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Terminals Of Ecu

  1. CHECK GATEWAY ECU 
    Fig 1: Identifying Gateway ECU
    G02977427Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E23 ECU connector.
    2. Measure the voltage and resistance between the specified terminals on the wire harness side connector.

      Standard: 

      GATEWAY ECU

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (E23-24) - Body ground W-B - Body ground Ground Always Below 1 Ω
      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
      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 
    Fig 2: Identifying Rain Sensor
    G02977428Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the O3 ECU connector.
    2. Measure the voltage and resistance between the specified terminals on the wire harness side connector.

      Standard: 

      O3 ECU CONNECTOR

      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
      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 
    Fig 3: Identifying Body ECU Connector (1 Of 2)
    G02977429Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Identifying Body ECU Connector (2 Of 2)
    G02977430Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the 1I, 1A, 1F, 1M, 1R and D6 ECU connectors.
    2. Measure the voltage and resistance between the specified terminals on the wire harness side connector.

      Standard: 

      1I, 1A, 1F, 1M, 1R AND D6 ECU CONNECTORS

      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
      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
      (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.

  4. CHECK A/C ECU 
    Fig 5: Identifying A/C ECU Connector
    G02977431Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D37 ECU connector.
    2. Measure the voltage and resistance between the specified terminals on the wire harness side connector.

      Standard: 

      D37 ECU CONNECTOR

      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
      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 
    Fig 6: Identifying Power Source Control ECU
    G02977432Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D44 ECU connector.
    2. Measure the voltage and resistance between the specified terminals on the wire harness side connector.

      Standard: 

      D44 ECU CONNECTOR

      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
      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

      (*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.

  6. CHECK CERTIFICATION ECU 
    Fig 7: Identifying Certification ECU
    G02977433Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D39 ECU connector.
    2. Measure the voltage and resistance between the specified terminals on the wire harness side connector.

      Standard: 

      SYMBOLS CONDITION AND SPECIFIED CONDITION 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
      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 
    Fig 8: Identifying Combination Switch ECU
    G02977434Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D13 ECU connector.
    2. Measure the voltage and resistance between the specified terminals on the wire harness side connector.

      Standard: 

      D13 ECU connector

      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
      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 
    Fig 9: Identifying Power Seat ECU
    G02977435Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the Q14 and Q15 ECU connectors.
    2. Measure the voltage and resistance between the specified terminals on the wire harness side connector.

      Standard: 

      Q14 AND Q15 ECU CONNECTORS

      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
      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) 
    Fig 10: Identifying Memory Mirror ECU (LH)
    G02977436Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the I1 ECU connector.
    2. Measure the voltage and resistance between the specified terminals on the wire harness side connector.

      Standard: 

      I1 ECU CONNECTOR

      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
      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) 
    Fig 11: Identifying Memory Mirror ECU (RH)
    G02977437Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the H1 ECU connector.
    2. Measure the voltage and resistance between the specified terminals on the wire harness side connector.

      Standard: 

      H1 ECU CONNECTOR

      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
      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 
    Fig 12: Identifying Front Controller
    G02977438Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the 1E, 1H and 1G ECU connectors.
    2. Measure the voltage and resistance between the specified terminals on the wire harness side connector.

      Standard: 

      1E, 1H AND 1G ECU CONNECTORS

      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
      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 
    Fig 13: Identifying Combination Meter ECU
    G02977439Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E2 ECU connector.
    2. Measure the resistance and voltage between the specified terminals on the wire harness side connector.

      Standard: 

      E2 ECU CONNECTOR

      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
      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 (*2) 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 
    Fig 14: Identifying Option Connector
    G02977440Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D16 ECU connector.
    2. Measure the resistance between the specified terminals on the wire harness side connector.

      Standard: 

      D16 ECU CONNECTOR

      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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