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Terminals Of Ecu

WARNING: This page is about a different car, the 2007 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.
  1. RADIO RECEIVER ASSEMBLY (SEPARATE AMPLIFIER) 
    Fig 1: Identifying Radio Receiver Assembly Terminals
    G04412704Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION CONDITION AND SPECIFICATIONS

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specification
    SWG (R3-6) - Body ground W-R - Body ground Steering pad switch ground Always Below 1
    SW1 (R3-7) - GND (R1-20) V-W - BR Steering pad switch signal Steering pad switch not operating 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
    SW2 (R3-8) - GND (R1-20) Y-B - BR Steering pad switch signal Steering pad switch not operating 4 V or more
    MODE switch pushed Below 2.5 V
    B (R1-1) - GND (R1-20) L-Y - BR Battery Always 10 to 14 V
    TX+ (R1-5) - GND (R1-20) O - BR AVC-LAN communication signal Ignition switch ACC 2 to 3 V
    MUTE (R1-7) - GND (R1-20) V - BR Mute signal Audio system is playing Above 3.5 V
    Audio system is playing Below 1 V
    R+ (R1-8) - GND (R1-20) B - BR Sound signal (Right) Audio system is playing Waveform synchronized with sounds is output.
    L+ (R1-9) - GND (R1-20) R - BR Sound signal (Left) Audio system is playing Waveform synchronized with sounds is output.
    SGND (R1-10) - Body ground Shielded - Body ground Shielded ground Always Below 1
    ACC (R1-11) - GND (R1-20) GR - BR Accessory (ON) Ignition switch OFF Below 1 V
    Ignition switch ON 10 to 14 V
    TX- (R1-15) - GND (R1-20) R-W - BR AVC-LAN communication signal Ignition switch ACC 2 to 3 V
    R- (R1-18) - GND (R1-20) W - BR Sound signal (Right) Audio system is playing Waveform synchronized with sounds is output
    L- (R1-19) - GND (R1-20) G - BR Sound signal (Left) Audio system is playing Waveform synchronized with sounds is output
    GND (R1-20) - Body ground BR - Body ground Ground Always Below 1
  2. RADIO RECEIVER ASSEMBLY (BUILT-IN AMPLIFIER) 
    Fig 2: Identifying Radio Receiver Assembly Terminals - Built In Amplifier
    G04412705Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION CONDITION AND SPECIFICATIONS

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specification
    SWG (R3-6) - Body ground W-R - Body ground Steering pad switch ground Always Below 1
    SW1 (R3-7) - GND (R1-7) V-W - BR Steering pad switch signal Steering pad switch not operating 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
    SW2 (R3-8) - GND (R1-7) Y-B - BR Steering pad switch signal Steering pad switch not operating 4 V or more
    MODE switch pushed Below 2.5 V
    FR+ (R1-1) - GND (R1-7) LG - BR Sound signal (Front right) Audio system is playing Waveform synchronized with sounds is output
    FL+ (R1-2) - GND (R1-7) P - BR Sound signal (Front left) Audio system is playing Waveform synchronized with sounds is output
    ACC (R1-3) - GND (R1-7) GR - BR Accessory (ON) Ignition switch OFF Below 1 V
    Ignition switch ON 10 to 14 V
    B (R1-4) - GND (R1-7) L-Y - BR Battery Always 10 to 14 V
    FR- (R1-5) - GND (R1-7) L - BR Sound signal (Front right) Audio system is playing Waveform synchronized with sounds is output.
    FL- (R1-6) - GND (R1-7) V - BR Sound signal (Front left) Audio system is playing Waveform synchronized with sounds is output.
    GND (R1-7) - Body ground BR - Body ground Ground Always Below 1
    RR+ (R2-1) - GND (R1-7) R - BR Sound signal (Rear right) Audio system is playing Waveform synchronized with sounds is output.
    RL+ (R2-2) - GND (R1-7) B - BR Sound signal (Rear left) Audio system is playing Waveform synchronized with sounds is output.
    RR- (R2-3) - GND (R1-7) W - BR Sound signal (Rear right) Audio system is playing Waveform synchronized with sounds is output.
    RL- (R2-6) - GND (R1-7) Y - BR Sound signal (Rear left) Audio system is playing Waveform synchronized with sounds is output.
  3. STEREO COMPONENT AMPLIFIER ASSEMBLY 
    Fig 3: Identifying Stereo Component Amplifier Assembly Terminals
    G04412706Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION CONDITION AND SPECIFICATIONS

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    +B (S24-1) - GND (S24-15) W-L - BR Battery Always 10 to 14 V
    WFR+ (S24-3) - GND (S24-15) L-B - BR Sound signal (Woofer) Audio system is playing Waveform synchronized with sounds is output
    WFL+ (S24-2) - GND (S24-15) BR - BR Sound signal (Woofer) Audio system is playing Waveform synchronized with sounds is output
    RL+ (S24-4) - GND (S24-15) B - BR Sound signal (Rear left) Audio system is playing Waveform synchronized with sounds is output
    RR+ (S24-5) - GND (S24-15) R - BR Sound signal (Rear right) Audio system is playing Waveform synchronized with sounds is output
    FL+ (S24-6) - GND (S24-15) P - BR Sound signal (Front left) Audio system is playing Waveform synchronized with sounds is output
    FR+ (S24-7) - GND (S24-15) LG - BR Sound signal (Front right) Audio system is playing Waveform synchronized with sounds is output
    +B2 (S24-10) - GND (S24-15) W-L - BR Battery Always 10 to 14 V
    WFR- (S24-12) - GND (S24-15) L-R - BR Sound signal (Woofer) Audio system is playing Waveform synchronized with sounds is output
    WFL- (S24-11) - GND (S24-15) G-W - BR Sound signal (Woofer) Audio system is playing Waveform synchronized with sounds is output
    RL- (S24-13) - GND (S24-15) Y - BR Sound signal (Rear left) Audio system is playing Waveform synchronized with sounds is output
    RR- (S24-14) - GND (S24-15) W - BR Sound signal (Rear right) Audio system is playing Waveform synchronized with sounds is output
    GND (S24-15) - Body ground BR - Body ground Ground Always Below 1
    E (S24-16) - Body ground BR - Body ground Ground Always Below 1
    FL- (S24-17) - GND (S24-15) V - BR Sound signal (Front left) Audio system is playing Waveform synchronized with sounds is output
    FR- (S24-18) - GND (S24-15) L - BR Sound signal (Front right) Audio system is playing Waveform synchronized with sounds is output
    MUTE (S23-1) - GND (S24-15) V - BR Mute signal from radio receiver Audio system is playing Above 3.5 V
    Audio system is changing Below 1 V
    L- (S23-2) - GND (S24-15) G - BR Sound signal (Left) Audio system is playing Waveform synchronized with sounds is output
    L+ (S23-3) - GND (S24-15) R - BR Sound signal (Left) Audio system is playing Waveform synchronized with sounds is output
    R- (S23-4) - GND (S24-15) W - BR Sound signal (Right) Audio system is playing Waveform synchronized with sounds is output
    R+ (S23-5) - GND (S24-15) B - BR Sound signal (Right) Audio system is playing Waveform synchronized with sounds is output
    SGND (S23-6) - Body ground Shield - Body ground Shielded ground Always Below 1
    TX- (S23-7) - GND (S24-15) R-W - BR AVC-LAN communication signal Ignition switch ACC 2 to 3 V
    TX+ (S23-8) - GND (S24-15) O - BR AVC-LAN communication signal Ignition switch ACC 2 to 3 V
    ACC (S23-12) - GND (S23-15) GR - BR Accessory (ON) Ignition switch OFF Below 1 V
    Ignition switch ON 10 to 14 V
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