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Terminals Of Ecu

  1. CHECK OUTER MIRROR CONTROL ECU 
    Fig 1: Identifying I17 ECU Connector Terminals
    G05636826Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the I17 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I17-9 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      I17-3 (B) - I17-9 (GND) R - W-B Battery (ECU power source) Always 11 to 14 V
      I17-4 (ACC) - I17-9 (GND) GR - W-B ACC power supply Engine switch off Below 1 V
      Engine switch on (ACC) 11 to 14 V

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

    3. Reconnect the I17 ECU connector.
    4. Measure the voltage of the connector.
      VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I17-1 (RL) - I17-9 (GND) LG - W-B Mirror retract motor output (retracting) Mirror retract switch on (Outer rear view mirror LH retracting) 10.3 to 14 V
      I17-2 (FL) - I17-9 (GND) SB - W-B Mirror retract motor output (returning) Mirror retract switch off (Outer rear view mirror LH returning) 10.3 to 14 V
      I17-5 (RR) - I17-9 (GND) BR - W-B Mirror retract motor output (retracting) Mirror retract switch on (Outer rear view mirror RH retracting) 10.3 to 14 V
      I17-6 (FR) - I17-9 (GND) R - W-B Mirror retract motor output (returning) Mirror retract switch off (Outer rear view mirror RH returning) 10.3 to 14 V
      I18-18 (M+L) - I17-9 (GND) Y - W-B Mirror motor output Mirror master switch L,
      Mirror control switch off      		 Below 1 V
      Mirror master switch L,
      Mirror control switch up or left      		 Below 1 V
      Mirror master switch L,
      Mirror control switch down or right      		 10 to 14 V
      I18-19 (MHL) - I17-9 (GND) G - W-B Mirror motor output Mirror master switch L,
      Mirror control switch off      		 Below 1 V
      Mirror master switch L,
      Mirror control switch right      		 Below 1 V
      Mirror master switch L,
      Mirror control switch left      		 10 to 14 V
      I18-20 (MVL) - I17-9 (GND) L-W-B Mirror motor output Mirror master switch L,
      Mirror control switch off      		 Below 1 V
      Mirror master switch L,
      Mirror control switch down      		 Below 1 V
      Mirror master switch L,
      Mirror control switch up      		 10 to 14 V
      I18-38 (M+R) - I17-9 (GND) Y - W-B Mirror motor output Mirror master switch R,
      Mirror control switch off      		 Below 1 V
      Mirror master switch R,
      Mirror control switch up or left      		 Below 1 V
      Mirror master switch R,
      Mirror control switch down or right      		 10 to 14 V
      I18-39 (MHR) - I17-9 (GND) G - W-B Mirror motor output Mirror master switch R,
      Mirror control switch off      		 Below 1 V
      Mirror master switch R,
      Mirror control switch right      		 Below 1 V
      Mirror master switch R,
      Mirror control switch left      		 10 to 14 V
      I18-40 (MVR) - I17-9 (GND) R - W-B Mirror motor output Mirror master switch R,
      Mirror control switch off      		 Below 1 V
      Mirror master switch R,
      Mirror control switch down      		 Below 1 V
      Mirror master switch R,
      Mirror control switch up      		 10 to 14 V
      I18-4 (VSR) - I18-3 (LE1) GR-BR Vertical direction position signal Mirror master switch R or L
      Mirror control switch up or down      		 Voltage fluctuates between 0 and 5 V
      I18-5 (HSRL) - I18-3 (LE1) L-BR Horizontal direction position signal Mirror master switch R or L
      Mirror control switch right or left      		 Voltage fluctuates between 0 and 5 V
      I18-2 (LVC) - I18-3 (LE1) B-BR Power source for mirror position sensor Engine switch off during sleep mode Below 1 V
      Engine switch on (IG) 4.7 to 5.5 V
      I18-24 (VSRR) - I18-23 (RE1) GR-BR Vertical direction position signal Mirror master switch R or L
      Mirror control switch up or down      		 Voltage fluctuates between 0 and 5 V
      I18-25 (HSRR) - I18-23 (RE1) W-BR Horizontal direction position signal Mirror master switch R or L
      Mirror control switch right or left      		 Voltage fluctuates between 0 and 5 V
      I18-22 (RVC) - I18-23 (RE1) B-BR Power source for mirror position sensor Engine switch off during sleep mode Below 1 V
      Engine switch on (IG) 4.7 to 5.5 V

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

  2. CHECK MAIN BODY ECU 
    Fig 2: Identifying 2B, 2A And 2D ECU Connector Terminals
    G05636827Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the 2B, 2A and 2D ECU connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      VOLTAGE AND RESISTANCE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      2B-20 (BATB) - Body ground L - Body ground BATB power supply Always 11 to 14 V
      2A-1 (ACC) - Body ground B - Body ground ACC power supply Always 11 to 14 V
      2A-1 (IG) - Body ground B - Body ground IG power supply Always 11 to 14 V
      2D-62 (GND2) - Body ground W-B - Body ground Body ground Always Below 1 Ω

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

    3. Reconnect the 2B, 2A and 2D ECU connectors.
    4. Measure the voltage of the connectors.
      VOLTAGE SPECIFICATION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      E2-6 (RET) - 2D-62 (GND2) BR - W-B Mirror retract motor output (retracting) Mirror retract switch on 11 to 14 V
      E2-6 (RET) - 2D-62 (GND2) BR - W-B Mirror retract motor output (returning) Mirror retract switch off Below 1 V
      E1-12 (MIRS) - E1-2 (MIRE) LG-BR Mirror motor output Mirror master switch L 11 to 14 V
      Mirror master switch R 11 to 14 V
      Mirror master switch off Below 1 V
      E1-11 (MIRB) - E1-2 (MIRE) GR-BR Mirror motor output Mirror master switch L,
      Mirror control switch right      		 11 to 14 V
      Mirror master switch L,
      Mirror control switch left      		 11 to 14 V
      Mirror master switch L,
      Mirror control switch down      		 11 to 14 V
      Mirror master switch L,
      Mirror control switch up      		 11 to 14 V
      Mirror master switch R,
      Mirror control switch right      		 11 to 14 V
      Mirror master switch R,
      Mirror control switch left      		 11 to 14 V
      Mirror master switch R,
      Mirror control switch down      		 11 to 14 V
      Mirror master switch R,
      Mirror control switch up      		 11 to 14 V
      Mirror master switch off Below 1 V

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

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