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Terminals Of Ecu

  1. CHECK GATEWAY ECU 
    1. Disconnect the E23 ECU connector.
      Fig 1: Identifying E23 ECU Connector Terminals
      G05007066Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      BATT (E23-10) - Body ground B - Body ground Power supply (Back-up) Always 10 to 14 V
      IG (E23-1) - Body ground W - Body ground Power supply (IG) Ignition switch: OFF → ON (IG) Below 1 V → 10 to 14 V
      ACC (E23-2) - Body ground R - Body ground Power supply (ACC) Ignition switch: OFF → ON (ACC) Below 1 V → 10 to 14 V

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

    3. Measure the resistance between the specified terminals on the wire harness side connector.

      Resistance: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (E23-24) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPD1 (E23-3) - Body ground G - Body ground MPX line Always 10 kΩ or higher
      MPD2 (E23-12) - Body ground P - Body ground MPX line Always 10 kΩ or higher

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

  2. CHECK RAIN SENSOR 
    1. Disconnect the O3 ECU connector.
      Fig 2: Identifying O3 ECU Connector Terminals
      G05007067Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      SIG (O3-1) - Body ground V - Body ground Power supply (IG) Ignition switch: OFF → ON (IG) Below 1 V → 10 to 14 V

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

    3. Measure the resistance between the specified terminals on the wire harness side connector.

      Resistance: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      ES (O3-3) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPX (O3-2) - Body ground L - Body ground MPX line Always 10 kΩ or higher

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

  3. CHECK BODY ECU 
    1. Disconnect the 1I, 1A, 1F, 1M, 1R and D6 ECU connectors.
      Fig 3: Identifying 1I, 1A, 1F, 1M, 1R And D6 ECU Connectors Terminals
      G05007068Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (1I-9) - Body ground LG - Body ground ((1))
      G - Body ground ((2))      		 Power supply (IG) Ignition switch:
      off → on (IG)      		 Below 1 V → 10 to 14 V
      ACC (1I-3) - Body ground R - Body ground ((1))
      O - Body ground ((2))      		 Power supply (ACC) Ignition switch:
      off → on (ACC)      		 Below 1 V → 10 to 14 V
      BATB (1A-1) - Body ground B - Body ground Power supply (Back-up) Always 10 to 14 V
      (1) w/ Smart Key System
      (2) w/o Smart Key System

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

    3. Measure the resistance between the specified terminals on the wire harness side connector.

      Resistance: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND1 (1F-10) - Body ground W-B - Body ground Ground Always Below 1 Ω
      GND2 (1M-9) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPX1 (1R-9) - Body ground B - Body ground MPX line Always 10 kΩ or higher
      MPX2 (D6-21) - Body ground BR - Body ground MPX line Always 10 kΩ or higher

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

  4. CHECK A/C ECU 
    1. Disconnect the D37 ECU connector.
      Fig 4: Identifying D37 ECU Connector Terminals
      G05007069Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG+ (D37-21) - Body ground G - Body ground Power supply (IG) Ignition switch:
      off → on (IG)      		 Below 1 V → 10 to 14 V
      B (D37-1) - Body ground SB - Body ground Power supply (Back-up) Always 10 to 14 V

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

    3. Measure the resistance between the specified terminals on the wire harness side connector.

      Resistance: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (D37-20) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPX+ (D37-30) - Body ground LG - Body ground ((1))
      B - Body ground ((2))      		 MPX line Always 10 kΩ or higher
      MPX- (D37-31) - Body ground L - Body ground MPX line Always 10 kΩ or higher
      (1) w/ Smart Key System
      (2) w/o Smart Key System

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

  5. CHECK POWER SOURCE CONTROL ECU 
    1. Disconnect the D44 ECU connector.
      Fig 5: Identifying D44 ECU Connector Terminals
      G05007070Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      ACCD (D44-11) - Body ground R - Body ground Power supply (ACC) Ignition switch:
      off → on (ACC)      		 Below 1 V → 10 to 14 V
      AM1 (D44-33) - Body ground W - Body ground Power supply (Back-up) Always 10 to 14 V
      AM2 (D44-12) - Body ground L - Body ground Power supply (Back-up) Always 10 to 14 V

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

    3. Measure the resistance between the specified terminals on the wire harness side connector.

      Resistance: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND2 (D44-6) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPX1 (D44-7) - Body ground B - Body ground MPX line Always 10 kΩ or higher
      MPX2 (D44-24) - Body ground LG - Body ground MPX line Always 10 kΩ or higher

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

  6. CHECK CERTIFICATION ECU 
    1. Disconnect the D39 ECU connectors.
      Fig 6: Identifying D39 ECU Connector Terminals
      G05007071Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (D39-18) - Body ground Y - Body ground Power supply (IG) Ignition switch:
      off → on (IG)      		 Below 1 V → 10 to 14 V
      ACC (D39-19) - Body ground SB - Body ground Power supply (ACC) Ignition switch:
      off → on (ACC)      		 Below 1 V → 10 to 14 V
      +B1 (D39-1) - Body ground R - Body ground Power supply (Back-up) Always 10 to 14 V

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

    3. Measure the resistance between the specified terminals on the wire harness side connector.

      Resistance: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      E (D39-17) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPX1 (D39-27) - Body ground R - Body ground MPX line Always 10 kΩ or higher
      MPX2 (D39-28) - Body ground B - Body ground MPX line Always 10 kΩ or higher

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

  7. CHECK COMBINATION SWITCH ECU 
    1. Disconnect the D13 ECU connector.
      Fig 7: Identifying D13 ECU Connector Terminals
      G05007072Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (D13-2) - Body ground L - Body ground Power supply (IG) Ignition switch:
      off → on (IG)      		 Below 1 V → 10 to 14 V
      B (D13-1) - Body ground W - Body ground Power supply (Back-up) Always 10 to 14 V

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

    3. Measure the resistance between the specified terminals on the wire harness side connector.

      Resistance: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      E (D13-5) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPX1 (D13-6) - Body ground BR - Body ground MPX line Always 10 kΩ or higher
      MPX2 (D13-7) - Body ground R - Body ground ((1))
      B - Body ground ((2))      		 MPX line Always 10 kΩ or higher
      (1) w/ Smart Key System
      (2) w/o Smart Key System

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

  8. CHECK POWER SEAT ECU 
    1. Disconnect the Q14 and Q15 ECU connectors.
      Fig 8: Identifying Q14 And Q15 ECU Connectors Terminals
      G05007073Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (Q14-4) - Body ground Y - Body ground Power supply (IG) Ignition switch:
      off → on (IG)      		 Below 1 V → 10 to 14 V
      +B (Q15-5) - Body ground LG - Body ground Power supply (Back-up) Always 10 to 14 V

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

    3. Measure the resistance between the specified terminals on the wire harness side connector.

      Resistance: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (Q15-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPX1 (Q14-1) - Body ground O - Body ground MPX line Always 10 kΩ or higher

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

  9. CHECK MEMORY MIRROR ECU (LH) 
    1. Disconnect the I1 ECU connector.
      Fig 9: Identifying I1 ECU Connector Terminals
      G05007074Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      SIG (I1-3) - Body ground GR - Body ground Power supply (IG) Ignition switch:
      off → on (IG)      		 Below 1 V → 10 to 14 V
      CPUB (I1-4) - Body ground W - Body ground Power supply (Back-up) Always 10 to 14 V
      BDR (I1-6) - Body ground W - Body ground Power supply (Back-up) Always 10 to 14 V

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

    3. Measure the resistance between the specified terminals on the wire harness side connector.

      Resistance: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (I1-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPX1 (I1-8) - Body ground BR - Body ground MPX line Always 10 kΩ or higher

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

  10. CHECK MEMORY MIRROR ECU (RH) 
    1. Disconnect the H1 ECU connector.
      Fig 10: Identifying H1 ECU Connector Terminals
      G05007075Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      SIG (H1-3) - Body ground GR - Body ground Power supply (IG) Ignition switch:
      off → on (IG)      		 Below 1 V → 10 to 14 V
      CPUB (H1-4) - Body ground W - Body ground Power supply (Back-up) Always 10 to 14 V
      BDR (H1-6) - Body ground V - Body ground Power supply (Back-up) Always 10 to 14 V

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

    3. Measure the resistance between the specified terminals on the wire harness side connector.

      Resistance: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (H1-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPX1 (H1-8) - Body ground B - Body ground MPX line Always 10 kΩ or higher

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

  11. CHECK FRONT CONTROLLER 
    1. Disconnect the 1E, 1H and 1G ECU connectors.
      Fig 11: Identifying 1E, 1H And 1G ECU Connectors Terminals
      G05007076Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      1E-2 - Body ground Y - Body ground Power supply (IG) Ignition switch:
      off → on (IG)      		 Below 1 V → 10 to 14 V
      1H-4 - Body ground LG - Body ground Power supply (Back-up) Always 10 to 14 V

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

    3. Measure the resistance between the specified terminals on the wire harness side connector.

      Resistance: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      1G-7 - Body ground Y - Body ground MPX line Always 10 kΩ or higher
      1G-8 - Body ground B - Body ground MPX line Always 10 kΩ or higher

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

  12. CHECK COMBINATION METER ECU 
    1. Disconnect the E2 ECU connectors.
      Fig 12: Disconnecting E2 ECU Connectors Terminals
      G05007077Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      E2-13 - Body ground R - Body ground Power supply (IG) Ignition switch: off → on (IG) Below 1 V → 10 to 14 V
      E2-2 - Body ground B - Body ground Power supply (Back-up) Always 10 to 14 V

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

    3. Measure the resistance between the specified terminals on the wire harness side connector.

      Resistance: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      E2-10 - Body ground W-B - Body ground Ground Always Below 1 Ω
      E2-4 - Body ground P - Body ground MPX line Always 10 kΩ or higher
      E2-16 - Body ground LG - Body ground MPX line Always 10 kΩ or higher

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

  13. CHECK OPTION CONNECTOR 
    1. Disconnect the D16 ECU connector.
      Fig 13: Identifying D16 ECU Connector Terminals
      G05007078Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance between the specified terminals on the wire harness side connector.

      Resistance: 

      TERMINALS REFERENCE

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      D16-1 (MPX+) - Body ground W - Body ground MPX line Always 10 kΩ or higher

      If the values do not conform to the conditions specified, there may be a malfunction on the wire harness side.

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