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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Audio / Video System - Diagnostics - Introduction (2 Of 2) >> Audio And Visual System >> Terminals Of Ecu [12/2019 - 10/2022] >> Terminals Of Ecu [12/2019 - 10/2022]

Terminals Of Ecu [12/2019 - 10/2022]

HINT: 

Check from the rear of the connector while it is connected to the components.

  1. RADIO AND DISPLAY RECEIVER ASSEMBLY 
    GTY917829Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Terminal No. (Symbol) Terminal Description Condition Specified Condition
    H9-1 (FR+) - H1-1 (GND1) Sound signal (Front right)*1
    Sound signal (Right)*2    		 Audio system playing A waveform synchronized with sound signals is output
    H9-2 (FL+) - H1-1 (GND1) Sound signal (Front left)*1
    Sound signal (Left)*2    		 Audio system playing A waveform synchronized with sound signals is output
    H9-3 (RL+) - H1-1 (GND1) Sound signal (Rear left)*1
    Voice signal*2    		 Audio system playing*1
    Voice guidance sounding*2    		 A waveform synchronized with sound signals is output*1
    A waveform synchronized with voice signals is output*2
    H9-4 (RR+) - H1-1 (GND1)*1 Sound signal (Rear right) Audio system playing A waveform synchronized with sound signals is output
    H9-6 (FR-) - H1-1 (GND1) Sound signal (Front right)*1
    Sound signal (Right)*2    		 Audio system playing A waveform synchronized with sound signals is output
    H9-7 (FL-) - H1-1 (GND1) Sound signal (Front left)*1
    Sound signal (Left)*2    		 Audio system playing A waveform synchronized with sound signals is output
    H9-8 (RL-) - H1-1 (GND1) Sound signal (Rear left)*1
    Voice signal*2    		 Audio system playing*1
    Voice guidance sounding*2    		 A waveform synchronized with sound signals is output*1
    A waveform synchronized with voice signals is output*2
    H9-9 (RR-) - H1-1 (GND1)*1 Sound signal (Rear right) Audio system playing A waveform synchronized with sound signals is output
    H1-1 (GND1) - Body ground Ground Always Below 1 Ω
    H1-4 (+B1) - H1-1 (GND1) Power source (+B) Ignition switch off*7
    Always*8    		 11 to 14 V*9
    10.5 to 16 V*10
    H1-5 (TX1+)*2 AVC-LAN communication signal - -
    H1-6 (TX1-)*2 AVC-LAN communication signal - -
    H1-15 (ACC1) - H1-1 (GND1) Power source (ACC) Ignition switch off Below 1 V
    Ignition switch ACC 11 to 14 V*9
    10.5 to 16 V*10
    H1-19 (TX+)*6 AVC-LAN communication signal - -
    H1-20 (TX-)*6 AVC-LAN communication signal - -
    H1-21 (SW1) - H1-24 (SWG) Steering pad switch signal No switch pushed 2.97 to 3.56 V
    Seek+ switch pushed 0.27 to 0.35 V
    Seek- switch pushed 0.86 to 1.03 V
    Volume+ switch pushed 1.51 to 1.79 V
    Volume- switch pushed 2.22 to 2.66 V
    H1-22 (SW2) - H1-24 (SWG) Steering pad switch signal No switch pushed 2.97 to 3.56 V
    MODE switch pushed 0.27 to 0.35 V
    On/off hook switch pushed 1.51 to 1.79 V
    Voice switch pushed 2.22 to 2.66 V
    H1-24 (SWG) - Body ground Steering pad switch ground Always Below 1 Ω
    H1-25 (MUT1) - H1-1 (GND1)*2 Mute signal Audio system playing 2 V or higher
    Audio system changing modes Below 1 V
    H1-27 (SPD) - H1-1 (GND1) Vehicle speed signal See "Vehicle Signal Check Mode" in Operation Check
    Refer to OPERATION CHECK [12/2019 - 10/2022]    		 -
    H1-28 (REV) - H1-1 (GND1) Reverse signal See "Check Vehicle Signal" in Operation Check
    Refer to OPERATION CHECK [12/2019 - 10/2022]    		 -
    H2-3 (TMUT) - H1-1 (GND1)*1*4 Mute signal Audio system playing Above 2 V
    Emergency call mode Below 1 V
    H2-5 (CNH1)*11 Local bus communication signal - -
    H2-6 (CNL1)*11 Local bus communication signal - -
    H2-13 (CANH) CAN communication signal - -
    H2-14 (CANL) CAN communication signal - -
    H2-15 (ILL+) - H1-1 (GND1) Illumination signal Light control switch off Below 1 V
    Ignition switch off
    Light control switch in tail or head position    		 11 to 14 V
    H2-16 (ILL-) - H1-1 (GND1) Illumination signal Light control switch off Below 1 V
    Light control switch in tail or head position Pulse generation
    H2-19 (IG) - H1-1 (GND1) Power source (IG) Ignition switch off Below 1 V
    Ignition switch ON 11 to 14 V
    H2-20 (PKB) - H1-1 (GND1) Parking brake signal See "Check Vehicle Signal" in Operation Check
    Refer to OPERATION CHECK [12/2019 - 10/2022]    		 -
    H2-21 (MIN+) - H1-1 (GND1) Microphone voice signal See "Check Microphone" in Operation Check
    Refer to OPERATION CHECK [12/2019 - 10/2022]    		 -
    H2-22 (MIN-) - H1-1 (GND1) Microphone voice signal See "Check Microphone" in Operation Check
    Refer to OPERATION CHECK [12/2019 - 10/2022]    		 -
    H2-23 (MACC) - H1-1 (GND1)*3 Microphone power supply Microphone power supply Below 1 V
    Ignition switch ACC 4 to 6 V
    H2-24 (SGND) - Body ground Shield ground Always Below 1 Ω
    H2-25 (SNS2) - H1-1 (GND1) Microphone connection detection signal Always Below 1 V
    H2-26 (CSLD) - Body ground*5 Shield ground Always Below 1 V
    H2-27 (CGND) - Body ground*5 Camera ground Always Below 1 V
    H2-28 (V+) - H1-1 (GND1)*5 Video signal Ignition switch ON
    Shift lever in R
    Camera lens not covered, displaying an image    		 Pulse generation
    (Refer to waveform 1)
    Ignition switch ON
    Shift lever in R
    Camera lens covered, blacking out screen    		 Pulse generation
    (Refer to waveform 2)
    H2-29 (V-) - H1-1 (GND1)*5 Ground Always Below 1 V
    H2-30 (CA+) - H1-1 (GND1)*5 Rear television camera assembly power supply Ignition switch ACC 5.5 to 7.05 V
    H100-1 (USV1) Power source - -
    H100-2 (US1-) Data signal - -
    H100-3 (US1+) Data signal - -
    H100-4 (UGD1) Ground - -
    H100-5 (USG1) Shield ground Always Below 1 Ω
    c1-1 (US4+)*4 Data signal - -
    c1-2 (US4-)*4 Data signal - -
    c1-3 (UGD4)*4 Ground - -
    H3-10 (USBV) - H1-1 (GND1)*4 DCM (telematics transceiver) power supply Ignition switch off Below 1 V
    Ignition switch ACC 4.75 to 5.25 V
    H3-11 (USBG) - Body ground*4 Ground Always Below 1 Ω
    RA-5 (ANT+) - H1-1 (GND1) Power source of antenna Ignition switch ACC
    Radio switch on and AM or FM selected    		 11 to 14 V
    1. *1: w/o Stereo Component Amplifier
    2. *2: w/ Stereo Component Amplifier
    3. *3: w/o Telematics Transceiver
    4. *4: w/ Telematics Transceiver
    5. *5: w/ Rear View Monitor System or Parking Assist Monitor System
    6. *6: w/ Rear Seat Entertainment System
    7. *7: for HV Model
    8. *8: for Gasoline Model
    9. *9: w/o Stop and Start System
    10. *10: w/ Stop and Start System
    11. *11: w/ Audio Tab Function for Combination Meter Assembly
    1. Reference (Oscilloscope waveform): (w/ Rear View Monitor System or Parking Assist Monitor System)
      1. Waveform 1 (camera lens not covered, displaying an image)
        Item Content
        Measurement terminal H2-28 (V+) - H2-29 (V-)
        Measurement setting 200 mV/DIV., 50 μs/DIV.
        Condition Ignition switch ON, shift lever in R

        HINT: 

        • The video waveform changes according to the image sent by the rear television camera assembly.
        • The video waveform is constantly output when the ignition switch is turned to ACC.
        GTY377768Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Waveform 1 (camera lens not covered, displaying an image)
        *b Waveform 2 (camera lens covered, blacking out the screen)
        *c Synchronization Signal
        *d Video Waveform
      2. Waveform 2 (camera lens covered, blacking out the screen)
        Item Content
        Measurement terminal H2-28 (V+) - H2-29 (V-)
        Measurement setting 200 mV/DIV., 50 μs/DIV.
        Condition Ignition switch ON, shift lever in R

        HINT: 

        • The video waveform changes according to the image sent by the rear television camera assembly.
        • The video waveform is constantly output when the ignition switch is turned to ACC.
  2. STEREO COMPONENT AMPLIFIER ASSEMBLY (w/ Stereo Component Amplifier Assembly) 
    GTY883787Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Terminal No. (Symbol) Terminal Description Condition Specified Condition
    M37-1 (+B) - M37-3 (GND) Power source (+B) Always 11 to 14 V
    M37-3 (GND) - Body ground Ground Always Below 1 V
    M37-4 (RL+) - M37-3 (GND) Sound signal (Rear left) Audio system playing A waveform synchronized with sound signals is output
    M37-5 (SL+) - M37-3 (GND) Sound signal (Rear left) Audio system playing A waveform synchronized with sound signals is output
    M37-7 (WF2+) - M37-3 (GND) Sound signal (Woofer) Audio system playing A waveform synchronized with sound signals is output
    M37-8 (WF1+) - M37-3 (GND) Sound signal (Woofer) Audio system playing A waveform synchronized with sound signals is output
    M37-9 (SR+) - M37-3 (GND) Sound signal (Rear right) Audio system playing A waveform synchronized with sound signals is output
    M37-11 (FL+) - M37-3 (GND) Sound signal (Front left) Audio system playing A waveform synchronized with sound signals is output
    M37-12 (RR+) - M37-3 (GND) Sound signal (Rear right) Audio system playing A waveform synchronized with sound signals is output
    M37-13 (TWL+) - M37-3 (GND) Sound signal (Front left) Audio system playing A waveform synchronized with sound signals is output
    M37-14 (TWR+) - M37-3 (GND) Sound signal (Front right) Audio system playing A waveform synchronized with sound signals is output
    M37-15 (FR+) - M37-3 (GND) Sound signal (Front right) Audio system playing A waveform synchronized with sound signals is output
    M37-19 (RL-) - M37-3 (GND) Sound signal (Rear left) Audio system playing A waveform synchronized with sound signals is output
    M37-20 (SL-) - M37-3 (GND) Sound signal (Rear left) Audio system playing A waveform synchronized with sound signals is output
    M37-22 (WF2-) - M37-3 (GND) Sound signal (Woofer) Audio system playing A waveform synchronized with sound signals is output
    M37-23 (WF1-) - M37-3 (GND) Sound signal (Woofer) Audio system playing A waveform synchronized with sound signals is output
    M37-24 (SR-) - M37-3 (GND) Sound signal (Rear right) Audio system playing A waveform synchronized with sound signals is output
    M37-26 (FL-) - M37-3 (GND) Sound signal (Front left) Audio system playing A waveform synchronized with sound signals is output
    M37-27 (RR-) - M37-3 (GND) Sound signal (Rear right) Audio system playing A waveform synchronized with sound signals is output
    M37-28 (TWL-) - M37-3 (GND) Sound signal (Front left) Audio system playing A waveform synchronized with sound signals is output
    M37-29 (TWR-) - M37-3 (GND) Sound signal (Front right) Audio system playing A waveform synchronized with sound signals is output
    M37-30 (FR-) - M37-3 (GND) Sound signal (Front right) Audio system playing A waveform synchronized with sound signals is output
    M38-1 (MUTE) - M37-3 (GND) Mute signal Ignition switch ACC
    Audio system playing    		 2 V or higher
    Audio system changing modes Below 1 V
    M38-2 (L-) - M37-3 (GND) Sound signal (Left) Audio system playing A waveform synchronized with sound signals is output
    M38-3 (L+) - M37-3 (GND) Sound signal (Left) Audio system playing A waveform synchronized with sound signals is output
    M38-4 (R-) - M37-3 (GND) Sound signal (Right) Audio system playing A waveform synchronized with sound signals is output
    M38-5 (R+) - M37-3 (GND) Sound signal (Right) Audio system playing A waveform synchronized with sound signals is output
    M38-6 (SLD) - Body ground Shield ground Always Below 1 V
    M38-7 (TX-) AVC-LAN communication signal - -
    M38-8 (TX+) AVC-LAN communication signal - -
    M38-11 (SPD) - M37-3 (GND) Vehicle speed signal Ignition switch ON
    Wheel being rotated    		 Pulse generation
    M38-12 (ACC) - M37-3 (GND) Power source (ACC) Ignition switch off Below 1 V
    Ignition switch ACC 11 to 14 V
    M38-14 (II1-) - M37-3 (GND) Voice signal Voice guidance sounding A waveform synchronized with voice signals is output
    M38-15 (II1+) - M37-3 (GND) Voice signal Voice guidance sounding A waveform synchronized with voice signals is output
    M38-18 (SLD1) - Body ground Shield ground Always Below 1 V
  3. DCM (TELEMATICS TRANSCEIVER) (w/ Telematics Transceiver) 

    Refer to TERMINALS OF ECU [12/2019 - 10/2022]

  4. COMBINATION METER ASSEMBLY 

    Refer to TERMINALS OF ECU [12/2019 - 11/2023]

  5. NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) (for HV Model) 

    Refer to TERMINALS OF ECU [12/2019 - ]

  6. SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) (for Gasoline Model) 

    Refer to TERMINALS OF ECU [12/2019 - ]

  7. REAR TELEVISION CAMERA ASSEMBLY (w/ Rear View Monitor System) 

    Refer to TERMINALS OF ECU [12/2019 - 10/2022]

  8. REAR TELEVISION CAMERA ASSEMBLY (w/ Parking Assist Monitor System) 

    Refer to TERMINALS OF ECU [12/2019 - 10/2022]

  9. TELEVISION DISPLAY ASSEMBLY (w/ Rear Seat Entertainment System) 

    Refer to TERMINALS OF ECU [12/2019 - 10/2022]

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