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Terminals Of Ecu

  1. CHECK MULTIPLEX NETWORK GATEWAY ECU 
    1. Disconnect the G3 ECU connector.
      Fig 1: Identifying G3 ECU Connector Terminals
      G05205746Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the voltage and resistance of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    BATT (G3-10) - GND (G3 24) SB - W-B +B (BATT) power supply Always 10 to 14 V
    IG (G3-1) - Body ground Y - Body ground Ignition power supply Ignition switch ON 10 to 14 V
    ACC (G3-2) - Body ground L - Body ground ACC power supply Ignition switch ON 10 to 14 V
    SIL (G3-7) - Body ground GR - Body ground Bus "+" line During transmission Pulse generation
    MPI1 (G3-4) - Body ground GR - Body ground MPX line Always 10 kΩ or higher
    MPI2 (G3-13) - Body ground O - Body ground MPX line Always 10 kΩ or higher
    MPD1 (G3-3) - Body ground R - Body ground MPX line Always 10 kΩ or higher
    MPD2 (G3-12) - Body ground L (1) - Body ground
    R(2) - Body ground    		 W-B - Body ground Always 10 kΩ or higher
    GND (G3-24) - Body ground W-B - Body ground Ground Always Below 1 Ω
    GTX- (G3-21) - Body ground B - Body ground AVC-LAN line Always 10 kΩ or higher
    GTX+ (G3-6) - Body ground R - Body ground AVC-LAN line Always 10 kΩ or higher
    (1) with Tire Pressure Warning System
    (2) without Tire Pressure Warning System

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

  2. CHECK INSTRUMENT PANEL JUNCTION BLOCK (MULTIPLEX NETWORK BODY ECU) 
    1. Disconnect the 1E, 1D and 1F junction block connectors.
    2. Disconnect the B5 ECU connector.
      Fig 2: Identifying (1F, 1E, 1D And B5) Connector Terminals
      G05281835Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    3. Measure the resistance and voltage of the wire harness side connectors.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    BECU (1D-10) - Body ground W - Body ground +B (BECU) power supply Always 10 to 14 V
    MPX1 (1E-7) - Body ground BR - Body ground MPX line Always 10 kΩ or higher
    MPX2 (B5-21) - Body ground O - Body ground MPX line Always 10 kΩ or higher
    GND1 (1F-10) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  3. CHECK CENTER CLUSTER INTEGRATION PANEL (W/O LEXUS NAVIGATION SYSTEM) 
    1. Disconnect the C4 panel connector.
      Fig 3: Identifying C4 Panel Connector Terminals
      G05281836Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the voltage and resistance of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    IG+ (C4-9) - Body ground LG - Body ground Ignition switch (on) signal Ignition switch ON 10 to 14 V
    MPX+ (C4-5) - Body ground L - Body ground MPX line Always 10 kΩ or higher
    MPX- (C4-12) - Body ground R - Body ground MPX line Always 10 kΩ or higher
    GND (C4-7) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  4. CHECK AUTO WIPER ECU 
    1. Disconnect the A28 and A29 ECU connectors.
      Fig 4: Identifying A28 And A29 ECU Connectors
      G05281837Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the voltage and resistance of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    WIG (A29-10) - Body ground Y - Body ground Ignition switch (on) signal Ignition switch ON 10 to 14 V
    MPX1 (A28-1) - Body ground BR - Body ground MPX line Always 10 kΩ or higher
    E (A28-12) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  5. CHECK AFS ECU (W/ ADAPTIVE FRONT-LIGHT SYSTEM) 
    1. Disconnect the A14 ECU connector.
      Fig 5: Identifying A15 And A14 ECU Connector
      G05281838Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the voltage and the resistance of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    IG (A14-2) - Body ground P - Body ground Ignition switch (on) signal Ignition switch ON 10 to 14 V
    IGS (A14-12) - Body ground P - Body ground Ignition switch (on) signal Ignition switch ON 10 to 14 V
    MPX1 (A14-5) - Body ground P - Body ground MPX line Always 10 kΩ or higher
    E1 (A14-1) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  6. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (W/ DRIVING POSITION MEMORY) 
    1. Disconnect the P32 and P33 ECU connectors.
      Fig 6: Identifying P32 And P33 ECU Connectors
      G05281839Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the voltage and the resistance of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    +B (P33-5) - Body ground LG - Body ground +B (+B) power supply Always 10 to 14 V
    MPX1 (P32-1) - Body ground W - Body ground MPX line Always 10 kΩ or higher
    GND (P33-1) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  7. CHECK AIR CONDITIONING AMPLIFIER (A/C ECU) 
    1. Disconnect the A8 amplifier connector.
      Fig 7: Checking A7 And A8 Amplifier Connector
      G05277422Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the voltage and resistance of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    IG+ (A8-1) - Body ground Y - Body ground Ignition switch (on) signal Ignition switch ON 10 to 14 V
    MPX+ (A8-3) - Body ground BR - Body ground MPX line Always 10 kΩ or higher
    MPX- (A8-4) - Body ground GR - Body ground MPX line Always 10 kΩ or higher
    GND (A8-6) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  8. CHECK CENTER AIRBAG SENSOR ASSEMBLY 
    1. Disconnect the A20 sensor connector.
      Fig 8: Identifying A21, A22 And A20 Sensor Connector
      G05281841Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the voltage and resistance of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    IG2 (A20-5) - Body ground B - Body ground Ignition switch (on) signal Ignition switch ON 10 to 14 V
    MPX1 (A20-24) - Body ground BR - Body ground MPX line Always 10 kΩ or higher
    MPX2 (A20-22) - Body ground BR - Body ground MPX line Always 10 kΩ or higher
    E2 (A20-28) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  9. CHECK COMBINATION METER ASSEMBLY (METER ECU) 
    1. Disconnect the C8 and C9 meter connectors.
      Fig 9: Identifying C8 And C9 Meter Connectors
      G05281842Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the voltage and resistance of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    B (C8-15) - Body ground SB - Body ground +B (B) power supply Always 10 to 14 V
    B (C8-16) - Body ground O - Body ground +B (B) power supply Always 10 to 14 V
    MPX+ (C9-4) - Body ground V - Body ground MPX line Always 10 kΩ or higher
    MPX- (C8-5) - Body ground Y - Body ground MPX line Always 10 kΩ or higher
    E (C9-1) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  10. CHECK SLIDING ROOF DRIVE GEAR (SLIDING ROOF CONTROL ECU) 
    1. Disconnect the M12 driver gear connector.
      Fig 10: Identifying M12 Driver Gear Connector
      G05281843Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the voltage and the resistance of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    B (M12-1) - Body ground P - Body ground +B (B) power supply Always 10 to 14 V
    MPX1 (M12-10) - Body ground R - Body ground MPX line Always 10 kΩ or higher
    E (M12-7) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  11. CHECK MULTIPLEX TILT AND TELESCOPIC ECU (W/ DRIVING POSITION MEMORY) 
    1. Disconnect the T4 ECU connector.
      Fig 11: Identifying T4 ECU Connector Terminals
      G05281844Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the voltage and resistance of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    +B (T4-2) - Body ground Y - Body ground +B (+B) power supply Always 10 to 14 V
    MPX1 (T4-5) - Body ground GR - Body ground MPX line Always 10 kΩ or higher
    MPX2 (T4-14) - Body ground O - Body ground MPX line Always 10 kΩ or higher
    GND (T4-11) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  12. CHECK RAIN SENSOR 
    1. Disconnect the R7 sensor connector.
      Fig 12: Identifying R7 Sensor Connector
      G05281845Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the voltage and resistance of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    SIG (R7-1) - Body ground P (1) - Body ground
    B (2) - Body ground    		 Ignition switch (on) signal Ignition switch ON 10 to 14 V
    MPX (R7-2) - Body ground V - Body ground MPX line Always 10 kΩ or higher
    ES (R7-3) - Body ground W-B - Body ground Ground Always Below 1 Ω
    (1) with Sliding Roof
    (2) without Sliding Roof

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

  13. CHECK MULTIPLEX NETWORK MASTER SWITCH 
    1. Disconnect the P22 switch connector.
      2. Fig 13: Identifying P22 Switch Connector Terminals
      G05281846Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the voltage and resistance of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    CPUB (P22-9) - Body ground L-B - Body ground +B (CPUB) power supply Always 10 to 14 V
    GND (P22-2) - Body ground W-B - Body ground Ground Always Below 1 Ω
    MPX1 (P22-7) - Body ground R - Body ground MPX line Always 10kΩ or higher
    MPX2 (P22-8) - Body ground GR - Body ground MPX line Always 10 kΩ or higher

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

  14. CHECK MULTIPLEX BACK DOOR ECU 
    1. Disconnect the P13 and P14 ECU connectors.
      Fig 14: Identifying P13 And P14 ECU Connector Terminals
      G05281847Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the voltage and resistance of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    B (P14-2) - Body ground Y - Body ground +B (B) power supply Always 10 to 14 V
    MPX1 (P13-22) - Body ground W - Body ground MPX line Always 10 kΩ or higher
    GND (P14-8) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  15. CHECK TRANSPONDER KEY ECU 
    1. Disconnect the T9 ECU connector.
      Fig 15: Identifying T9 ECU Connector
      G05281848Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the resistance and voltage of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    CPUB (T9-1) - Body ground V - Body ground B (CPUB) power supply Always 10 to 14 V
    MPX1 (T9-4) - Body ground O - Body ground MPX line Always 10 kΩ or higher
    MPX2 (T9-5) - Body ground R - Body ground MPX line Always 10 kΩ or higher
    GND (T9-14 ) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  16. CHECK OUTER MIRROR CONTROL ECU LH 
    1. Disconnect the R27 ECU connector.
      Fig 16: Identifying R27 And R29 ECU Connector
      G05281156Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the resistance and voltage of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    CPUB (R27-7) - Body ground L-B - Body ground B (CPUB) power supply Always 10 to 14 V
    MPX1 (R27-6) - GND (R27-1) R-W-B MPX line Always 10 kΩ or higher
    GND (R27-1 ) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  17. CHECK OUTER MIRROR CONTROL ECU RH 
    1. Disconnect the R28 ECU connector.
      Fig 17: Identifying R27 And R30 ECU Connector
      G05281157Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the resistance and voltage of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    CPUB (R28-7) - Body ground L-B - Body ground B (CPUB) power supply Always 10 to 14 V
    MPX1 (R28-6) - GND (R28-1) L-W-B MPX line Always 10 kΩ or higher
    GND (R28-1 ) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  18. CHECK TIRE PRESSURE WARNING ECU 
    1. Disconnect the T23 ECU connector.
      Fig 18: Identifying T23 ECU Connector Terminals
      G05281851Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Measure the resistance and voltage of the wire harness side connector.
    TERMINALS VOLTAGE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    IG (T23-1) - GND (T23-7) Y-W-B Ignition switch (on) signal Ignition switch ON 10 to 14 V
    MPX1 (T23-6) - GND (T23-7) R-W-B MPX line Always 10 kΩ or higher
    GND (T23-7) - Body ground W-B - Body ground Ground Always Below 1 Ω
    MPX2 (T23-12) - GND (T23-7) L-W-B MPX line Always 10 kΩ or higher

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

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