sound signal (Rear left) Audio system is playing -
    RR+ (U31-7) - GND (U31-16) R - W-B Sound signal (Rear right) Audio system is playing -
    FL+ (U31-8) - GND (U31-16) P - W-B Sound signal (Front left) Audio system is playing -
    FR- (U31-20) - GND (U31-16) L - W-B Sound signal (Front right) Audio system is playing -
    RL- (U31-17) - GND (U31-16) Y - W-B Sound signal (Rear left) Audio system is playing -
    RR- (U31-18) - GND (U31-16) W - W-B Sound signal (Rear right) Audio system is playing -
    FL- (U31-19) - GND (U31-16) V - W-B Sound signal (Front left) Audio system is playing -
    FR+ (U31-9) - GND (U31-16) LG - W-B Sound signal (Front right) Audio system is playing -
    GND (U31-16) - Body ground W-B - Body ground Ground Always Below 1 Ω
    GND2 (U31-15) - Body ground W-B - Body ground Ground Always Below 1 Ω
    SL+ *1 (U30-1) - GND (U31-16) LG - W-B Sound signal (Rear LH) Audio system is playing -
    SL- *1 (U30-5) - GND (U31-16) L - W-B Sound signal (Rear LH) Audio system is playing -
    SR+ *1 (U30-2) - GND (U31-16) B - W-B Sound signal (Rear RH) Audio system is playing -
    SR- *1 (U30-6) - GND (U31-16) Y - W-B Sound signal (Rear RH) Audio system is playing -
    WF1+ (U31-5) - GND P - W-B Sound signal (Woofer) Audio system is playing -
    WF1- (U31-14) - GND V - W-B Sound signal (Woofer) Audio system is playing -
    WF2+ (U31-4) - GND L - W-B Sound signal (Woofer) Audio system is playing -
    WF2- (U31-13) - GND LG - W-B Sound signal (Woofer) Audio system is playing -
    CTR+ (U31-3) - GND Y - W-B Sound signal (Center) Audio system is playing -
    CTR- (U31-12) - GND B - W-B Sound signal (Center) Audio system is playing -
    INT+ (U29-23) - GND Y - W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    INT- (U29-22) - GND BR - W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V

    HINT:

    • *1: Mark Levinson models
    • *2: Standard models
  3. CHECK GATEWAY ECU 
    Fig 3: Identifying Gateway ECU Connector Terminals
    G04022115Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SYMBOLS AND SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    GTX+ (K66-6) - GND (K66-24) L - W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    GTX- (K66-21) - GND (K66-24) LG - W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    GND (K66-24) - Body ground W-B - Body ground Ground Always Below 1 Ω
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