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Terminals Of Ecu

  1. CHECK OUTER MIRROR CONTROL ECU ASSY LH 
    Fig 1: Identifying Terminals Of ECU (Outer Mirror Control ECU Assy LH)
    G03009720Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R21 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

      Standard: 

      R21 ECU CONNECTOR TERMINALS VOLTAGE AND RESISTANCE SPECIFICATIONS

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (R21-1) - Body ground W-B - Body ground Ground Constant Below 1 Ω
      CPUB (R21-7) - Body ground L-B - Body ground Battery (ECU power source) Constant 10 to 14 V
      SIG (R21-8) - Body ground GR - Body ground Ignition power supply Ignition switch OFF --> ON 0 V --> 10 to 14 V
      BDR (R21-3) - Body ground G - Body ground Battery (Drive motor power supply for mirror face adjustment) Constant 10 to 14 V

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

    3. Reconnect the R21 ECU connector.
    4. Check the voltage of each terminal of the R23 ECU connector.

      Standard: 

      R23 ECU CONNECTOR TERMINALS VOLTAGE SPECIFICATIONS

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      LM+R (R23-10) - Body ground R - Body ground Outer mirror switch signal/(Right or Down) Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF --> RIGHT or DOWN 10 to 14 V
      LMHR (R23-9) - Body ground BR - Body ground Outer mirror switch signal/(Left or Down) Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF --> LEFT or DOWN 10 to 14 V
      LMVR (R23-1) - Body ground V - Body ground Outer mirror switch signal/(Up or Right) Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF --> UP or Right 10 to 14 V
      VSSR (R23-6) - Body ground Y-B - Body ground Vertical direction position signal Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch uppermost position --> lowermost position 3 to 1 V
      HSSR (R23-13) - Body ground P - Body ground Horizontal direction position signal Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch innermost position --> outermost position 1 to 3 V
      LVC (R23-5) - Body ground R-W - Body ground Power source for mirror position sensor Ignition switch OFF --> ACC 0 to 5 V
      HTR+ (R23-4) - HTR- (R23-12) B - B Mirror heater signal Mirror heater switch ON 10 to 14 V

      If the result is not as specified, replace the mirror assy or the ECU may be malfunctioning.

  2. CHECK OUTER MIRROR CONTROL ECU ASSY RH 
    Fig 2: Identifying ECU Connector Terminals (Outer Mirror Control ECU Assy RH)
    G03009721Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R22 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

      Standard: 

      R22 ECU CONNECTOR TERMINALS VOLTAGE AND RESISTANCE SPECIFICATIONS

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (R22-1) - Body ground W-B - Body ground Ground Constant Below 1 Ω
      CPUB (R22-7) - Body ground L-B - Body ground Battery (ECU power source) Constant 10 to 14 V
      SIG (R22-8) - Body ground GR - Body ground Ignition power supply Ignition switch OFF --> ON 0 V --> 10 to 14 V
      BDR (R22-3) - Body ground G - Body ground Battery (Drive motor power supply for mirror face adjustment) Constant 10 to 14 V

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

    3. Reconnect the R22 ECU connector.
    4. Check the voltage of each terminal of the R24 ECU connector.

      Standard: 

      R24 ECU CONNECTOR TERMINALS VOLTAGE SPECIFICATIONS

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      RM+R (R24-10) - Body ground R - Body ground Outer mirror switch signal/(Right or Down) Ignition switch ACC, Left/Right adjustment switch R side, Mirror switch OFF --> RIGHT or DOWN 10 to 14 V
      RMHR (R24-9) - Body ground BR - Body ground Outer mirror switch signal/(Left or Down) Ignition switch ACC, Left/Right adjustment switch R side, Mirror switch OFF --> LEFT or DOWN 10 to 14 V
      RMVR (R24-1) - Body ground V - Body ground Outer mirror switch signal/(Up or Right) Ignition switch ACC, Left/Right adjustment switch R side, Mirror switch OFF --> UP or Right 10 to 14 V
      VSSR (R24-6) - Body ground Y-B - Body ground Vertical direction position signal Ignition switch ACC, Left/Right adjustment switch R side, Mirror switch uppermost position --> lowermost position 3 to 1 V
      HSSR (R24-13) - Body ground P - Body ground Horizontal direction position signal Ignition switch ACC, Left/Right adjustment switch R side, Mirror switch innermost position --> outermost position 1 to 3 V
      RVC (R24-5) - Body ground R-W - Body ground Power source for mirror position sensor Ignition switch OFF --> ACC 0 to 5 V
      HTR+ (R24-4) - HTR- (R24-12) B - B Mirror heater signal Mirror heater switch ON 10 to 14 V

      If the result is not as specified, replace the mirror assy or the ECU may be malfunctioning.

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