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Ecu Connector Terminal Identification

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

      Voltage: 

      VOLTAGE SPECIFICATION

      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: 

      RESISTANCE SPECIFICATION

      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 N3 ECU connector.
      Fig 2: Identifying Rain Sensor Connector Terminals
      G05408779Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      VOLTAGE SPECIFICATION

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      SIG (N3-1) - 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: 

      RESISTANCE SPECIFICATION

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      ES (N3-3) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPX (N3-2) - 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 II, IA, IE, IF, IM, IR and D6 ECU connectors.
      Fig 3: Identifying Body ECU Connector Terminals
      G05408780Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      VOLTAGE SPECIFICATION

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (II-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 (II-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 (IA-1) - Body ground B - Body ground Power supply (Back-up) Always 10 to 14 V
      GSW (IE-8) G Airbag sensor communication signal Airbag sensor communication circuit -
      (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: 

      RESISTANCE SPECIFICATION

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GSW (IE-8) G Airbag sensor communication signal Airbag sensor communication circuit -
      GND1 (IF-10) - Body ground W-B - Body ground Ground Always Below 1 Ω
      GND2 (IM-9) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPX1 (IR-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 A/C ECU Connector Terminals
      G05007069Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      VOLTAGE SPECIFICATION

      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: 

      RESISTANCE SPECIFICATION

      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 Power Source Control ECU Connector Terminals
      G05007070Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      VOLTAGE SPECIFICATION

      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: 

      RESISTANCE SPECIFICATION

      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 Certification ECU Connector Terminals
      G05007071Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      VOLTAGE SPECIFICATION

      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: 

      RESISTANCE SPECIFICATION

      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 Combination Switch ECU Connector Terminals
      G05007072Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      VOLTAGE SPECIFICATION

      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: 

      RESISTANCE SPECIFICATION

      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 P13 and P14 ECU connectors.
      Fig 8: Identifying Power Seat ECU Connector Terminals
      G05408785Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      VOLTAGE SPECIFICATION

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (P13-4) - Body ground Y - Body ground Power supply (IG) Ignition switch: off → on (IG) Below 1 V → 10 to 14 V
      +B (P14-5) - 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: 

      RESISTANCE SPECIFICATION

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (P14-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPX1 (P13-1) - 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 H1 ECU connector.
      Fig 9: Identifying Memory Mirror ECU Connector Terminals (LH)
      G05408786Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      VOLTAGE SPECIFICATION

      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 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: 

      RESISTANCE SPECIFICATION

      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 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 G1 ECU connector.
      Fig 10: Identifying Memory Mirror ECU Connector Terminals (RH)
      G05408787Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      VOLTAGE SPECIFICATION

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      SIG (G1-3) - Body ground GR - Body ground Power supply (IG) Ignition switch: off → on (IG) Below 1 V → 10 to 14 V
      CPUB (G1-4) - Body ground W - Body ground Power supply (Back-up) Always 10 to 14 V
      BDR (G1-6) - 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: 

      RESISTANCE SPECIFICATION

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (G1-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPX1 (G1-8) - 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 Front Controller Connector Terminals
      G05007076Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      VOLTAGE SPECIFICATION

      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: 

      RESISTANCE SPECIFICATION

      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: Identifying Combination Meter ECU Connector Terminals
      G05007077Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage between the specified terminals on the wire harness side connector.

      Voltage: 

      VOLTAGE SPECIFICATION

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

      RESISTANCE SPECIFICATION

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      ES (E2-10) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPX- (E2-4) - Body ground P - Body ground MPX line Always 10 kΩ or higher
      MPX+ (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 Option Connector Terminals
      G05007078Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance between the specified terminals on the wire harness side connector.

      Resistance: 

      RESISTANCE SPECIFICATION

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      MPX+ (D16-1) - 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.

  14. AIRBAG SENSOR ASSEMBLY 
    Fig 14: Identifying Airbag Sensor Connector Terminals
    G05408791Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION AND SPECIFIED CONDITION

    Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    GSW (D23-18) G Airbag sensor communication signal Airbag sensor communication circuit -
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