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Terminals Of Ecu

  1. INSPECT INSTRUMENT PANEL J/B ASSEMBLY (MULTIPLEX NETWORK BODY ECU) 
    Fig 1: Identifying ECU Connector Terminals
    G04093852Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the B5 ECU, 1D, 1E, 1F, 1M and 1R J/B connectors.
    2. Check the voltage and resistance between each terminal of the wire harness side connectors.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    BECU (1D-10) - Body ground L-B - Body ground +B (ECUB) power supply Constant 10 to 14 V
    BECU (1F-1) - Body ground SB - Body ground +B (ECUB) power supply Constant 10 to 14 V
    MPX1 (1E-7) - Body ground BR - Body ground MPX line Constant 10 kΩ or higher
    MPX1 (1R-9) - Body ground LG - Body ground MPX line Constant 10 kΩ or higher
    MPX2 (B5-21) - Body ground GR - Body ground MPX line Constant 10 kΩ or higher
    GND1 (1F-10) - Body ground W-B - Body ground Ground Constant Below 1 Ω
    GND2 (1M-9) - Body ground W-B - Body ground Ground Constant Below 1 Ω

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

  2. CHECK INTEGRATION SWITCH (w/o LEXUS NAVIGATION SYSTEM) 
    Fig 2: Identifying C4 Switch Connector Terminals
    G04093853Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the C4 switch connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    +B (C4-1) - GND (C4-7) O - W-B +B (+B) power supply Constant 10 to 14 V
    MPX+ (C4-5) - Body ground L - Body ground MPX line Constant 10 kΩ or higher
    MPX- (C4-12) - Body ground GR - Body ground MPX line Constant 10 kΩ or higher
    GND (C4-7) - Body ground W-B - Body ground Ground Constant Below 1 Ω

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

  3. CHECK NETWORK GATEWAY ECU (w/ LEXUS NAVIGATION SYSTEM) 
    Fig 3: Identifying G3 ECU Connector
    G04093854Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the G3 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    BATT (G3-8) - GND (G3-14) O - W-B +B (BATT) power supply Constant 10 to 14 V
    MPD1 (G3-4) - Body ground L - Body ground MPX line Constant 10 kΩ or higher
    MPD2 (G3-11) - Body ground GR - Body ground MPX line Constant 10 kΩ or higher
    CG (G3-7) - Body ground W-B - Body ground Ground Constant Below 1 Ω

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

  4. CHECK ECM 
    Fig 4: Identifying E5, E6 And E7 ECM Connectors
    G04093855Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E5, E6 and E7 ECM connectors.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    BATT (E5-3) - E1 (E7-1) B - BR +B (BATT) power supply Constant 10 to 14 V
    IGSW (E5-9) - E1 (E7-1) G - BR Ignition Switch Ignition Switch OFF --> ON 0 V --> 10 to 14 V
    +B (E5-1) - E1 (E7-1) L-B - BR +B (+B) power supply Ignition Switch OFF --> ON 0 V --> 10 to 14 V
    +B2 (E5-2) - E1 (E7-1) L-B - BR +B (+B2) power supply Ignition Switch OFF --> ON 0 V --> 10 to 14 V
    MPX1 (E6-18) - Body ground R - Body ground MPX line Constant 10 kΩ or higher
    MPX2 (E6-29) - Body ground O - Body ground MPX line Constant 10 kΩ or higher
    E1 (E7-1) - Body ground BR - Body ground Ground Constant Below 1 Ω
    ME01 (E7-4) - Body ground W-B - Body ground Ground Constant Below 1 Ω

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

  5. CHECK TRANSPONDER KEY ECU ASSEMBLY 
    Fig 5: Identifying T9 ECU Connector
    G04093856Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T9 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

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

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

  6. CHECK MULTIPLEX TILT & TELESCOPIC ECU 
    Fig 6: Identifying T4 ECU Connector
    G04093857Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T4 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    +B (T4-2) - GND (T4-11) Y - W-B +B (+B) power supply Constant 10 to 14 V
    ECUB (T4-9) - GND (T4-11) SB - W-B +B (ECUB) power supply Constant 10 to 14 V
    MPX1 (T4-5) - Body ground GR - Body ground MPX line Constant 10 kΩ or higher
    MPX2 (T4-14) - Body ground O - Body ground MPX line Constant 10 kΩ or higher
    GND (T4-11) - Body ground W-B - Body ground Ground Constant Below 1 Ω

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

  7. CHECK A/C AMPLIFIER (A/C ECU) 
    Fig 7: Identifying A7 And A8 Amplifier Connector
    G04093858Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A8 amplifier connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    +B (A8-2) - GND (A8-6) SB - W-B +B (+B) power supply Constant 10 to 14 V
    MPX+ (A8-3) - Body ground BR - Body ground MPX line Constant 10 kΩ or higher
    MPX- (A8-4) - Body ground GR - Body ground MPX line Constant 10 kΩ or higher
    GND (A8-6) - Body ground W-B - Body ground Ground Constant 10 kΩ or higher

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

  8. CHECK OUTER MIRROR CONTROL ECU ASSEMBLY (PASSENGER SIDE) 
    Fig 8: Identifying R27 ECU Connector
    G04093859Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R27 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    CPUB (R27-7) - GND (R27-1) L-B - W-B +B (CPUB) power supply Constant 10 to 14 V
    BDR (R27-3) - GND (R22-1) G - W-B +B (BDR) power supply Constant 10 to 14 V
    MPX1 (R27-6) - Body ground L - Body ground MPX line Constant 10 kΩ or higher
    GND (R27-1) - Body ground W-B - Body ground Ground Constant Below 1 Ω

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

  9. CHECK OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER SIDE) 
    Fig 9: Identifying R26 ECU Connector
    G04093860Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R26 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    CPUB (R26-7) - GND (R21-1) L-B - W-B +B (CPUB) power supply Constant 10 to 14 V
    BDR (R26-3) - GND (R21-1) G - W-B +B (BDR) power supply Constant 10 to 14 V
    MPX1 (R26-6) - Body ground R - Body ground MPX line Constant 10 kΩ or higher
    GND (R26-1) - Body ground W-B - Body ground Ground Constant Below 1 Ω

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

  10. CHECK WINDSHIELD WIPER RELAY ASSEMBLY (WIPER ECU) 
    Fig 10: Identifying A28 Relay Connector
    G04093861Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A28 relay connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    +B (A28-8) - E (A28-12) SB - W-B +B (+B) power supply Constant 10 to 14 V
    MPX1 (A28-1) - Body ground BR - Body ground MPX line Constant 10 kΩ or higher
    E (A28-12) - Body ground W-B - Body ground Ground Constant Below 1 Ω

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

  11. CHECK POSITION CONTROL ECU & SWITCH (POWER SEAT ECU) 
    Fig 11: Identifying P32 And P33 ECU Connectors
    G04093862Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P32 and P33 ECU connectors.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    +B (P33-5) - GND (P33-1) LG - W-B +B (+B) power supply Constant 10 to 14 V
    SYSB (P32-8) - GND (P33-1) GR - W-B +B (SYSB) power supply Constant 10 to 14 V
    IG (P32-4) - GND (P33-1) Y - W-B Ignition switch Ignition Switch OFF --> ON 0 V --> 10 to 14 V
    MPX1 (P32-1) - Body ground W - Body ground MPX line Constant 10 kΩ or higher
    GND (P33-1) - Body ground W-B - Body ground Ground Constant Below 1 Ω

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

  12. CHECK MULTIPLEX NETWORK DOOR ECU BACK (BACK DOOR ECU) 
    Fig 12: Identifying P13 And P14 ECU Connectors
    G04093863Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P13 and P14 ECU connectors.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    B (P14-2) - GND (P14-8) Y - W-B +B (+B) power supply Constant 10 to 14 V
    ECUB (P13-10) - GND (P14-8) BR - W-B +B (ECUB) power supply Constant 10 to 14 V
    IG (P13-9) - GND (P14-8) GR - W-B Ignition switch Ignition Switch OFF --> ON 0 V --> 10 to 14 V
    MPX1 (P13-22) - Body ground SB - Body ground MPX line Constant 10 kΩ or higher
    GND (P14-8) - Body ground W-B - Body ground Ground Constant Below 1 Ω

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

  13. CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY 
    Fig 13: Identifying P22 Switch Connector
    G04093864Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P22 switch connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

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

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

  14. CHECK COMBINATION METER ASSEMBLY 
    Fig 14: Identifying C8 And C9 Meter Connectors
    G04093865Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the C8 and C9 meter connectors.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

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

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

  15. CHECK AIRBAG SENSOR ASSEMBLY (AIRBAG ECU) 
    Fig 15: Identifying A20 Sensor Connector
    G04093866Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A20 sensor connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    IG2 (A20-5) - E1 (A20-27) B - W-B Ignition Switch Ignition Switch OFF --> ON 0 V --> 10 to 14 V
    MPX1 (A20-24) - Body ground BR - Body ground MPX line Constant 10 kΩ or higher
    MPX2 (A20-22) - Body ground) BR - Body ground MPX line Constant 10 kΩ or higher
    E1 (A20-27) - Body ground W-B - Body ground Ground Constant Below 1 Ω
    E2 (A20-28) - Body ground W-B - Body ground Ground Constant Below 1 Ω

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

  16. CHECK SLIDING ROOF DRIVE GEAR ASSEMBLY (SLIDING ROOF ECU (STANDARD TYPE)) 
    Fig 16: Identifying M12 Gear Connector
    G04093867Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the M12 gear connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    B (M12-1) - E (M12-7) P - W-B +B (B) power supply Constant 10 to 14 V
    ECUB (M12-5) - E(M12-7) SB - W-B +B (ECUB) power supply Constant 10 to 14 V
    MPX1 (M12-10) - Body ground R - Body ground MPX line Constant 10 kΩ or higher
    E (M12-7) - Body ground W-B - Body ground Ground Constant Below 1 Ω

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

  17. CHECK SLIDING ROOF DRIVE GEAR ASSEMBLY (SLIDING ROOF ECU (MULTI-PANEL MOON ROOF TYPE)) 
    Fig 17: Identifying M12 ECU Connector
    G04093868Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the M12 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    B (M12-4) - E (M12-8) P - W-B +B (B) power supply Constant 10 to 14 V
    ECUB (M12-10) - E(M12-8) SB - W-B +B (ECUB) power supply Constant 10 to 14 V
    MPX1 (M12-5) - Body ground R - Body ground MPX line Constant 10 kΩ or higher
    E (M12-8) - Body ground W-B - Body ground Ground Constant Below 1 Ω

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

  18. CHECK RAIN SENSOR 
    Fig 18: Identifying R7 Sensor Connector
    G04093869Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R7 sensor connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    SIG (R7-1) - ES (R7-3) P - W-B +B (SIG) power supply Constant 10 to 14 V
    MPX1 (R7-2) - Body ground V - Body ground MPX line Constant 10 kΩ or higher
    ES (R7-3) - Body ground W-B - Body ground Ground Constant Below 1 Ω

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

  19. CHECK HEADLIGHT SWIVEL ECU (AFS ECU) 
    Fig 19: Identifying A14 ECU Connector
    G04093870Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A14 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

    Standard 

    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    IGS (A14-12) - E1 (A14-1) P - W-B Ignition switch Ignition Switch OFF --> ON 0 V --> 10 to 14 V
    >IG (A14-2) - E1 (A14-1) P - W-B Ignition switch Ignition Switch OFF --> ON 0 V --> 10 to 14 V
    MPX1 (A14-5) - Body ground W - Body ground MPX line Constant 10 kΩ or higher
    E1S (A14-11) - Body ground W-B - Body ground Ground Constant Below 1 Ω

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

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