LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2008 >> IS 250 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 45 (Navigation) >> Navigation System >> Terminals Of Ecu
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Terminals Of Ecu

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
  1. MULTI-DISPLAY 
    Fig 1: Identifying ECU Connector Terminals
    G05753576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ECU CONNECTOR TERMINALS REFERENCE

    Terminal No (Symbol) Wiring Color Terminal Description Condition Specified Condition
    J50-1 (+B1) - J50-10 (GND1) Y - W-B Battery Always 11 to 14 V
    J50-2 (ACC) - J50-10 (GND1) O - W-B Accessory (ON) Engine switch off Below 1 V
    J50-2 (ACC) - J50-10 (GND1) O - W-B Accessory (ON) Engine switch on (ACC or IG) 11 to 14 V
    J50-3 (IG) - J50-10 (GND1) B - W-B Ignition (ON) Engine switch off Below 1 V
    J50-3 (IG) - J50-10 (GND) B - W-B Ignition (ON) Engine switch on (IG) 11 to 14 V
    J50-7 (TC) - J50-10 (GND1) V - W-B Diagnosis ON signal Engine switch on (IG) 9 to 14 V
    J50-10 (GND1) - Body ground W-B - Body ground Ground Always Below 1 V
    J50-11 (ILL-) - J50-10 (GND1) W - W-B Illumination signal Light control switch OFF Below 1 V
    J50-11 (ILL-) - J50-10 (GND1) W - W-B Illumination signal Light control switch ON 11 to 14 V
    J50-12 (ILL+) - J50-10 (GND1) G - W-B Illumination signal Light control switch OFF Below 1 V
    J50-12 (ILL+) - J50-10 (GND1) G - W-B Illumination signal Light control switch ON 11 to 14 V
    J50-13 (REV) - J50-10 (GND1) L - W-B Reverse signal See "Vehicle Signal Check" Mode (See OPERATION CHECK  ) -
    J50-14 (SPD) - J50-10 (GND1) P - W-B Speed signal from combination meter See "Vehicle Signal Check" Mode (See OPERATION CHECK  ) -
    J50-19 (SEUC) - J50-10 (GND1) LG - W-B Security indicator signal Security indicator operating 11 to 14 V
    J50-23 (PKB) - J50-10 (GND1) R - W-B Parking brake signal See "Vehicle Signal Check" Mode (See OPERATION CHECK  ) -
    J51-3 (TX2-) - J51-4 (TX2+) LG - P AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    J51-5 (TSW-) - J50-10 (GND1) W-B - W-B Telephone relation switch signal Always Below 1 V
    J51-9 (MACC) - J50-10 (GND1) V - W-B Microphone AMP power supply Engine switch off Below 1 V
    J51-9 (MACC) - J50-10 (GND1) V - W-B Microphone AMP power supply Engine switch on (IG) 4 5 to 5 5 V
    J51-10 (MIN-) - J50-10 (GND1) BR - W-B Microphone voice signal See "Microphone & Voice Recognition Check" (See OPERATION CHECK  ) -
    J51-11 (MIN+) - J50-10 (GND1) Y - W-B Microphone voice signal See "Microphone & Voice Recognition Check" (See OPERATION CHECK  ) -
    J51-12 (SGND) - J50-10 (GND1) W-B - W-B Signal ground Always Below 1 V
    J51-13 (CA+) - J50-10 (GND1) B - W-B Television camera power supply Engine switch on (IG), shift lever in R 5 5 to 6 5 V
    J51-14 (CGND) - Body ground W - Body ground Ground Always Below 1 V
    J51-17 (TX3-) - J51-18 (TX3+) O - SB AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    J51-21 (IVO-) - J50-10 (GND1) BR - W-B Voice guidance signal Voice guidance is provided A waveform synchronized with sounds is output
    J51-22 (IVO+) - J50-10 (GND1) Y - W-B Voice guidance signal Voice guidance is provided A waveform synchronized with sounds is output
    J51-23 (SLD) - J50-10 (GND1) Shielded - W-B Shielded ground Always Below 1 V
    J51-27 (V+) - J51-14 (CGND) R - W Television camera image signal Engine switch on (IG), shift lever in R Pulse generation (Refer to  awaveform 1)
    J51-28 (V-) - J51-14 (CGND) Shielded - W Shielded ground Always Below 1 V
    J52-1 (NTSC) - J50-10 (GND1) R - W-B DVD image signal DVD is played on radio receiver Pulse generation (Refer to  bwaveform 2)
    J52-4 (SGD1) - J50-10 (GND1) G - W-B Signal ground Always Below 1 V
    J52-5 (SGND) - Body ground Shielded - Body ground Shielded ground Always Below 1 V
    p1-1 (TX4-) - p1-2 (TX4+) W-B - W-R AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    p1-3 (SGND) - p1-6 (GND2) Shielded - B Shielded ground Always Below 1 V
    p1-4 (MCO-) - p1-6 (GND2) L - B Microphone voice signal See "Microphone & Voice Recognition Check" (See OPERATION CHECK  ) -
    p1-5 (MCO+) - p1-6 (GND2) R - B Microphone voice signal See "Microphone & Voice Recognition Check" (See OPERATION CHECK  ) -
    p1-6 (GND2) - Body ground B - Body ground Ground Always Below 1 V
    p1-7 (ACC2) - p1-6 (GND2) O - B Accessory (ON) Engine switch off Below 1 V
    p1-7 (ACC2) - p1-6 (GND2) O - B Accessory (ON) Engine switch on (ACC) 11 to 14 V
    p1-8 (+B) - p1-6 (GND2) R - B Battery Always 11 to 14 V
    p1-10 (SI-) - p1-6 (GND2) L - B Voice guidance signal Voice guidance is provided A waveform synchronized with sounds is output
    p1-11 (SI+) - p1-6 (GND2) R - B Voice guidance signal Voice guidance is provided A waveform synchronized with sounds is output
    p1-15 (REV2) - p1-6 (GND2) GR - B Reverse signal See "Vehicle Sensors" Mode (See OPERATION CHECK  ) -
    p1-16 (SPD2) - p1-6 (GND2) W - B Speed signal See "Vehicle Sensors" Mode (See OPERATION CHECK  ) -
    q1-1 (GVl+) - p1-6 (GND2) B - B Digital image signal Navigation display is on Pulse generation
    q1-2 (GVI-) - p1-6 (GND2) B - B Digital image signal Navigation display is on Pulse generation
    q1-3 (GVG1) - Body ground B - B Ground Always Below 1 V
    1. Reference waveform 1

      HINT

      • Terminal V+(J51-27)-CGND (J51-14)
      • Gauge set 0 2 V/DIV, 50 μs/DIV
      • Condition Engine switch IG, shift lever R
        Fig 2: Identifying Waveform 1
        G05753577Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reference waveform 2

      HINT.

      • Terminal NTSC(J52-1)-Body ground
      • Gauge set 200 mV/DIV, 10 μs/DIV
      • Condition DVD is played on multi-display
      Fig 3: Identifying Waveform 2
      G04945286Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. NAVIGATION ECU 
    Fig 4: Identifying Navigation ECU Connector Terminals
    G05753579Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NAVIGATION ECU CONNECTOR TERMINALS REFERENCE

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    p2-1 (+B) - p2-15 (GND1) R - B Battery Always 11 to 14 V
    p2-4 (SPD) - p2-15 (GND1) W - B Speed signal See "Vehicle Sensors" Mode (See OPERATION CHECK  ) -
    p2-7 (SLD1) - p2-15 (GND1) Shielded - B Shielded ground Always Below 1 V
    p2-8 (VOI-) - p2-15 (GND1) L - B Voice guidance signal Voice guidance is provided A waveform synchronized with sounds is output
    p2-9 (VOI+) - p2-15 (GND1) R - B Voice guidance signal Voice guidance is provided A waveform synchronized with sounds is output
    p2-13 (ACC) - p2-15 (GND1) O - B Accessory (ON) Engine switch off Below 1 V
    p2-13 (ACC) - p2-15 (GND1) O - B Accessory (ON) Engine switch on (ACC) 11 to 14 V
    p2-15 (GND1) - Body ground B - Body ground Ground Always Below 1 V
    p2-18 (TX-) - p2-19 (TX+) W-B - W-R AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    p2-20 (REV) - p2-15 (GND1) GR - B Reverse signal See "Vehicle Sensors" Mode (See OPERATION CHECK  ) -
    p3-3 (MIC+) - p2-15 (GND1) R - B Microphone voice signal See "Microphone & Voice Recognition Check" (See OPERATION CHECK  ) -
    p3-5 (MIC-) - p2-15 (GND1) L - B Microphone voice signal See "Microphone & Voice Recognition Check" (See OPERATION CHECK  ) -
    q2-1 (GVO+) - q2-3 (GVG2) B - B Digital image signal Navigation display is on Pulse generation
    q2-2 (GVO-) - q2-3 (GVG2) B - B Digital image signal Navigation display is on Pulse generation
    q2-3 (GVG2) - Body ground B - Body ground Ground Always Below 1 V
  3. GATEWAY ECU 
    Fig 5: Identifying ECU Connector Terminals (Gateway)
    G05753580Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ECU CONNECTOR TERMINALS REFERENCE

    Terminal No (Symbol) Wiring Color Terminal Description Condition Specified Condition
    J76-1 (IG) - J76-24 (GND) B - W-B Ignition (ON) Engine switch off Below 1 V
    J76-1 (IG) - J76-24 (GND) B - W-B Ignition (ON) Engine switch on (IG) 11 to 14 V
    J76-2 (ACC) - J76-24 (GND) O - W-B Accessory (ON) Engine switch off Below 1 V
    J76-2 (ACC) - J76-24 (GND) O - W-B Accessory (ON) Engine switch on (ACC) 11 to 14 V
    J76-21 (GTX-) - J76-6 (GTX+) O - SB AVC-LAN communication signal Engine switch on (ACC) 2 to 3 V
    J76-10 (BATT) - J76-24 (GND) LG - W-B Battery Always 11 to 14 V
    J76-24 (GND) - Body ground W-B - Body ground Ground Always Below 1 V
  4. RADIO RECEIVER  (See TERMINALS OF ECU )
  5. STEREO COMPONENT AMPLIFIER  (See TERMINALS OF ECU )
scientia non olet · About LEMON Manuals