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Terminals Of Ecu

  1. CHECK FRONT MULTIPLEX NETWORK DOOR ECU LH 
    Fig 1: Identifying Multiplex Network Door ECU LH Connector
    G04023117Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N3, N4 and j1 ECU connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      SYMBOLS WIRING COLOR CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (N3-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      CPUB (N3-4) - GND (N3- 1) LG - W-B Battery (ECU power source) Always 10 to 14 V
      SIG (N3-3) - GND (N3-1) Y - W-B Ignition power supply Engine switch off Below 1 V
      SIG (N3-3) - GND (N3-1) Y - W-B Ignition power supply Engine switch on (IG) 10 to 14 V
      BDR (N3-6) - GND (N3-1) L - W-B Battery (ECU power source) Always 10 to 14 V
      - (j1-12) - + (j1-4) B-R - BR-W Mirror heater output and ground 25°C (75°F) 3.6 to 4.8 Ω
      SEL1 (N4-11) - SELE (N4- 12) P - P Terminal for identification of driver side Always Below 1 Ω

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

    3. Reconnect the N3, N4 and j1 ECU connectors.
    4. Measure the voltage of the connectors.
      SYMBOLS WIRING COLOR CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      MR (j1-3) - GND (N3-1) G - W-B Mirror retract motor output (retracting) Mirror retract switch ON (Outer rear view mirror LH is retracting) 10 to 14 V
      MF (j1-11) - GND (N3-1) L - W-B Mirror retract motor output (returning) Mirror retract switch OFF (Outer rear view mirror LH is returning) 10 to 14 V
      M+ (j1-10) - GND (N3-1) B - W-B Mirror motor output Mirror master switch LEFT, Mirror control switch OFF Below 1 V
      M+ (j1-10) - GND (N3-1) B - W-B Mirror motor output Mirror master switch LEFT, Mirror control switch UP or LEFT Below 1 V
      M+ (j1-10) - GND (N3-1) B - W-B Mirror motor output Mirror master switch LEFT, Mirror control switch DOWN or RIGHT 10 to 14 V
      MH (j1-9) - GND (N3-1) R - W-B Mirror motor output Mirror master switch LEFT, Mirror control switch OFF Below 1 V
      MH (j1-9) - GND (N3-1) R - W-B Mirror motor output Mirror master switch LEFT, Mirror control switch RIGHT Below 1 V
      MH (j1-9) - GND (N3-1) R - W-B Mirror motor output Mirror master switch LEFT, Mirror control switch LEFT 10 to 14 V
      MV (j1-1) - GND (N3-1) W - W-B Mirror motor output Mirror master switch LEFT, Mirror control switch OFF Below 1 V
      MV (j1-1) - GND (N3-1) W - W-B Mirror motor output Mirror master switch LEFT, Mirror control switch DOWN Below 1 V
      MV (j1-1) - GND (N3-1) W - W-B Mirror motor output Mirror master switch LEFT, Mirror control switch UP 10 to 14 V
      + (j1-4) - GND (N3-1) BR-W - W-B Mirror heater output Rear defogger switch ON 10 to 14 V
      + (j1-4) - GND (N3-1) BR-W - W-B Mirror heater output Rear defogger switch OFF Below 1 V
      VSSL (j1-6) - E1 (j1-14) V - GR Vertical direction position signal Mirror master switch RIGHT or LEFT Mirror control switch UP or DOWN Voltage fluctuates between 0 and 5 V
      HSSL (j1-13) - E1 (j1-14) LG - GR Horizontal direction position signal Mirror master switch RIGHT or LEFT Mirror control switch RIGHT or LEFT Voltage fluctuates between 0 and 5 V
      VC (j1-5) - E1 (j1-14) SB - GR Power source for mirror position sensor Engine switch off during sleep mode Below 1 V
      VC (j1-5) - E1 (j1-14) SB - GR Power source for mirror position sensor Engine switch on (IG) 3.5 to 5.5 V
      ECI+ (N3-18) - ECI- (N3- 19) BR - O EC mirror signal Electrochromic mirror system is operating 1.05 to 1.35 V
      ECI+ (N3-18) - ECI- (N3- 19) BR - O EC mirror signal Electrochromic mirror system is not operating Below 1 V
      EC+ (j1-7) - EC- (j1-15) BR - B-L EC mirror signal Electrochromic mirror system is operating 1.05 to 1.35 V
      EC+ (j1-7) - EC- (j1-15) BR - B-L EC mirror signal Electrochromic mirror system is not operating Below 1 V
      SEL1 (N4-11) - GND (N3- 1) P - W-B Terminal for identification of driver side Always Below 1 V

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

  2. CHECK FRONT MULTIPLEX NETWORK DOOR ECU RH 
    Fig 2: Front Multiplex Network Door ECU RH Terminal Connector
    G04023118Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the M4 and i1 ECU connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      SYMBOLS WIRING COLOR CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (M4-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      CPUB (M4-4) - GND (M4- 1) LG - W-B Battery (ECU power source) Always 10 to 14 V
      SIG (M4-3) - GND (M4-1) L - W-B Ignition power supply Engine switch off Below 1 V
      SIG (M4-3) - GND (M4-1) L - W-B Ignition power supply Engine switch on (IG) 10 to 14 V
      BDR (M4-6) - GND (M4-1) L - W-B Battery (ECU power source) Always 10 to 14 V
      - (i1-12) - + (i1-4) B-R - BR-W Mirror heater output and ground 25°C (75°F) 3.6 to 4.8 Ω

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

    3. Reconnect the M4 and i1 ECU connectors.
    4. Measure the voltage of the connectors.
      SYMBOLS WIRING COLOR CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      MR (i1-3) - GND (M4-1) G - W-B Mirror retract motor output (retracting) Mirror retract switch ON (Outer rear view mirror RH is retracting) 10 to 14 V
      MF (i1-11) - GND (M4-1) L - W-B Mirror retract motor output (returning) Mirror retract switch OFF (Outer rear view mirror RH is returning) 10 to 14 V
      M+ (i1-10) - GND (M4-1) B - W-B Mirror motor output Mirror master switch RIGHT, Mirror control switch OFF Below 1 V
      M+ (i1-10) - GND (M4-1) B - W-B Mirror motor output Mirror master switch RIGHT, Mirror control switch UP or LEFT Below 1 V
      M+ (i1-10) - GND (M4-1) B - W-B Mirror motor output Mirror master switch RIGHT, Mirror control switch DOWN or RIGHT 10 to 14 V
      MH (i1-9) - GND (M4-1) R - W-B Mirror motor output Mirror master switch RIGHT, Mirror control switch OFF Below 1 V
      MH (i1-9) - GND (M4-1) R - W-B Mirror motor output Mirror master switch RIGHT, Mirror control switch RIGHT Below 1 V
      MH (i1-9) - GND (M4-1) R - W-B Mirror motor output Mirror master switch RIGHT, Mirror control switch LEFT 10 to 14 V
      MV (i1-1) - GND (M4-1) W - W-B Mirror motor output Mirror master switch RIGHT, Mirror control switch OFF Below 1 V
      MV (i1-1) - GND (M4-1) W - W-B Mirror motor output Mirror master switch RIGHT, Mirror control switch DOWN Below 1 V
      MV (i1-1) - GND (M4-1) W - W-B Mirror motor output Mirror master switch RIGHT, Mirror control switch UP 10 to 14 V
      + (i1-4) - GND (M4-1) BR-W - W-B Mirror heater output Rear defogger switch ON 10 to 14 V
      + (i1-4) - GND (M4-1) BR-W - W-B Mirror heater output Rear defogger switch OFF Below 1 V
      VSSR (i1-6) - E1 (i1-14) V - GR Vertical direction position signal Mirror master switch RIGHT or LEFT
      Mirror control switch UP or DOWN      		 Voltage fluctuates between 0 and 5 V
      HSSR (i1-13) - E1 (i1-14) LG - GR Horizontal direction position signal Mirror master switch RIGHT or LEFT
      Mirror control switch RIGHT or LEFT      		 Voltage fluctuates between 0 and 5 V
      VC (i1-5) - E1 (i1-14) SB - GR Power source for mirror position sensor Engine switch on (ACC) or off during sleep mode Below 1 V
      VC (i1-5) - E1 (i1-14) SB - GR Power source for mirror position sensor Engine switch on (IG) 3.5 to 5.5 V
      ECI+ (M4-18) - ECI- (M4- 19) BR - O EC mirror signal Electrochromic mirror system is operating 1.05 to 1.35 V
      ECI+ (M4-18) - ECI- (M4- 19) BR - O EC mirror signal Electrochromic mirror system is not operating Below 1 V
      EC+ (i1-7) - EC- (i1-15) BR - B-L EC mirror signal Electrochromic mirror system is operating 1.05 to 1.35 V
      EC+ (i1-7) - EC- (i1-15) BR - B-L EC mirror signal Electrochromic mirror system is not operating Below 1 V

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

  3. INSPECT MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY 
    Fig 3: Multiplex Network Master Switch Assembly Terminal Connector
    G04023119Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R5 master switch connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      SYMBOLS WIRING COLOR CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      E (R5-2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      BDR1 (R5-10) - E (R5-2) Y - W-B Power window power source Always 10 to 14 V
      CPUB (R5-9) - E (R5-2) G - W-B Power source for CPU and relevant device Always 10 to 14 V
      SIG (R5-20) - E (R5-2) V - W-B Power source for CPU and relevant device Engine switch off Below 1 V
      SIG (R5-20) - E (R5-2) V - W-B Power source for CPU and relevant device Engine switch on (IG) 10 to 14 V

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

    3. Reconnect the R5 master switch connector.
    4. Measure the voltage of the connector.
      SYMBOLS WIRING COLOR CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      MM (R5-3) - E (R5-2) SB - W-B SET switch signal SET switch OFF 10 to 14 V
      MM (R5-3) - E (R5-2) SB - W-B SET switch signal SET switch ON Below 1 V
      M1 (R5-13) - E (R5-2) L - W-B M1 switch signal M1 switch OFF 10 to 14 V
      M1 (R5-13) - E (R5-2) L - W-B M1 switch signal M1 switch ON Below 1 V
      M2 (R5-17) - E (R5-2) V - W-B M2 switch signal M2 switch OFF 10 to 14 V
      M2 (R5-17) - E (R5-2) V - W-B M2 switch signal M2 switch ON Below 1 V
      M3 (R5-18) - E (R5-2) R - W-B M3 switch signal M3 switch OFF 10 to 14 V
      M3 (R5-18) - E (R5-2) R - W-B M3 switch signal M3 switch ON Below 1 V

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

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