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Terminals Of Ecu

  1. CHECK OUTER MIRROR CONTROL ECU ASSY 
    1. Disconnect the R10 mirror ECU connector.
    2. Check the voltage or continuity of each terminal of the wire harness side connector.
      Fig 1: Identifying Terminals Of ECU
      G02965699Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      OUTER MIRROR CONTROL ECU ASSY (1 OF 4)

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      GND (R10-14) <=> Body ground W-B <=> - Constant Continuity
      +B (R10-1) <=> Body ground W-R <=>- Constant 10 - 14 V
      ACC (R10-2) <=> Body ground GR <=>- Ignition switch OFF -> ACC 0 V <=> 10- 14 V
      REV (R10-15) <=> Body ground R-B <=>- Ignition switch OFF -> ACC 0V <=> 10 - 14 V

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

    1. Reconnect the R10 mirror ECU connector, and check the voltage of terminal of the connector.

      Standard: 

      OUTER MIRROR CONTROL ECU ASSY (2 OF 4)

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      M+L (R10-10) <=> GND (R10-14) Y-B <=> W-B Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF -> RIGHT or DOWN 0 - 8 V or more
      MHL (R10-11) <=> GND (R10-14) P-B <=> W-B Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF -> LEFT 0 - 8 V or more
      MVL (R10-12) <=> GND (R10-14) P-G <=> W-B Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF -> UP 0 - 8 V or more
      M+R (R10-22) <=> GND (R10-14) Y-B <=> W-B Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF -> RIGHT or DOWN 0 - 8 V or more
      MHR (R10-23) <=> GND (R10-14) LG-B <=>W-B Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF -> LEFT 0 - 8 V or more
      MVR (R10-24) <=>GND (R10-14) LG-R <=>W-B Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch OFF -> UP 0 - 8 V or more

      If the result is not as specified, the ECU may be malfunctioning.

      Standard: 

      OUTER MIRROR CONTROL ECU ASSY (3 OF 4)

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      VSRL (R10-8) <=> Body ground B-L <=>- Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch innermost position <=> outermost position Approx. 4 V ->0.23 V
      HSRL (R10-9) <=> Body ground B-R <=>- Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch uppermost position <=> lowermost position Approx. 3.7 V ->0.27 V
      VSSR (R10-20) <=> Body ground B-L <=>- Ignition switch ACC, Left/Right adjustment switch L side, Mirror switch innermost position <=> outermost position Approx. 4 V ->0.23 V
      HSRR (R10-21) <=> Body ground B-R <=>- Ignition switch ACC, Left/Right adjustment switch R side, Mirror switch uppermost position <=> lowermost position Approx. 3.7 V ->0.27 V
      MHR (R10-23) <=> Body ground LG-B <=>- Ignition switch OFF, All lights OFF. All doors closed and left untouched for 30 sec. or more <=> Any door open No Hz output (0 HZ) <=> Hz output
      MVR (R10-24) <=> Body ground LG-R <=>- Ignition switch OFF. All lights OFF All doors closed and left untouched for 30 sec. or more <=> Any door open No Hz output (0 HZ) <=> Hz output

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

      Standard: 

      OUTER MIRROR CONTROL ECU ASSY (4 OF 4)

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      VC (R10-7) <=> Body ground B-Y <=>- Ignition switch OFF -> ACC 0 V ->5 V

      If the result is not as specified, the ECU may be malfunctioning.

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