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Ecu Connector Terminal Identification

WARNING: This page is about a different car, the 2008 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
  1. RADIO RECEIVER (9 SPEAKER SYSTEM) 
    Fig 1: Identifying Radio Receiver Terminals (9 Speaker System)
    G05407721Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    VOLTAGE SPECIFICATION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specification
    FR+ (E13-1) - GND (E13-7) GR - BR Sound signal (Front Right) Audio system is playing A waveform synchronized with sounds is output
    FL+ (E13-2) - GND (E13-7) P - BR Sound signal (Front Left) Audio system is playing A waveform synchronized with sounds is output
    ACC (E13-3) - GND (E13-7) Y - BR Accessory (ON) Turn ignition switch off → on (ACC) Below 1 V → 10 to 14 V
    B (E13-4) - GND (E13-7) R - BR Battery Always 10 to 14 V
    FR- (E13-5) - GND (E13-7) W - BR Sound signal (Front Right) Audio system is playing A waveform synchronized with sounds is output
    FL- (E13-6) - GND (E13-7) V - BR Sound signal (Front Left) Audio system is playing A waveform synchronized with sounds is output
    GND (E13-7) - Body ground BR - Body ground Ground Always Below 1 V
    ANT (E13-8) - GND (E13-7) B - BR Power source of antenna Radio is ON 10 to 14 V
    ILL+ (E13-10) - GND (E13-7) G - BR Illumination signal Light control switch OFF → TAIL or ON Below 1 V → 10 to 14 V
    RR+ (E14-1) - GND (E13-7) R - BR Sound signal (Rear Right) Audio system is playing A waveform synchronized with sounds is output
    RL+ (E14-2) - GND (E13-7) Y - BR Sound signal (Rear Left) Audio system is playing A waveform synchronized with sounds is output
    RR- (E14-3) - GND (E13-7) W - BR Sound signal (Rear Right) Audio system is playing A waveform synchronized with sounds is output
    ILL- (E14-5) - GND (E13-7) LG - BR Illumination signal Light control switch OFF → TAIL or ON Below 1V → Pulse generation
    RL- (E14-6) - GND (E13-7) B - BR Sound signal (Rear Left) Audio system is playing A waveform synchronized with sounds is output
    GND (E15-6) - Body ground B - Body ground Steering pad switch ground Always Below 1 V
    1CH (E15-7) - GND (E13-7) O - BR Steering pad switch signal Steering pad switch not operated 4 V or more
    → SEEK+ switch pushed → Approx 0.5 V
    → SEEK- switch pushed → Approx 0.9 V
    → VOL+ switch pushed → Approx 2.0 V
    → VOL- switch pushed → Approx 3.4 V
    2CH (E15-8) - GND (E13-7) V - BR Steering pad switch signal Steering pad switch not operated 4 V or more
    → MODE switch pushed → Approx 0.5 V
    TX+ (E15-9) - TX- (E15-10) Y - B AVC-LAN communication signal Turn ignition switch on (ACC) 2 to 3 V
    ARI (E15-15) - GND (E13-7) G - BR Sound signal (Right) External device is playing (When stereo jack is used) A waveform synchronized with sounds is output
    ASGN (E15-16) - GND (E13-7) L - BR Ground Always Below 1 V
    ALI (E15-17) - GND (E13-7) P - BR Sound signal (Left) External device is playing (When stereo jack is used) A waveform synchronized with sounds is output
    AUXG (E15-18) - Body ground Shielded - Body ground Shield ground Always Below 1 V
    AUXI (E15-19) - GND (E13-7) SB - BR External device connection detection signal External device is connected Below 1 V
  2. RADIO RECEIVER (12 SPEAKER SYSTEM) 
    Fig 2: Identifying Radio Receiver Terminals (12 Speaker System)
    G05407722Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    VOLTAGE SPECIFICATION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specification
    B (E12-1) - GND (E12-20) R - BR Battery Always 10 to 14 V
    ILL+ (E12-2) - GND (E12-20) G - BR Illumination signal Light control switch OFF → TAIL or ON Below 1.0 V → 10 to 14 V
    ATX+ (E12-5) - ATX- (E12-15) Y - BR AVC-LAN communication signal Turn ignition switch on (ACC) 2 to 3 V
    MUTE (E12-7) - GND (E12-20) R - BR Mute signal Audio system is playing → Changing mode Above 3.5 V → Below 1 V
    R+ (E12-8) - GND (E12-20) R - BR Sound signal (Right) Audio system is playing A waveform synchronized with sounds is output
    L+ (E12-9) - GND (E12-20) B - BR Sound signal (Left) Audio system is playing A waveform synchronized with sounds is output
    SLD (E12-10) - Body ground Shielded - Body ground Ground Always Below 1 V
    ACC (E12-11) - GND (E12-20) Y - BR Accessory (ON) Turn ignition switch off → on (ACC) Below 1 V → 10 to 14 V
    ILL- (E12-12) - GND (E12-20) LG - BR Illumination signal Light control switch OFF → TAIL or ON Below 1.0 V → Pulse generation
    ANT (E12-13) - GND (E12-20) B - BR Antenna Radio is ON 10 to 14 V
    R- (E12-18) - GND (E12-20) G - BR Sound signal (Right) Audio system is playing A waveform synchronized with sounds is output
    L- (E12-19) - GND (E12-20) W - BR Sound signal (Left) Audio system is playing A waveform synchronized with sounds is output
    GND (E12-20) - Body ground BR - Body ground Ground Always Below 1 V
    GND (E15-6) - Body ground B - Body ground Steering pad switch ground Always Below 1 V
    1CH (E15-7) - GND (E12-20) O - BR Steering pad switch signal Steering pad switch not operated 4 V or more
    → SEEK+ switch pushed → Approx 0.5 V
    → SEEK- switch pushed → Approx 0.9 V
    → VOL+ switch pushed → Approx 2.0 V
    → VOL- switch pushed → Approx 3.4 V
    2CH (E15-8) - GND (E12-20) V - BR Steering pad switch signal Steering pad switch not operated 4 V or more
    → MODE switch pushed → Approx 0.5 V
    → ON HOOK switch pushed → Approx 0.9 V
    → OFF HOOK switch pushed → Approx 2.0 V
    TX+ (E15-9) - TX- (E15-10) Y - B AVC-LAN communication signal Turn ignition switch on (ACC) 2 to 3 V
    IVO+ (E15-11) - GND (E12-20) Y - BR Voice signal "Bluetooth" handsfree voice signal is received A waveform synchronized with sounds is output
    IVO- (E15-12) - GND (E12-20) BR - BR Voice signal "Bluetooth" handsfree voice signal is received A waveform synchronized with sounds is output
    SLD1 (E15-13) - Body ground Shielded - Body ground Shield ground Always Below 1 V
    ARI (E15-15) - GND (E12-20) G - BR Sound signal (Right) External device is playing (When stereo jack is used) A waveform synchronized with sounds is output
    ASGN (E15-16) - GND (E12-20) L - BR Ground Always Below 1 V
    ALI (E15-17) - GND (E12-20) P - BR Sound signal (Left) External device is playing (When stereo jack is used) A waveform synchronized with sounds is output
    AUXG (E15-18) - Body ground Shielded - Body ground Shield ground Always Below 1 V
    AUXI (E15-19) - GND (E12-20) SB - BR External device connection detection signal External device is connected Below 1 V
    MIC- (E30-1) - GND (E12-20) R - BR Microphone voice signal (Ground) "Bluetooth" handsfree function is ON Below 1 V
    MIC+ (E30-2) - GND (E12-20) G - BR Microphone voice signal "Bluetooth" handsfree function is ON A waveform synchronized with sounds is output
    TSW- (E30-3) - GND (E12-20) P - BR Ground Always Below 1 V
    +B (E30-5) - GND (E12-20) L - BR Battery Always 10 to 14 V
    MGND (E30-6) - GND (E12-20) P - BR Ground Always Below 1 V
    MCVD (E30-7) - GND (E12-20) LG - BR Microphone amplifier power supply Turn ignition switch off Below 1 V
    MCVD (E30-7) - GND (E12-20) LG - BR Microphone amplifier power supply Turn ignition switch on (IG) 4 to 6 V
    GND (E30-14) - Body ground BR - Body ground Ground Always Below 1V
    ACC (E30-16) - GND (E12-20) GR - BR Accessory (ON) Turn ignition switch off Below 1 V
    ACC (E30-16) - GND (E12-20) GR - BR Accessory (ON) Turn ignition switch on (ACC) 10 to 14 V
  3. STEREO COMPONENT AMPLIFIER (12 SPEAKER SYSTEM) 
    Fig 3: Identifying Stereo Component Amplifier Terminals (12 Speaker System)
    G05006187Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    VOLTAGE SPECIFICATION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specification
    FL- (E19-1) - GND (E19-6) V - W-B Sound signal (Front Left) Audio system is playing A waveform synchronized with sounds is output
    FL+ (E19-2) - GND (E19-6) P - W-B Sound signal (Front Left) Audio system is playing A waveform synchronized with sounds is output
    FR- (E19-3) - GND (E19-6) L - W-B Sound signal (Front Right) Audio system is playing A waveform synchronized with sounds is output
    SL+ (E19-4) - GND (E19-6) LG - W-B Sound signal (Surround Left) Audio system is playing A waveform synchronized with sounds is output
    WF1+ (E19-5) - GND (E19-6) GR - W-B Sound signal (Woofer) Audio system is playing A waveform synchronized with sounds is output
    GND (E19-6) - Body ground W-B - Body ground Ground Always Below 1 V
    GND2 (E19-7) - Body ground W-B - Body ground Ground Always Below 1 V
    FR+ (E19-9) - GND (E19-6) LG - W-B Sound signal (Front Right) Audio system is playing A waveform synchronized with sounds is output
    SL- (E19-10) - GND (E19-6) L - W-B Sound signal (Surround Left) Audio system is playing A waveform synchronized with sounds is output
    WF1- (E19-12) - GND (E19-6) W - W-B Sound signal (Woofer) Audio system is playing A waveform synchronized with sounds is output
    MUTE (E20-1) - GND (E19-6) R - W-B Mute signal Audio system is playing → Changing mode Above 3.5 V → Below 1 V
    L- (E20-2) - GND (E19-6) W - W-B Sound signal from radio receiver (Left) Audio system is playing A waveform synchronized with sounds is output
    L+ (E20-3) - GND (E19-6) B - W-B Sound signal from radio receiver (Left) Audio system is playing A waveform synchronized with sounds is output
    R- (E20-4) - GND (E19-6) G - W-B Sound signal from radio receiver (Right) Audio system is playing A waveform synchronized with sounds is output
    R+ (E20-5) - GND (E19-6) R - W-B Sound signal from radio receiver (Right) Audio system is playing A waveform synchronized with sounds is output
    TX- (E20-7) - TX+ (E20-8) BR - Y AVC-LAN communication signal Turn ignition switch on (ACC) 2 to 3 V
    SPD (E20-11) - GND (E19-6) W - W-B Speed signal from combination meter Turn ignition switch on (IG) Turn drive wheels slowly Pulse generation
    ACC (E20-12) - GND (E19-6) Y - W-B Accessory (ON) Turn ignition switch off → on (ACC) Below 1 V → 10 to 14 V
    INT- (E20-22) - GND (E19-6) BR - W-B Voice signal Navigation or "Bluetooth" handsfree voice signal is transmitted A waveform synchronized with sounds is output
    INT+ (E20-23) - GND (E19-6) Y - W-B Voice signal Navigation or "Bluetooth" handsfree voice signal is transmitted A waveform synchronized with sounds is output
    +B (E26-1) - GND (E19-6) L - W-B Battery Always 10 to 14 V
    SR+ (E26-2) - GND (E19-6) BR - W-B Sound signal (Surround Right) Audio system is playing A waveform synchronized with sounds is output
    RL+ (E26-3) - GND (E19-6) Y - W-B Sound signal (Rear Left) Audio system is playing A waveform synchronized with sounds is output
    RR- (E26-4) - GND (E19-6) W - W-B Sound signal (Rear Right) Audio system is playing A waveform synchronized with sounds is output
    +B2 (E26-5) - GND (E19-6) L - W-B Battery Always 10 to 14 V
    SR- (E26-6) - GND (E19-6) G - W-B Sound signal (Surround Right) Audio system is playing A waveform synchronized with sounds is output
    CTR- (E26-7) - GND (E19-6) B - W-B Sound signal (Center) Audio system is playing A waveform synchronized with sounds is output
    CTR+ (E26-8) - GND (E19-6) Y - W-B Sound signal (Center) Audio system is playing A waveform synchronized with sounds is output
    RL- (E26-9) - GND (E19-6) B - W-B Sound signal (Rear Right) Audio system is playing A waveform synchronized with sounds is output
    RR+ (E26-10) - GND (E19-6) R - W-B Sound signal (Rear Right) Audio system is playing A waveform synchronized with sounds is output
  4. GATEWAY ECU 
    Fig 4: Identifying Gateway ECU Terminals
    G05006189Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    VOLTAGE SPECIFICATION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specification
    IG (E23-1) - GND (E23-24) W - W-B Ignition switch on (IG) Always 10 to 14 V
    ACC (E23-2) - GND (E23-24) R - W-B Accessory (ON) Turn ignition switch off → on (ACC) Below 1 V → 10 to 14 V
    GTX+ (E23-6) - GTX- (E23-21) BR - R AVC-LAN communication signal Turn ignition switch on (ACC) 2 to 3 V
    BATT (E23-10) - GND (E23-24) B - W-B Battery Always 10 to 14 V
    GND (E23-24) - Body ground W-B - Body ground Ground Always Below 1 V
  5. MULTI-DISPLAY (ACCESSORY METER)  (See TERMINALS OF ECU )
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