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Terminals Of Ecu

WARNING: This page is about a different car, the 2012 Lexus LS 460. 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 Assembly Connector Terminal Identification
    GTY287349Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    L113-3 (ILL+) - L113-15 (GND) G - W-B Illumination signal Light control switch off Below 1 V
    Light control switch tail 11 to 14 V
    L113-5 (AUXI) - L113-15 (GND) BR - W-B External device connection detection signal External device connected Below 1 V
    L113-6 (AGND) - Body ground Shielded - Body ground Shielded ground Always Below 1 V
    L113-7 (SLD) - Body ground* Shielded - Body ground Shielded ground Always Below 1 V
    L113-8 (NTSC) - L113-15 (GND)* W - W-B RSE image signal DVD playing Waveform synchronized with display signal is output
    L113-9 (MI+) R MOST communication signal - -
    L113-10 (SLDI) - Body ground L - Body ground Shield ground Always Below 1 V
    L113-11 (MO+) B MOST communication signal - -
    L113-12 (WUI) - L113-15 (GND) GR - W-B MOST communication wake up signal Engine switch on (ACC) 4.5 V or higher
    L113-14 (B) - L113-15 (GND) L - W-B Battery Always 11 to 14 V
    L113-15 (GND) - Body ground W-B - Body ground Ground Always Below 1 V
    L113-17 (ILL-) - L113-15 (GND) LG - W-B Illumination (rheostat) signal Light control switch off Below 1 V
    Light control switch tail Pulse generation
    L113-19 (ARI) - L113-15 (GND) W - W-B Sound signal (Right) External device playing (When stereo jack used) Waveform synchronized with sound is output
    L113-20 (ALI) - L113-15 (GND) B - W-B Sound signal (Left) External device playing (When stereo jack used) Waveform synchronized with sound is output
    L113-21 (ASGN) - L113-15 (GND) R - W-B Shield ground Always Below 1 V
    L113-22 (GND) - L113-15 (GND)* B - W-B Shield ground Always Below 1 V
    L113-23 (MI-) G MOST communication signal - -
    L113-24 (SLDI) - Body ground BR - Body ground Shield ground Always Below 1 V
    L113-25 (MO-) W MOST communication signal - -
    L113-26 (WUO) - L113-15 (GND) Y - W-B MOST communication wake up signal Engine switch on (ACC) 4.5 V or higher
    RA-5 (ANT+) - L113-15 (GND) BR - W-B Power source of antenna Engine switch on (ACC), radio switch on and AM or FM 11 to 14 V
    • *: w/ for DVD Changer Models
  2. CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY (for CD Changer Models) 
    Fig 2: Identifying Stereo Component Amplifier Assembly Connector Terminal Identification (For CD Changer Models)
    GTY393665Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    R39-7 (CTR-) - R38-2 (GND) V - W-B Sound signal Audio system playing Waveform synchronized with sound is output
    R39-8 (CTR+) - R38-2 (GND) P - W-B Sound signal Audio system playing Waveform synchronized with sound is output
    R36-2 (WFR-) - R38-2 (GND) Y - W-B Sound signal Audio system playing Waveform synchronized with sound is output
    R36-6 (WFL+) - R38-2 (GND) Y - W-B Sound signal Audio system playing Waveform synchronized with sound is output
    R36-8 (WFL-) - R38-2 (GND) B - W-B Sound signal Audio system playing Waveform synchronized with sound is output
    R36-10 (WFR+) - R38-2 (GND) B - W-B Sound signal Audio system playing Waveform synchronized with sound is output
    R36-4 (TWL+) - R38-2 (GND) W - W-B Sound signal Audio system playing Waveform synchronized with sound is output
    R36-5 (TWR+) - R38-2 (GND) V - W-B Sound signal Audio system playing Waveform synchronized with sound is output
    R36-11 (TWL-) - R38-2 (GND) R - W-B Sound signal Audio system playing Waveform synchronized with sound is output
    R36-12 (TWR-) - R38-2 (GND) P - W-B Sound signal Audio system playing Waveform synchronized with sound is output
    R38-1 (+B) - R38-2 (GND) GR - W-B Battery Audio system playing Waveform synchronized with sounds is output
    R38-2 (GND) - Body ground W-B - Body ground Ground Audio system playing Waveform synchronized with sound is output
    R38-3 (+B2) - R38-2 (GND) B - W-B Battery Always 11 to 14 V
    R38-6 (GND2) - Body ground W-B - Body ground Ground Always Below 1 V
    R39-4 (FR+) - R38-2 (GND) B - W-B Sound signal Audio system plying Waveform synchronized with sounds is output.
    R39-10 (FR-) - R38-2 (GND) Y - W-B Sound signal Audio system plying Waveform synchronized with sound is output.
    R60-2 (SPD) - R38-2 (GND) V - W-B Speed signal from combination meter assembly Engine switch on (IG), drive wheels turned slowly Pulse generation
    R60-3 (WUI) - Body ground Y - Body ground MOST communication wake up signal Engine switch on (ACC) 4.5 V or higher
    R60-4 (MI+) B MOST communication signal - -
    R60-5 (SLDI) - Body ground BR - Body ground Shield ground Always Below 1 V
    R60-6 (MO+) Y MOST communication signal - -
    R60-7 (TMUT) - R38-2 (GND) SB - W-B Mute signal Audio system playing Below 0.5 V
    Emergency call mode Above 2.5 V
    R60-9 (WUO) - Body ground SB - Body ground MOST communication wake up signal Engine switch on (ACC) 4.5 V or higher
    R60-10 (MI-) W MOST communication signal - -
    R60-11 (SLDO) - Body ground V - Body ground Shield ground Always Below 1 V
    R60-12 (MO-) L MOST communication signal - -
  3. CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY (for DVD Changer Models) 
    Fig 3: Identifying Stereo Component Amplifier Assembly Connector Terminal Identification (For DVD Changer Models)
    GTY348805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the resistance and voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      R35-1 (SL+) - R38-2 (GND) B - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R35-2 (SR+) - R38-2 (GND) B - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R35-3 (RL+) - R38-2 (GND) P - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R35-4 (RR+) - R38-2 (GND) W - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R35-5 (SL-) - R38-2 (GND) Y - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R35-6 (SR-) - R38-2 (GND) Y - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R39-7 (CTR-) - R38-2 (GND) V - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R39-8 (CTR+) - R38-2 (GND) P - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R35-9 (RL-) - R38-2 (GND) Y - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R35-10 (RR-) - R38-2 (GND) R - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R36-2 (WFR-) - R38-2 (GND) Y - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R36-4 (TWL+) - R38-2 (GND) W - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R36-5 (TWR+) - R38-2 (GND) V - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R36-6 (WFL+) - R38-2 (GND) Y - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R36-8 (WFL-) - R38-2 (GND) B - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R36-10 (WFR+) - R38-2 (GND) B - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R36-11 (TWL-) - R38-2 (GND) R - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R36-12 (TWR-) - R38-2 (GND) P - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R38-1 (+B) - R38-2 (GND) GR - W-B Battery Always 11 to 14 V
      R38-2 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      R38-3 (+B2) - R38-2 (GND) B - W-B Battery Always 11 to 14 V
      R38-6 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      R39-1 (WF1+) - R38-2 (GND) B - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R39-2 (WF2+) - R38-2 (GND) W - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R39-3 (FL+) - R38-2 (GND) L - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R39-4 (FR+) - R38-2 (GND) B - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R39-5 (WF1-) - R38-2 (GND) Y - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R39-6 (WF2-) - R38-2 (GND) R - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R39-9 (FL-) - R38-2 (GND) LG - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R39-10 (FR-) - R38-2 (GND) Y - W-B Sound signal Audio system playing Waveform synchronized with sound is output
      R60-2 (SPD) - R38-2 (GND) V - W-B Speed signal from combination meter assembly Engine switch on (IG), drive wheels turned slowly Pulse generation
      R60-3 (WUI) - Body ground Y - Body ground MOST communication wake up signal Engine switch on (ACC) 4.5 V or higher
      R60-4 (MI+) B MOST communication signal - -
      R60-5 (SLDI) - Body ground BR - Body ground Shield ground Always Below 1 V
      R60-6 (MO+) Y MOST communication signal - -
      R60-7 (TMUT) - R38-2 (GND) SB - W-B Mute signal Audio system playing Below 1 V
      Emergency call mode 3.5 V or higher
      R60-9 (WUO) - Body ground SB - Body ground MOST communication wake up signal Engine switch on (ACC) 4.5 V or higher
      R60-10 (MI-) W MOST communication signal - -
      R60-11 (SLDO) - Body ground V - Body ground Shield ground Always Below 1 V
      R60-12 (MO-) L MOST communication signal - -
  4. CHECK MULTIMEDIA INTERFACE ECU 
    Fig 4: Identifying Multimedia Interface ECU Connector Terminal Identification
    GTY254483Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the resistance and voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      R65-1 (USD1) - Body ground Shielded - Body ground Shield ground Always Below 1 V
      R65-2 (URO+) - R65-7 (GND) W - BR USB audio system sound signal USB audio system playing Waveform synchronized with sound is output
      R65-3 (ULO+) - R65-7 (GND) B - BR USB audio system sound signal USB audio system playing Waveform synchronized with sound is output
      R65-4 (UGD1) - R65-7 (GND) R - BR USB audio system sound signal USB audio system playing Waveform synchronized with sound is output
      R65-7 (GND) - Body ground BR - Body ground Ground Always Below 1 V
      R65-11 (ACC) - R65-7 (GND) BE - BR Accessory (ON) Engine switch off Below 1 V
      Engine switch on (ACC) 11 to 14 V
      R65-12 (+B) - R65-7 (GND) LG - BR Battery Always 11 to 14 V
      R66-1 (VRI) - R66-10 (VGN) W - R Aux sound signal (right) External device is playing (When stereo jack is used) Waveform synchronized with sound is output
      R66-9 (VLI) - R66-10 (VGN) B - R Aux sound signal (left) External device is playing (When stereo jack is used) Waveform synchronized with sound is output
      R66-10 (VGN) - Body ground R - Body ground Ground Always Below 1 V
      R66-2 (SGND) - Body ground Shielded - Body ground Shield ground Always Below 1 V
      h1-1 (UPO) - h1-4 (UESG) - Battery Always 5 V
      h1-2 (UDI-) - h1-4 (UESG) - Data signal USB device or "iPod" connected -
      h1-3 (UDI+) - h1-4 (UESG) - Data signal USB device or "iPod" connected -
      h1-4 (UESG) - Body ground - Ground Always Below 1 V
  5. CHECK REAR POWER SEAT SWITCH (except 4-Passenger with Ottoman) 
    Fig 5: Identifying Rear Power Seat Switch Connector Terminal Identification (Except 4-Passenger With Ottoman)
    GTY285065Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the resistance and voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      r2-3 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      r2-4 (MPX+) - r2-3 (E) G - W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
      r2-5 (MPX-) - r2-3 (E) R - W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
      r2-11 (B) - r2-3 (E) W - W-B Battery Always 11 to 14 V
      • If the result is not as specified, the controller may have a malfunction.
  6. CHECK REAR POWER SEAT SWITCH (for 4-Passenger with Ottoman) 
    Fig 6: Rear Power Seat Module Switch Connector Terminal Identification (For 4-Passenger With Ottoman)
    GTY152153Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the resistance and voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      S15-5 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      S15-6 (B) - S15-5 (E) W - W-B Battery Always 11 to 14 V
      S15-10 (MPX+) - S15-5 (E) R - W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
      S15-11 (MPX-) - S15-5 (E) BR - W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
      • If the result is not as specified, the module may have a malfunction.
  7. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY (w/ Navigation System [for DVD]) 
  8. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY (w/ Navigation System [for HDD]) 
  9. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY (w/o Navigation System) 
  10. CHECK TELEMATICS TRANSCEIVER 
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