LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2002 >> SC 430 >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Audio System - Diagnosis >> Terminals Of Ecu

Terminals Of Ecu

  1. RADIO RECEIVER ASSY 
    Fig 1: Identifying ECU Terminals - Radio Receiver Assy
    G03386707Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINALS VOLTAGE SPECIFICATION

    Symbols (Terminals No.) Wiring Color Condition STD Voltage (V)
    R1-1 - R3-20 (ANTA - GND) L-R - W-B Antenna does not extend. 10 - 14 V
    R1-3 (TXS+) LG -
    R1-2 - R3-20 (DOS1 - GND) L - W-B Audio door control switch ON 10 - 14 V
    R1-4 - R3-20 (ANTB - GND) W-R - W-B Antenna does not extend. 10 - 14 V
    R1-6 (TXS-) P -
    R2-9 (ATX-) R - W ((1)) -
    R2-10 (ATX+) L-R ((1)) -
    R3-1 - R3-20 (+B- GND) W-R - W-B Constant 10 - 14 V
    R3-2 - R3-20 (1LL+ - GND) G- W-B Light control switch TAIL 10 - 14 V
    R3-5 (TX+) LG -
    R3-7 - R3-20 (MUTE - GND) L-W - W-B Switching CD player --> Cassette player Below 3.5 V
    R3-8 - R3-20 (R+ - GND) B - W-B Audio system is sounding A waveform synchronized with sound is output
    R3-9 - R3-20 (L+ - GND) R - W-B Audio system is sounding A waveform synchronized with sound is output
    R3-10 - Body ground (SGND - Body ground) - Constant Below 1 V
    R3-11 - R3-20 (ACC - GND) GR - W-B Ignition switch OFF Below 1 V
    Ignition switch ACC or ON 10 - 14 V
    R3-12 - R3-20 (ILL - GND) W-G - W-B Light control switch Below 0.5 V
    R3-13 - R3-20 ANT - GND B-R - W-B Antenna does not extend. 10 - 14 V
    R3-15 (TX-) G-R -
    R3-18 - R3-20 (R-- GND) W - W-B Audio system is sounding A waveform synchronized with sound is output
    R3-19 - R3-20 (L-- GND) G - W-B Audio system is sounding A waveform synchronized with sound is output
    R3-20 - Body ground (GND - Body ground) W-B - Body ground Constant Below 1 V
    (1) w/ LEXUS Navigation System
  2. STEREO COMPONENT AMPLIFIER ASSY 
    Fig 2: Identifying ECU Terminals - Stereo Component Amplifier Assy
    G03386708Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINALS VOLTAGE SPECIFICATION

    Symbols (Terminals No.) Wiring Color Condition STD Voltage (V)
    S22-1 - S22-13 (FR+ - GND) LG - W-B Audio system is sounding A waveform synchronized with sound is output
    S22-2 - S22-13 (FL+ - GND) P - W-B Audio system is sounding A waveform synchronized with sound is output
    S22-3 - S22-13 (RR+ - GND) R - W-B Audio system is sounding A waveform synchronized with sound is output
    S22-4 - S22-13 (RL+ - GND) B - W-B Audio system is sounding A waveform synchronized with sound is output
    S22-5 - S22-13 (WFR+ - GND) L-R - W-B Audio system is sounding A waveform synchronized with sound is output
    S22-6 - S22-13 (WFL+ - GND) R-L - W-B Audio system is sounding A waveform synchronized with sound is output
    S22-7 - S22-13 (+B - GND) W-R - W-B Constant 10 - 14 V
    S22-8 - S22-13 (FR-- GND) L - W-B Audio system is sounding A waveform synchronized with sound is output
    S22-9 - S22-13 (FL-- GND) V - W-B Audio system is sounding A waveform synchronized with sound is output
    S22-10 - S22-13 (RR-- GND) W - W-B Audio system is sounding A waveform synchronized with sound is output
    S22-11 - S22-13 (RL-- GND) Y - W-B Audio system is sounding A waveform synchronized with sound is output
    S22-12 - Body ground (E - Body ground) W-B - Body ground Constant Below 1 V
    S22-13 - Body ground (GND - Body ground) W-B - Body ground Constant Below 1 V
    S22-14 - S22-13 (WFR-- GND) L-B - W-B Audio system is sounding A waveform synchronized with sound is output
    S22-15 - S22-13 (WFL - GND) R-B - W-B Audio system is sounding A waveform synchronized with sound is output
    S22-16 - S22-13 (+B2 - GND) W-R - W-B Constant 10 - 14 V
    S23-1 - S22-13 (FR+ - GND) L-B - W-B Audio system is sounding A waveform synchronized with sound is output
    S23-2 - S22-13 (FL+ - GND) L-O - W-B Audio system is sounding A waveform synchronized with sound is output
    S23-3 - S22-13 (TMUT - GND) R-B - W-B Cellular mobile telephone is being used Below 3.5 V
    S23-6 (TX+) LG -
    S23-5 (TXD+) V -
    S23-9 - S22-13 (N-MU - GND) Y - W-B Navigation voice sounding Below 3.5 V
    S23-11 - S22-13 (R+ - GND) B - W-B CD player or cassette player is sounding A waveform synchronized with sound is output
    S23-12 - S22-13 (L+ - GND) R - W-B CD player or cassette player is sounding A waveform synchronized with sound is output
    S23-13 - S22-13 (SPD - GND) W-R - W-B -
    S23-14 - S22-13 (FR-- GND) L-R - W-B Audio system is sounding A waveform synchronized with sound is output
    S23-15 - S22-13 (FL-- GND) G - W-B Audio system is sounding A waveform synchronized with sound is output
    S23-18 (TXD-) P -
    S23-19 (TX-) G-R -
    S23-20 - S22-13 (ACC - GND) GR - W-B Ignition switch OFF Below 1 V
    Ignition switch ACC or ON 10 - 14 V
    S23-21 - S22-13 (MUTE - GND) L-W - W-B Switching CD player --> Cassette player Below 3.5 V
    S23-23 - S22-13 (R-- GND) W - W-B CD player or cassette player is sounding A waveform synchronized with sound is output
    S23-24 - S22-13 (L - GND) G - W-B CD player or cassette player is sounding A waveform synchronized with sound is output
  3. AUDIO DOOR CONTROL SWITCH 
    Fig 3: Identifying ECU Terminals - Audio Door Control Switch
    G03386709Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINALS VOLTAGE SPECIFICATIONS

    Symbols (Terminals No.) Wiring Color Condition STD Voltage (V)
    A25-8 - A25-6 (DOS1 - GND) L - W-B Audio door control switch ON 10 - 14 V
    A25-6 - Body ground (GND - Body ground) W-B - Body ground Constant Below 1 V
    A25-4 - A25-6 (ACC - GND) GR - W-B Ignition switch OFF Below 1 V
    Ignition switch ACC or ON 10 - 14 V
    A25-10 - A25-6 (+B-- GND) V - W-B Constant 10 - 14 V
  4. STEERING PAD SWITCH MODULATOR 
    Fig 4: Identifying ECU Terminals - Steering Pad Switch Modulator
    G03386710Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINALS VOLTAGE SPECIFICATIONS

    Terminal No. (Symbols) Wiring Color Condition STD Voltage (v)
    1 - Body ground (+B - Body ground) L-Y - W-B Constant 10 - 14 V
    4 - Body ground (ECC2 - Body ground) BR - Body ground Constant Below 1 V
    5 (MPX) V-G Multiplex communication circuit -
    6 - Body ground (TLSW - Body ground) P - W-B Steering pad switch OFF Below 5 V
    "3" switch ON Below 3.8 V
    "2" switch ON Below 2.5 V
    "1" switch ON Below 1.2 V
    "TEL" switch ON Below 0 V
scientia non olet · About LEMON Manuals