LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2007 >> RX 400h AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 318 (Audio System & Visual System) >> Audio And Visual 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 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK RADIO RECEIVER ASSEMBLY (for Premium Sound Models) 
    Fig 1: Identifying ECU Terminals
    G05586244Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E62 and E76 receiver connectors.
    2. Measure the resistance and voltage of the wire harness side connector.
      RESISTANCE AND VOLTAGE SPECIFICATION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (E62-20) - Body ground BR - Body ground Ground Always Below 1 Ω
      B (E62-1) - GND (E62-20) L - BR Battery Always 10 to 14 V
      ACC (E62-11) - GND (E62-20) GR - BR ACC power supply Ignition switch OFF Blow 1 V
      ACC (E62-11) - GND (E62-20) GR - BR ACC power supply Ignition switch ACC 10 to 14 V
      +B (E76-5) - GND (F62-20) R - BR Battery Always 10 to 14 V
      GND (E76-14) - Body ground BR - Body ground Ground Always Below 1 V
      ACC (E76-16) - GND (F62-20) GR - BR Accessory (ON) Ignition switch off → ACC Below 1 V → 10 to 14 V

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

    3. Reconnect the E62 and E76 receiver connectors.
    4. Measure the voltage of the connectors.
      VOLTAGE SPECIFICATION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      ATX+ (E62-5) - GND (E62-20) R - BR AVC-LAN communication signal Ignition switch ACC 2 to 3 V
      ATX- (E62-15) - GND (E62-20) G-BR AVC-LAN communication signal Ignition switch ACC 2 to 3 V
      MUTE (E62-7) - GND (E62-20) P - BR Mute signal Audio system is playing → changing mode Above 3.5 V → Below 1 V
      L+ (E62-9) - GND (E62-20) R - BR Sound signal (left) Audio system is operating Waveform synchronized with sound is output
      L- (E62-19) - GND (E62-20) G - BR Sound signal (left) Audio system is operating Waveform synchronized with sound is output
      R- (E62-18) - GND (E62-20) W - BR Sound signal (right) Audio system is operating Waveform synchronized with sound is output
      R+ (E62-8) - GND (E62-20) B - BR Sound signal (right) Audio system is operating Waveform synchronized with sound is output
      SLD (E62-10) - GND (E62-20) Shielded - BR Shielded Always Below 1 V
      ALI (E49-17) - GND (E62-20) B - BR Sound signal (left) External device is playing (when stereo jack is used) Waveform synchronized with sound is output
      ARI (E49-15) - GND (E62-20) W - BR Sound signal (right) External device is playing (when stereo jack is used) Waveform synchronized with sound is output
      ASGN (E49-16) - Body ground Shielded - Body ground Shielded Always Below 1 V
      AUXI (E49-19) - GND (E62-20) R - BR External input connection detection signal External device is connected Below 1 V
      ILL+ (E62-2) - GND (E62-20) G - BR Illumination signal Light control switch TAIL or HEAD 10 to 14 V
      ILL- (E62-12) - GND (E62-20) BR - BR Illumination signal Light control switch TAIL or HEAD Pulse generation
      SW1 (E49-7)* - GND (E62-20) W - BR Steering pad switch signal Steering pad switch not pushed 4 V or more
      SW1 (E49-7)* - GND (E62-20) W - BR Steering pad switch signal Steering pad switch SEEK+ switch pushed Approx. 0.5 V
      SW1 (E49-7)* - GND (E62-20) W - BR Steering pad switch signal Steering pad switch SEEK- switch pushed Approx. 0.9 V
      SW1 (E49-7)* - GND (E62-20) W - BR Steering pad switch signal Steering pad switch VOL+ switch pushed Approx. 2.0 V
      SW1 (E49-7)* - GND (E62-20) W - BR Steering pad switch signal Steering pad switch VOL-switch pushed Approx. 3.4 V
      SW2 (E49-8)* - GND (E62-20) R - BR Steering pad switch signal Steering pad switch not pushed 4 V or more
      SW2 (E49-8)* - GND (E62-20) R - BR Steering pad switch signal Steering pad switch MODE switch pushed Below 0.5 V
      SW2 (E49-8)* - GND (E62-20) R - BR Steering pad switch signal Steering pad switch ON HOOK switch pushed Approx. 0.9 V
      SW2 (E49-8)* - GND (E62-20) R - BR Steering pad switch signal Steering pad switch OFF HOOK switch pushed Approx. 2.0 V
      SW2 (E49-8)* - GND (E62-20) R - BR Steering pad switch signal Steering pad switch VOICE switch pushed Approx. 3.4 V
      SWG (E49-6)* - Body ground B - Body ground Steering pad switch signal ground Always Below 1 V
      MIC- (E76-1) - GND (F62-20) R - BR Microphone voice signal "Bluetooth" handsfree function is ON A waveform synchronized with sounds is output
      MIC+ (E76-2) - GND (F62-20) W - BR Microphone voice signal "Bluetooth" handsfree function is ON A waveform synchronized with sounds is output
      MCVD (E76-7) - GND (F62-20) B - BR Microphone AMP power supply Ignition switch off → ON Below 1 V → 5 V
      HINT:
      *: with Steering Pad Switch

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

  2. CHECK RADIO RECEIVER (for Standard Models) 
    Fig 2: Identifying ECU Connector Terminals (Radio Receiver)
    G05586245Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E47 receiver connector.
    2. Measure the resistance and voltage of the wire harness side connector.
      RESISTANCE AND VOLTAGE SPECIFICATION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (E47-7) - Body ground BR - Body ground Ground Always Below 1 Ω
      B (E47-4) - GND (E47-7) L - BR Battery Always 10 to 14 V
      ACC (E47-3) - GND (E47-7) GR - BR ACC power supply Ignition switch OFF Below 1 V
      ACC (E47-3) - GND (E47-7) GR - BR ACC power supply Ignition switch ACC 10 to 14 V

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

    3. Reconnect the E47 receiver connector.
    4. Measure the voltage of the connectors.
      VOLTAGE SPECIFICATION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      FL+ (E47-2) - GND (E47-7) P - BR Sounds signal (front left) Audio system is operating Waveform synchronized with sound is output
      FL- (E47-6) - GND (E47-7) V - BR Sounds signal (front left) Audio system is operating Waveform synchronized with sound is output
      FR+ (E47-1) - GND (E47-7) LG - BR Sounds signal (front right) Audio system is operating Waveform synchronized with sound is output
      FR- (E47-5) - GND (E47-7) L - BR Sounds signal (front right) Audio system is operating Waveform synchronized with sound is output
      RL+ (E48-2) - GND (E47-7) B - BR Sounds signal (rear left) Audio system is operating Waveform synchronized with sound is output
      RL- (E48-6) - GND (E47-7) Y - BR Sounds signal (rear left) Audio system is operating Waveform synchronized with sound is output
      RR+ (E48-1) - GND (E47-7) R - BR Sounds signal (rear right) Audio system is operating Waveform synchronized with sound is output
      RR- (E48-3) - GND (E47-7) W - BR Sounds signal (rear left) Audio system is operating Waveform synchronized with sound is output
      SPD (E49-3) - GND (E47-7) V - BR Speed signal Ignition switch ON
      Drive wheels are turned slowly      		 Pulse generation
      ALI (E49-17) - GND (E47-7) B - BR Sound signal (left) External device is playing (when stereo jack is used) Waveform synchronized with sound is output
      ARI (E49-15) - GND (E47-7) W - BR Sound signal (right) External device is playing (when stereo jack is used) Waveform synchronized with sound is output
      ASGN (E49-16) - Body ground Shielded - Body ground Shielded Always Below 1 V
      AUXI (E49-19) - GND (E47-7) R - BR External input connection detection signal External device is connected Below 1 V
      ILL+ (E47-10) - GND (E47-7) G - BR Illumination signal Light control switch TAIL or HEAD 10 to 14 V
      ILL- (E48-5) - GND (E47-7) BR - BR Illumination signal Light control switch TAIL or HEAD Pulse generation
      SW1 (E49-7)* - GND (E47-7) W - BR Steering pad switch signal Steering pad switch not pushed 4 V or more
      SW1 (E49-7)* - GND (E47-7) W - BR Steering pad switch signal Steering pad switch SEEK+ switch pushed Approx. 0.5 V
      SW1 (E49-7)* - GND (E47-7) W - BR Steering pad switch signal Steering pad switch SEEK- switch pushed Approx. 0.9 V
      SW1 (E49-7)* - GND (E47-7) W - BR Steering pad switch signal Steering pad switch VOL+ switch pushed Approx. 2.0 V
      SW1 (E49-7)* - GND (E47-7) W - BR Steering pad switch signal Steering pad switch VOL-switch pushed Approx. 3.4 V
      SW2 (E49-8)* - GND (E47-7) R - BR Steering pad switch signal Steering pad switch not pushed 4 V or more
      SW2 (E49-8)* - GND (E47-7) R - BR Steering pad switch signal Steering pad switch MODE switch pushed Below 0.5 V
      SWG (E49-6)* - Body ground B - Body ground Steering pad switch signal ground Always Below 1 V
      HINT:
      *: with Steering Pad Switch If the result is not as specified, the receiver may have a malfunction.
  3. CHECK STEREO COMPONENT AMPLIFIER (for Premium Sound Models) 
    Fig 3: Identifying Stereo Component Amplifier Connector Terminals
    G05586246Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L13, L14 and L15 amplifier connectors.
    2. Measure the resistance and voltage of the wire harness side connectors.
      RESISTANCE AND VOLTAGE SPECIFICATION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      B (L15-1) - Body ground L - Body ground Battery Always 10 to 14 V
      +B2 (L15-5) - Body ground L - Body ground Battery Always 10 to 14 V
      ACC (L13-12) - Body ground GR - Body ground ACC power supply Ignition switch ACC 10 to 14 V
      GND (L14-6) - Body ground W-B - Body ground Ground Always Below 1 Ω
      GND2 (L14-7) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the L13, L14 and L15 amplifier connectors.
    4. Measure the voltage of the connectors.
      VOLTAGE SPECIFICATION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      TX+ (L13-8) - GND (L14-6) R - W-B AVC-LAN communication signal Ignition ACC 2 to 3 V
      TX- (L13-7) - GND (L14-6) G - W-B AVC-LAN communication signal Ignition ACC 2 to 3 V
      MUTE (L13-1) - GND (L14-6) P - W-B Mute signal Audio system playing → changing mode Above 3.5 V → Below 1 V
      L+ (L13-3) - GND (L14-6) R - W-B Sound signal (left) Audio system is operating Waveform synchronized with sound is output
      L- (L13-2) - GND (L14-6) G - W-B Sound signal (left) Audio system is operating Waveform synchronized with sound is output
      R- (L13-4) - GND (L14-6) W - W-B Sound signal (right) Audio system is operating Waveform synchronized with sound is output
      R+ (L13-5) - GND (L14-6) B - W-B Sound signal (right) Audio system is operating Waveform synchronized with sound is output
      SLD (L13-6) - GND (L14-6) Shielded - W-B Shielded Always Below 1 V
      FR- (L14-3) - GND (L14-6) L - W-B Sound signal (front right) Audio system is operating Waveform synchronized with sound is output
      FR+ (L14-9) - GND (L14-6) LG - W-B Sound signal (front right) Audio system is operating Waveform synchronized with sound is output
      FR- (L15-6) - GND (L14-6) L - W-B Sound signal (front right) Audio system is operating Waveform synchronized with sound is output
      FR+ (L15-2) - GND (L14-6) LG - W-B Sound signal (front right) Audio system is operating Waveform synchronized with sound is output
      FL- (L14-1) - GND (L14-6) V - W-B Sound signal (front left) Audio system is operating Waveform synchronized with sound is output
      FL+ (L14-2) - GND (L14-6) P - W-B Sound signal (front left) Audio system is operating Waveform synchronized with sound is output
      FL- (L15-7) - GND (L14-6) V - W-B Sound signal (front left) Audio system is operating Waveform synchronized with sound is output
      FL+ (L15-8) - GND (L14-6) P - W-B Sound signal (front left) Audio system is operating Waveform synchronized with sound is output
      RL+ (L15-3) - GND (L14-6) B - W-B Sound signal (rear left) Audio system is operating Waveform synchronized with sound is output
      RL- (L15-9) - GND (L14-6) Y - W-B Sound signal (rear left) Audio system is operating Waveform synchronized with sound is output
      RR+ (L15-10) - GND (L14-6) R - W-B Sound signal (rear right) Audio system is operating Waveform synchronized with sound is output
      RR- (L15-4) - GND (L14-6) W - W-B Sound signal (rear right) Audio system is operating Waveform synchronized with sound is output
      WFL+ (L14-5) - GND (L14-6) B - W-B Sound signal (woofer) Audio system is operating Waveform synchronized with sound is output
      WFL- (L14-12) - GND (L14-6) G - W-B Sound signal (woofer) Audio system is operating Waveform synchronized with sound is output
      WFR- (L14-10) - GND (L14-6) V - W-B Sound signal (woofer) Audio system is operating Waveform synchronized with sound is output
      WFR+ (L14-4) - GND (L14-6) P - W-B Sound signal (woofer) Audio system is operating Waveform synchronized with sound is output
      SPD (L13-11) - GND (L14-6) V - W-B Speed signal Ignition switch ON
      Drive wheels are turned slowly      		 Pulse generation

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

scientia non olet · About LEMON Manuals