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Terminals Of Ecu

  1. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY 
    Fig 1: Identifying Display And Navigation Module Display Connector Terminals
    G05763285Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the F28 display connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      ECU TERMINALS REFERENCE

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F28-1 (+B1) - F28-10 (GND1) R - W-B Battery Always 11 to 14 V
      F28-2 (ACC) - F28-10 (GND1) GR - W-B Accessory (ON) Engine switch off Below 1 V
      F28-2 (ACC) - F28-10 (GND1) GR - W-B Accessory (ON) Engine switch on (ACC) 11 to 14 V
      F28-3 (IG) - F28-10 (GND1) G - W-B Ignition (ON) Engine switch off Below 1 V
      F28-3 (IG) - F28-10 (GND1) G - W-B Ignition (ON) Engine switch on (IG) 11 to 14 V
      F28-10 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the F28 display connector.
    4. Measure the voltage according to the value(s) in the table below.
      ECU TERMINALS REFERENCE

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F27-1 (TX-) - F28-10 (GND1) L-W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3V
      F27-2 (TX+) - F28-10 (GND1) W-W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3V
      F27-3 (TX2-) - F28-10 (GND1) L-W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3V
      F27-4(TX2+) - F28-10 (GND1) W-W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3V
      F27-5 (TSW-) - F28-10 (GND1) BR - W-B Telephone relation switch signal Always Below 1 V
      F27-9 (MACC) - F28-10 (GND1)(1) Y-W-B Microphone amplifier power supply Engine switch off Below 1 V
      F27-9(MACC) - F28-10 (GND1)(1) Y-W-B Microphone amplifier power supply Engine switch on (IG) 5V
      F27-10 (MIN-) - F28-10 (GND1) R-W-B Microphone voice signal See "Microphone & Voice Recognition Check" (See OPERATION CHECK  ) -
      F27-11 (MIN+) - F28-10 (GND1) G-W-B Microphone voice signal See "Microphone & Voice Recognition Check" (See OPERATION CHECK  ) -
      F27-12 (SGND) - F28-10 (GND1) BR - W-B Signal ground Always Below 1 V
      F27-13 (CA+) - F28-10 (GND1)(2) B-W-B Television camera power supply Engine switch on (IG), shift lever moved to R 5.8 to 6.5 V
      F27-14 (CGND) - Body ground(2) W - Body ground Ground Always Below 1 V
      F27-21 (IVO-) - F28-10 (GND1) B-W-B Voice guidance signal Voice guidance provided Waveform synchronized with sounds is output
      F27-22 (IVO+) - F28-10 (GND1) W-W-B Voice guidance signal Voice guidance provided Waveform synchronized with sounds is output
      F27-23 (SLD) - F28-10 (GND1) Shielded - W-B Shielded ground Always Below 1 V
      F27-27 (V+) - F27-28 (V-)(2) R-W Television camera image signal Engine switch on (IG), shift lever moved to R Pulse generation (refer to  ewaveform 1)
      F27-28 (V-) - F27-14 (CGND)(2) Shielded - W Shielded ground Always Below 1 V
      F28-5 (HILL) - F28-10 (GND1) W-W-B Illumination signal Light control switch off Below 1 V
      F28-5 (HILL) - F28-10 (GND1) W-W-B Illumination signal Light control switch on 11 to 14 V
      F28-7 (TC) - F28-10 (GND1) V-W-B Diagnosis ON signal Engine switch on (IG) 9 to 14 V
      F28-8 (HAZ) - F28-10 (GND1) O-W-B Hazard warning signal Hazard warning switch off Below 1 V
      Hazard warning switch on 11 to 14 V
      F28-9 (ARON) - F28-10 (GND1) W-W-B Front passenger side airbag ON/OFF indicator signal Passenger airbag ON/OFF indicator off Below 2 V
      Passenger airbag ON/OFF indicator on 11 to 14 V
      F28-12 (ILL+) - F28-10 (GND1) G-W-B Illumination signal Light control switch off Below 1 V
      F28-12 (ILL+) - F28-10 (GND1) G-W-B Illumination signal Light control switch on 11 to 14 V
      F28-13 (REV) - F28-10 (GND1) L - W-B Reverse signal See "Vehicle Signal Check" Mode (See OPERATION CHECK  ) -
      F28-14 (SPD) - F28-10 (GND1) V - W-B Speed signal from combination meter See "Vehicle Signal Check" Mode (See OPERATION CHECK  ) -
      F28-20 (AIR) - F28-10 (GND1) B-W-B Front passenger side airbag ON/OFF indicator signal Passenger airbag ON/OFF indicator off Below 2 V
      Passenger airbag ON/OFF indicator on 10.5 to 16 V
      F28-21 (PBEW) - F28-10 (GND1) Y-W-B Passenger seat belt signal Passenger seat occupied, seat belt fastened 11 to 14 V
      Passenger seat occupied, seat belt unfastened Below 2 V
      F28-23 (PKB) - F28-10 (GND1) Y-W-B Parking brake signal See "Vehicle Signal Check" Mode (See OPERATION CHECK  ) -
      F28-24 (HFOF) - F28-10 (GND1) B-W-B Phone mute Engine switch on (IG) 3.3 to 5.0 V
      F29-1 (VV+) - F28-10 (GND1) W-W-B DVD image signal DVD played on radio receiver Pulse generation (refer to  fwaveform 2)
      F29-4 (VV-) - F28-10 (GND1) B-W-B Signal ground Always Below 1 V
      F34-1 (FR+) - F28-10 (GND1)(3) B-W-B Sound signal (right) Engine switch on (ACC), audio system playing Waveform synchronized with sounds is output
      F34-2 (FR-) - F28-10 (GND1)(3) W-W-B Sound signal (right) Engine switch on (ACC), audio system playing Waveform synchronized with sounds is output
      F34-3 (FL+) - F28-10 (GND1)(3) L-W-B Sound signal (left) Engine switch on (ACC), audio system playing Waveform synchronized with sounds is output
      F34-4 (FL-) - F28-10 (GND1)(3) R-W-B Sound signal (left) Engine switch on (ACC), audio system playing Waveform synchronized with sounds is output
      F34-5 (SLD1) - F28-10 (GND1)(3) Shielded - W-B Shielded ground Always Below 1 V
      F34-7 (MUT2) - F28-10 (GND1)(3) B-W-B Mute signal Sound library playing → Changing mode 3.5 V or higher → Below 1 V
      F34-8 (MUTE) - F28-10 (GND1)(3) G-W-B Mute signal Sound library playing → Changing mode 3.5 V or higher → Below 1 V
      F34-9 (RL-) - F28-10 (GND1)(3) G-W-B Sound signal (right) Engine switch on (ACC), audio system playing Waveform synchronized with sounds is output
      F34-10 (RL+) - F28-10 (GND1)(3) R-W-B Sound signal (right) Engine switch on (ACC), audio system playing Waveform synchronized with sounds is output
      F34-11 (RR-) - F28-10 (GND1)(3) W-W-B Sound signal (left) Engine switch on (ACC), audio system playing Waveform synchronized with sounds is output
      F34-12 (RR+) - F28-10 (GND1)(3) B-W-B Sound signal (left) Engine switch on (ACC), audio system playing Waveform synchronized with sounds is output
      F34-13 (SGD2) - F28-10 (GND1)(3) Shielded - W-B Shielded ground Always Below 1 V
      F35-2 (TXO+) - F28-10 (GND1)(4) B-W-B AVC-LAN plus communication signal Engine switch on (ACC) 0.15 to 0.6 Vpp
      F35-3 (TXI+) - F28-10 (GND1) B-W-B AVC-LAN plus communication signal Engine switch on (ACC) 0.15 to 0.6 Vpp
      F35-5 (TXO-) - F28-10 (GND1)(4) W-W-B AVC-LAN plus communication signal Engine switch on (ACC) 0.15 to 0.6 Vpp
      F35-6 (TXI-) - F28-10 (GND1) W-W-B AVC-LAN plus communication signal Engine switch on (ACC) 0.15 to 0.6 Vpp
      F40-1(GVIF) - F28-10 (GND1)(2) B-W-B Digital image signal - -
      F42-1 (GVIF) - F28-10 (GND1)(3) B-W-B Digital image signal - -
      (1) w/LEXUS link system
      (2) w/o Wide view front and side monitor system
      (3) w/ Rear seat entertainment system
      (4) w/ SDARS system

      If the result is not as specified, the display and navigation module display may have a malfunction.

    5. Using an oscilloscope, check waveform 1.

      Waveform 1 (reference) 

      WAVEFORM 1 REFERENCE

      Item Content
      Terminal No. (Symbol) F27-27 (V+) - F27-28 (V-)
      Tool Setting 0.2 V/DIV., 20 μs/DIV.
      Condition Engine switch on (IG), shift lever moved to R
      Fig 2: Identifying Waveform Graph 1
      G04945285Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check waveform 2.

      Waveform 2 (reference) 

      WAVEFORM 2 REFERENCE

      Item Content
      Terminal No. (Symbol) F29-1 (VV+) - F28-10 (GND1)
      Tool Setting 0.2 V/DIV., 0.2 μs/DIV.
      Condition Disc played on radio receiver
      7. Fig 3: Identifying Waveform Graph 2
      G04945286Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK SATELLITE RADIO TUNER 
    Fig 4: Identifying Satellite Radio Tuner Connector Terminals
    G05763288Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L37 tuner connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      ECU TERMINALS REFERENCE

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L37-7 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L37-11 (ACC) - L37-7 (GND) GR - W-B ACC power supply Engine switch off Below 1 V
      L37-11 (ACC) - L37-7 (GND) GR - W-B ACC power supply Engine switch on (ACC) 11 to 14 V
      L37-12 (+B) - L37-7 (GND) L - W-B Battery Always 11 to 14 V

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the L37 tuner connector.
    4. Measure the voltage according to the value(s) in the table below.
      ECU TERMINALS REFERENCE

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L37-1 (SLD) - L37-7 (GND) Shielded - W-B Shielded Always Below 1 V
      L37-5 (FLO-) - L37-7 (GND) R - W-B Sound signal (left) Engine switch on (ACC), RSE system playing Waveform synchronized with sound is output
      L37-4 (FLO+) - L37-7 (GND) L - W-B Sound signal (left) Engine switch on (ACC), RSE system playing Waveform synchronized with sound is output
      L37-2 (FRO+) - L37-7 (GND) W - W-B Sound signal (right) Engine switch on (ACC), RSE system playing Waveform synchronized with sound is output
      L37-3 (FRO-) - L37-7 (GND) B - W-B Sound signal (right) Engine switch on (ACC), RSE system playing Waveform synchronized with sound is output
      L37-6 (MUTE) - L37-7 (GND) G - W-B Mute signal Satellite radio on → Changing mode 3.5 V or higher → Below 1 V
      L37-9 (TX+) - L37-7 (GND) G - W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3V
      L37-10(TX-) - L37-7 (GND) R - W-B AVC-LAN communication signal Engine switch on (ACC) 2 to 3V
      L38-2 (TXO+) - L37-7 (GND) B - W-B AVC-LAN plus communication signal Engine switch on (ACC) 2 to 3 V
      L38-3 (TXI+) - L37-7 (GND) B - W-B AVC-LAN plus communication signal Engine switch on (ACC) 2 to 3V
      L38-5 (TXO-) - L37-7 (GND) W - W-B AVC-LAN plus communication signal Engine switch on (ACC) 2 to 3V
      L38-6 (TXI-) - L37-7 (GND) W - W-B AVC-LAN plus communication signal Engine switch on (ACC) 2 to 3V
      L39-1 (SLD3) - L37-7 (GND) Shielded - W-B Shielded Always Below 1 V
      L39-2 (RLO-) - L37-7 (GND) R - W-B Sound signal (left) Engine switch on (ACC), RSE system playing Waveform synchronized with sound is output
      L39-3 (RLO+) - L37-7 (GND) L - W-B Sound signal (left) Engine switch on (ACC), RSE system playing Waveform synchronized with sound is output
      L39-4 (RRO-) - L37-7 (GND) W - W-B Sound signal (right) Engine switch on (ACC), RSE system playing Waveform synchronized with sound is output
      L39-5 (RRO+) - L37-7 (GND) B - W-B Sound signal (right) Engine switch on (ACC), RSE system playing Waveform synchronized with sound is output
      L39-7 (FLI-) - L37-7 (GND) R - W-B Sound signal (left) Engine switch on (ACC), sound library playing Waveform synchronized with sound is output
      L39-8 (FLI+) - L37-7 (GND) G - W-B(1)
      L - W-B(2)      		 Sound signal (left) Engine switch on (ACC), sound library playing Waveform synchronized with sound is output
      L39-9 (FRI-) - L37-7 (GND) W - W-B Sound signal (right) Engine switch on (ACC), sound library playing Waveform synchronized with sound is output
      L39-10(FRI+) - L37-7 (GND) B - W-B Sound signal (right) Engine switch on (ACC), sound library playing Waveform synchronized with sound is output
      L39-13 (MUT4) - L37-7 (GND) G - W-B Mute signal RSE system playing → Changing mode 3.5 V or higher → Below 1 V
      L39-14 (MUT3) - L37-7 (GND) G - W-B Mute signal Audio system playing → Changing mode 3.5 V or higher → Below 1 V
      L39-15 (MUT2) - L37-7 (GND) G-W-B Mute signal Sound library playing → Changing mode 3 5 V or higher → Below 1 V
      L39-17 (RRI+) - L37-7 (GND) B - W-B Sound signal (right) Engine switch on (ACC), audio system playing Waveform synchronized with sound is output
      L39-18(RRI-) - L37-7 (GND) W - W-B Sound signal (right) Engine switch on (ACC), audio system playing Waveform synchronized with sound is output
      L39-19 (RLI+) - L37-7 (GND) L - W-B Sound signal (left) Engine switch on (ACC), audio system playing Waveform synchronized with sound is output
      L39-20 (RLI-) - L37-7 (GND) R - W-B Sound signal (left) Engine switch on (ACC), audio system playing Waveform synchronized with sound is output
      (1) w/ Rear Seat Entertainment System
      (2) w/o Rear Seat Entertainment System

      If the result is not as specified, the tuner may have a malfunction.

  3. CHECK RADIO RECEIVER  (See TERMINALS OF ECU )
  4. CHECK STEREO COMPONENT AMPLIFIER  (See TERMINALS OF ECU )
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