LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2007 >> IS 350 >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Audio / Visual >> Audio And Visual System >> Terminals Of Ecu
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Terminals Of Ecu

  1. RADIO RECEIVER 
    Fig 1: Identifying Radio Receiver ECU Connector Terminals
    G04050085Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    WIRING COLOR AND TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specification
    B(J66-1) - GND(J66-20) G - W-B Battery Always 10 to 14 V
    ILL+ (J66-2) - GND (J66-20) G - W-B Illumination signal Light control switch OFF Below 1 V
    ILL+ (J66-2) - GND (J66-20) G - W-B Illumination signal Light control switch TAIL 10 to 14 V
    ATX+ (J66-5) - GND (J66-20) V - W-B AVC-LAN communication signal Turn engine switch on (ACC) 2 to 3 V
    MUTE (J66-7) - GND (J66-20) BR - W-B Mute signal Audio system is playing Above 3.5 V
    MUTE (J66-7) - GND (J66-20) BR - W-B Mute signal Audio system is changing Below 1 V
    R+ (J66-8) - GND (J66-20) R - W-B Sound signal (Right) Audio system is playing A waveform synchronized with sounds is output
    L+ (J66-9) - GND (J66-20) B - W-B Sound signal (Left) Audio system is playing A waveform synchronized with sounds is output
    SLD (J66-10) - Body ground Shielded - Body ground Shielded ground Always Below 1 V
    ACC (J66-11) - GND (J66-20) O - W-B Accessory (ON) Turn engine switch off Below 1 V
    ACC (J66-11) - GND (J66-20) O - W-B Accessory (ON) Turn engine switch on (ACC) 10 to 14 V
    ILL-(J66-12) - GND(J66-20) W - W-B Illumination signal Light control switch OFF Below 1 V
    ILL-(J66-12) - GND(J66-20) W - W-B Illumination signal Light control switch TAIL 10 to 14 V
    ANT (J66-13) - GND (J66-20) Y - W-B Power source of antenna Radio switch ON and AM or FM 10 to 14 V
    ATX- (J66-15) - GND (J66-20) P - W-B AVC-LAN communication signal Turn engine switch on (ACC) 2 to 3 V
    R-(J66-18) - GND(J66-20) G - W-B Sound signal (Right) Audio system is playing A waveform synchronized with sounds is output
    L-(J66-19) - GND(J66-20) W - W-B Sound signal (Left) Audio system is playing A waveform synchronized with sounds is output
    GND (J66-20) - Body ground W - B - Body ground Ground Always Below 1 V
    SWG (J63-6) - GND (J66-20) GR - W-B Steering pad switch ground Always Below 1 V
    SW1 (J63-7) - GND (J66-20) SB - W-B Steering pad switch signal Steering pad switch not operated 4 V or more
    SW1 (J63-7) - GND (J66-20) SB - W-B Steering pad switch signal SEEK+ switch pushed Approx. 0.5 V
    SW1 (J63-7) - GND (J66-20) SB - W-B Steering pad switch signal SEEK- switch pushed Approx. 0.9 V
    SW1 (J63-7) - GND (J66-20) SB - W-B Steering pad switch signal VOL+ switch pushed Approx. 2.0 V
    SW1 (J63-7) - GND (J66-20) SB - W-B Steering pad switch signal VOL- switch pushed Approx. 3.4 V
    SW2 (J63-8) - GND (J66-20) L - W-B Steering pad switch signal Steering pad switch not operated 4 V or more
    SW2 (J63-8) - GND (J66-20) L - W-B Steering pad switch signal MODE switch pushed Approx. 0.5 V
    SW2 (J63-8) - GND (J66-20) (1) L - W-B Steering pad switch signal ON HOOK switch pushed Approx. 0.9 V
    SW2 (J63-8) - GND (J66-20) (1) L - W-B Steering pad switch signal OFF HOOK switch pushed Approx. 2.0 V
    SW2 (J63-8) - GND (J66-20) (1) L - W-B Steering pad switch signal VOICE switch pushed Approx. 3.4 V
    TX+ (J63-9) - GND (J66-20) (4) SB - W-B AVC-LAN communication signal Turn engine switch on (ACC) 2 to 3 V
    TX- (J63-10) - GND (J66-20) (4) O - W-B AVC-LAN communication signal Turn engine switch on (ACC) 2 to 3 V
    TX+ (J63-9) - GND (J66-20) (1) P - W-B AVC-LAN communication signal Turn engine switch on (ACC) 2 to 3 V
    TX- (J63-10) - GND (J66-20) (1) LG - W-B AVC-LAN communication signal Turn engine switch on (ACC) 2 to 3 V
    AR1 (J63-15) - GND (J66-20) (2) R - W-B Sound signal (Right) External device is playing (When stereo jack adapter is used) A waveform synchronized with sounds is output
    ASGN (J63-16) - GND (J66-20) (2) B - W-B Ground Always Below 1 V
    AL1 (J63-17) - GND (J66-20) (2) G - W-B Sound signal (Left) External device is playing (When stereo jack adapter is used) A waveform synchronized with sounds is output
    AUX1 (J63-19) - GND (J66-20) (2) L - W-B External device connection detection signal External device is connected Below 1 V
    AR1 (J61-2) - GND (J66-20) (3) R - W-B Sound signal (Right) External device is playing (When stereo jack adapter is used) A waveform synchronized with sounds is output
    ASGN (J61-5) - GND (J66-20) (3) B - W-B Ground Always Below 1 V
    AL1 (J61-3) - GND (J66-20) (3) G - W-B Sound signal (Left) External device is playing (When stereo jack adapter is used) A waveform synchronized with sounds is output
    AUX1 (J61-6) - GND (J66-20) (3) L - W-B External device connection detection signal External device is connected Below 1 V
    NTSC (J62-1) - GND (J66-20) (*1,*3) R - W-B DVD image signal DVD played on multi-display Pulse generation Refer to waveform 1
    GND (J62-2) - Body ground (*1, *3) G - Body ground Ground Always Below 1 V
    SLD (J62-3) - Body ground (*1, *3) Shielded - Body ground Shielded - Body ground Always Below 1 V
    TXM+ (J65-9) - GND (J66-20) (4) BR - W-B AVC-LAN communication signal Turn engine switch on (ACC) 2 to 3 V
    TXM- (J65-10) - GND (J66-20) (4) R - W-B AVC-LAN communication signal Turn engine switch on (ACC) 2 to 3 V
    DVD (s1-1) - GND (J66-20) (3) B - W-B Digital sound signal DVD played on multi-display Pulse generation
    (1) with Navigation System
    (2) for CD Changer Models
    (3) for DVD Changer Models
    (4) without Navigation Systems
    1. Reference: waveform 1

      HINT:

      • Terminal: NTSC - Body ground
      • Setting: 200 mV/DIV, 10 s/DIV
      • Condition: DVD display is ON.
  2. INTEGRATION CONTROL & PANEL ASSEMBLY (WITHOUT NAVIGATION SYSTEM) 
    Fig 2: Reference Waveform 1 Graph
    G04050086Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 3: Identifying Integration Control & Panel Assembly (Without Navigation System) Connector Terminal
    G04050087Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    WIRING COLOR AND TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specification
    TX-(J54-1) - E(J54-8) R - W-B AVC-LAN communication signal Turn engine switch on (ACC) 2 to 3 V
    TX+ (J54-2) - E (J54-8) BR - W-B AVC-LAN communication signal Turn engine switch on (ACC) 2 to 3 V
    IG+ (J54-4) - E (J54-8) B - W-B Ignition switch (ON) Turn engine switch on (IG) 10 to 14 V
    IG+ (J54-4) - E (J54-8) B - W-B Ignition switch (OFF) Turn engine switch off Below 1 V
    ACC (J54-5) - E (J54-8) O - W-B Accessory (OFF) Turn engine switch off Below 1 V
    ACC (J54-5) - E (J54-8) O - W-B Accessory (ON) Turn engine switch on (ACC) 10 to 14 V
    E (J54-8) - Body ground W - B - Body ground Ground Always Below 1 V
    B (J54-14) - E (J54-8) LG - W-B Battery Always 10 to 14 V
  3. STEREO COMPONENT AMPLIFIER 
    Fig 4: Identifying Stereo Component Amplifier Connector Terminals
    G04050088Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    WIRING COLOR AND TERMINAL DESCRIPTION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specification
    +B (P27-1) - GND(P27-2) R - W-B Battery Always 10 to 14 V
    GND (P27-2) - Body ground W - B - Body ground Ground Always Below 1 V
    +B2 (P27-3) - GND (P27-2) O - W-B Battery Always 10 to 14 V
    GND2 (P27-6) - Body ground W - B - Body ground Ground Always Below 1 V
    WF1+ (P28-1) - GND (P27-2) BR - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    WF2+ (P28-2) - GND (P27-2) (1) P - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    SR+ (P28-2) - GND (P27-2) (2) SB - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    MR+ (P28-3) - GND (P27-2) (1) SB - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    CTR+ (P28-3) - GND (P27-2) (2) Y - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    WFL+ (P28-4) - GND (P27-2) W - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    WF1- (P28-5) - GND (P27-2) LG - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    WF2- (P28-6) - GND (P27-2) (1) SB - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    SR- (P28-6) - GND (P27-2) (2) R - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    ML- (P28-7) - GND (P27-2) (1) L - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    SL- (P28-7) - GND (P27-2) (2) L - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    ML+ (P28-8) - GND (P27-2) (1) LG - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    SL+ (P28-8) - GND (P27-2) (2) LG - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    MR- (P28-9) - GND (P27-2) (1) R - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    CTR- (P28-9) - GND (P27-2) (2) B - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    WFL- (P28-10) - GND (P27-2) R - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    WFR+ (P29-1) - GND (P27-2) BR - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    FL+ (P29-2) - GND (P27-2) SB - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    RL+ (P29-3) - GND (P27-2) P - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    RR+ (P29-4) - GND (P27-2) R - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    WFR- (P29-5) - GND (P27-2) P - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    FL- (P29-6) - GND (P27-2) O - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    FR- (P29-7) - GND (P27-2) GR - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    FR+ (P29-8) - GND (P27-2) B - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    RL- (P29-9) - GND (P27-2) V - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    RR- (P29-10) - GND (P27-2) W - W-B Sound signal Audio system is playing A waveform synchronized with sounds is output
    MUTE (P30-1) - GND (P27-2) SB - W-B Mute signal Audio system is playing Above 3.5 V
    MUTE (P30-1) - GND (P27-2) SB - W-B Mute signal Audio system is changing Below 1 V
    L- (P30-2) - GND (P27-2) W - W-B Sound signal (Left) Audio system is playing A waveform synchronized with sounds is output
    L+ (P30-3) - GND (P27-2) B - W-B Sound signal (Left) Audio system is playing A waveform synchronized with sounds is output
    R- (P30-4) - GND (P27-2) G - W-B Sound signal (Right) Audio system is playing A waveform synchronized with sounds is output
    R+ (P30-5) - GND (P27-2) R - W-B Sound signal (Right) Audio system is playing A waveform synchronized with sounds is output
    SLD (P30-6) - Body ground Shielded - Body ground Shielded ground Always Below 1 V
    TX- (P30-7) - GND (P27-2) V - W-B AVC-LAN communication signal Turn engine switch on (ACC) 2 to 3 V
    TX+ (P30-8) - GND (P27-2) O - W-B AVC-LAN communication signal Turn engine switch on (ACC) 2 to 3 V
    SPD (P30-11) - GND(P27-2) L - W-B Speed signal Turn engine switch on (IG), drive wheels are turned slowly Pulse generation
    ACC (P30-12) - GND (P27-2) O - W-B Accessory (ON) Turn engine switch off Below 1 V
    ACC (P30-12) - GND (P27-2) O - W-B Accessory (ON) Turn engine switch on (ACC) 10 to 14 V
    II1- (P30-14) - GND (P27-2) (3) BR - W-B Voice guidance signal Voice guidance is provided A waveform synchronized with sounds is output
    II1+ (P30-15) - GND (P27-2) (3) Y - W-B Voice guidance signal Voice guidance is provided A waveform synchronized with sounds is output
    DVD (t1-1) - GND (P27-2) (4) B - W-B Digital sound signal DVD played on multi-display Pulse generation
    (1) without Front Center Speaker
    (2) with Front Center Speaker
    (3) with Navigation System
    (4) for DVD Changer Models
  4. GATEWAY ECU (See  TERMINALS OF ECU  )