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Terminals Of Ecu

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) 
    Fig 1: Main Body ECU Connector Terminals (Driver Side Junction Block)
    G04950357Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the DA, L11, L12 and L13 ECU connectors
    2. Measure the resistance and voltage according to the value(s) in the table below
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    DA-40 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
    DA-40 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
    L12-1 (AM2) - DA-40 (GND2) W - W-B Battery power supply Always 11 to 14 V
    L13-6 (AM1) - DA-40 (GND2) W - W-B Battery power supply Always 11 to 14 V

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

  2. CHECK MASTER SWITCH ASSEMBLY 
    Fig 2: Identifying Master Switch Assembly N13 Connector Terminals
    G04952077Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N13 master switch assembly connector
    2. Measure the resistance and voltage according to the value(s) in the table below.
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No (Symbols) Wiring Color Terminal Description Condition Specified Condition
    N13-11 (B) - N13-12 (GND) B - R Battery power supply Always 11 to 14 V
    N13-12 (GND) - Body ground R - 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 POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Side) 
    Fig 3: Identifying N11 Motor Connector Terminal
    G04952073Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N11 motor connector
    2. Measure the resistance and voltage according to the value(s) in the table below.
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No (Symbols) Wiring Color Terminal Description Condition Specified Condition
    N11-2 (B) - N11-1 (E) O - B Battery power supply Always 11 to 14 V
    N11-1 (E) - Body ground 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 POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Side) 
    Fig 4: Identifying N3 Motor Connector Terminal
    G04952074Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N3 motor connector
    2. Measure the resistance and voltage according to the value(s) in the table below
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    N3-2 (B) - N3-1 (E) O - B Battery power supply Always 11 to 14 V
    N3-1 (E) - Body ground 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 REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH 
    Fig 5: Identifying 019 Motor Connector Terminal
    G04952075Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the 019 motor connector
    2. Measure the resistance and voltage according to the value(s) in the table below
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    O19-2 (B) - O19-1 (E) O - B Battery power supply Always 11 to 14 V
    O19-1 (E) - Body ground 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 REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH 
    Fig 6: Identifying 08 Motor Connector Terminal
    G04952076Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the 08 motor connector.
    2. Measure the resistance and voltage according to the value(s) in the table below
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    O8-2 (B) - O8-1 (E) O - B Battery power supply Always 11 to 14 V
    O8-1 (E) - Body ground 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 SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU) 
    Fig 7: Identifying Sliding Roof ECU X5 Connector Terminals
    G04946943Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the X5 ECU connector
    2. Measure the resistance and voltage according to the value(s) in the table below
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No (Symbols) Wiring Color Terminal Description Condition Specified Condition
    X5-1 (B) - X5-2 (E) B - W-B Battery power supply Always 11 to 14V
    X5-2 (E) - 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 CERTIFICATION ECU 
    Fig 8: Identifying Certification ECU L15 & L16 Connector Terminals
    G04951342Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L15 ECU connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No (Symbols) Wiring Color Terminal Description Condition Specified Condition
    L15-1 (+B1) - L15-17(E) L - W-B Battery power supply Always 11 to 14 V
    L15-17 (E) - 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 ID CODE BOX 
    Fig 9: Identifying ID Code Box ECU L32 Connector Terminals
    G04946945Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L32 ECU connector.
    2. Measure the resistance and voltage according to the value(s) in the table below
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    L32-1 (+B) - L32-8 (GND) L - W-B Battery power supply Always 11 to 14 V
    L32-8 (GND) - 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 STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU) 
    Fig 10: Identifying Steering Lock ECU L33 Connector Terminals
    G05787037Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L33 ECU connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    L33-7 (B) - L33-1 (GND) P - W-B Battery power supply Always 11 to 14 V
    L33-1 (GND) - 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 NETWORK FRONT LIGHT ECU (FRONT CONTROLLER) 
    Fig 11: Identifying Front Controller ECU A50 Connector Terminals
    G04951346Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A50 ECU connector
    2. Measure the resistance and voltage according to the value(s) in the table below.
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    A50-1 (FMB3) - A50-2 (E) LG - W-B Battery power supply Always 11 to 14 V
    A50-5 (FMIG) - A50-2 (E) Y - W-B IG power supply Power switch OFF Below 1 V
    A50-5 (FMIG) - A50-2 (E) Y - W-B IG power supply Power switch ON (IG) 11 to 14 V
    A50-2 (E) - 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 
    Fig 12: Identifying Rain Sensor X8 Connector Terminals
    G04945021Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the X8 sensor connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    X8-4 (SIG) - X8-1 (ES) LG - BR IG power supply Power switch OFF Below 1 V
    X8-4 (SIG) - X8-1 (ES) LG - BR IG power supply Power switch ON (IG) 11 to 14 V
    X8-1 (ES) - Body ground BR - Body ground Ground Always Below 1 Ω

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

  13. CHECK LUGGAGE ROOM JUNCTION BLOCK ASSEMBLY (REAR JUNCTION BLOCK ECU) 
    Fig 13: Identifying Luggage Room (Rear Junction Block ECU) Connector Terminals
    G04950358Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the LA and LD ECU connectors.
    2. Measure the voltage and resistance according to the value(s) in the table below.
    VOLTAGE SPECIFICATION

    Terminal No (Symbols) Wiring Color Terminal Description Condition Specified Condition
    LD-4 (MPXB) - LA-29 (SG) R - W-B Battery power supply Always 11 to 14 V
    LA-29 (SG) - 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

  14. CHECK MAP LIGHT ASSEMBLY (OVERHEAD JUNCTION BLOCK) 
    Fig 14: Identifying X4 And X6 ECU Connector Terminals
    G04946950Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the X4 and X6 ECU connectors.
    2. Measure the voltage and resistance according to the value(s) in the table below.
    VOLTAGE SPECIFICATION

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    X4-6 (+B) - X4-16 (GND9) B - B Battery power supply Always 11 to 14 V
    X4-16 (GND9) - Body ground 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 OUTER MIRROR SWITCH 
    Fig 15: Identifying Outer Mirror Switch L6 Connector Terminals
    G04946951Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L6 switch connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No (Symbols) Wiring Color Terminal Description Condition Specified Condition
    L6-1 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
    L6-11 (IG) - L6-1 (E) G - W-B IG power supply Power switch OFF Below 1 V
    L6-11 (IG) - L6-1 (E) G - W-B IG power supply Power switch ON (IG) 11 to 14 V
    L6-12 (B) - L6-1 (E) B - W-B Battery power supply Always 11 to 14 V

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

  16. CHECK NO. 1 CONSOLE SWITCH 
    Fig 16: Identifying L75 Switch Connector Terminal
    G04946952Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L75 switch connector
    2. Measure the resistance and voltage according to the value(s) in the table below
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    L75-1 (B) - L75-5 (E) B - W-B Battery power supply Always 11 to 14 V
    L75-5 (E) - 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 FRONT SEAT CLIMATE CONTROL ECU LH 
    Fig 17: Identifying LH Front Seat Climate Control ECU E34 Connector Terminals
    G04946953Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the e34 ECU connector
    2. Measure the resistance and voltage according to the value(s) in the table below.
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    e34-1 (IG) - e34-12 (GND) P - W-B IG power supply Power switch OFF Below 1 V
    e34-1 (IG) - e34-12 (GND) P - W-B IG power supply Power switch ON (IG) 11 to 14 V
    e34-2 (SYSB) - e34-12 (GND) R - W-B Battery power supply Always 11 to 14 V
    e34-12 (GND) - 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 FRONT SEAT CLIMATE CONTROL ECU RH 
    Fig 18: Identifying E4 ECU Connector Terminal
    G04946954Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the e4 ECU connector.
    2. Measure the resistance and voltage according to the value(s) in the table below
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No (Symbols) Wiring Color Terminal Description Condition Specified Condition
    e4-1 (IG) - e4-12 (GND) Y - W-B IG power supply Power switch OFF Below 1 V
    e4-1 (IG) - e4-12 (GND) Y - W-B IG power supply Power switch ON (IG) 11 to 14 V
    e4-2 (SYSB) - e4-12 (GND) W - W-B Battery power supply Always 11 to 14 V
    e4-11 (VER) - Body ground W-B - Body ground Ground Always Below 1 Ω
    e4-12 (GND) - 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.

  19. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (A/C ECU) 
    Fig 19: Identifying A/C ECU L76 Connector Terminals
    G04950350Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L76 ECU connector
    2. Measure the resistance and voltage according to the value(s) in the table below.
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No (Symbols) Wiring Color Terminal Description Condition Specified Condition
    L76-5 (IG+) - L76-1 (GND) V - W-B IG power supply Power switch OFF Below 1 V
    L76-5 (IG+) - L76-1 (GND) V - W-B IG power supply Power switch ON (IG) 11 to 14 V
    L76-6 (+B1) - L76-1 (GND) L - W-B Battery power supply Always 11 to 14 V
    L76-7 (+B2) - L76-1 (GND) L - W-B Battery power supply Always 11 to 14 V
    L76-1 (GND) - 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.

  20. CHECK REAR POWER SEAT MODULE SWITCH (w/o Ottoman) 
    Fig 20: Identifying Rear Power Seat Module Switch Connector Z54 & Z56
    G05774229Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the z54 switch connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    z54-11 (B) - z54-3 (E) R - W Battery power supply Always 11 to 14V
    z54-3 (E) - 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

  21. CHECK REAR POWER SEAT MODULE SWITCH (w/ Ottoman) 
    Fig 21: Identifying Rear Power Seat Module Switch S15 Connector Terminals
    G04950364Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S15 switch connector
    2. Measure the resistance and voltage according to the value(s) in the table below
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No (Symbols) Wiring Color Terminal Description Condition Specified Condition
    S15-6 (B) - S15-5(E) R - W-B Battery power supply Always 11 to 14 V
    S15-5 (E) - 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.

  22. CHECK POSITION CONTROL ECU RH 
    Fig 22: Identifying RH Position Control ECU F5 Connector Terminals
    G04952512Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the f5 ECU connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    f5-6 (SYSB) - f5-12 (SGND) R - BR Battery power supply Always 11 to 14 V
    f5-1 (SEL) - f5-11 (SEL2) B - B Right or left identification Always Below 1 Ω
    f5-12 (SGND) - Body ground BR - Body ground Ground Always Below 1 Ω

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

  23. CHECK POSITION CONTROL ECU LH 
    Fig 23: Identifying LH Position Control ECU F25 Connector Terminals
    G04952511Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the f25 ECU connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    f25-6 (SYSB) - f25-12 (SGND) R-BR Battery power supply Always 11 to 14 V
    f25-12 (SGND) -Body ground BR - Body ground Ground Always Below 1 Ω

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

  24. CHECK REAR SEAT CLIMATE CONTROL ECU RH 
    Fig 24: Identifying RH Rear Seat Climate Control F7/F8 Connector Terminals
    G04952607Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the F8 ECU connector.
    2. Measure the resistance and voltage according to the value(s) in the table below
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    f8-1 (IG) - f8-12 (GND) Y - W-B IG power supply Power switch OFF Below 1 V
    f8-1 (IG) - f8-12 (GND) Y - W-B IG power supply Power switch ON (IG) 11 to 14 V
    f8-2 (SYSB) - f8-12 (GND) G - W-B Battery power supply Always 11 to 14 V
    f8-11 (VER) - Body ground W-B - Body ground Ground Always Below 1 Ω
    f8-12 (GND) - 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.

  25. CHECK REAR SEAT CLIMATE CONTROL ECU LH 
    Fig 25: Identifying Rear Seat Climate Control ECU Connector Terminals
    G05787052Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the f13*1 or f28*2 ECU connector
    2. Measure the resistance and voltage according to the value(s) in the table below.

    w/o Climate Control Seat System: 

    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    f13-1 (IG) - f13-12 (GND) Y - W-B IG power supply Power switch OFF Below 1 V
    f13-1 (IG) - f13-12 (GND) Y - W-B IG power supply Power switch ON (IG) 11 to 14 V
    f13-2 (SYSB) - f13-12 (GND) G - W-B Battery power supply Always 11 to 14 V
    f13-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    w/ Climate Control Seat System: 

    VOLTAGE SPECIFICATION

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    f28-1 (IG) - f28-12 (GND) P - W-B IG power supply Power switch OFF Below 1 V
    f28-1 (IG) - f28-12 (GND) P - W-B IG power supply Power switch ON (IG) 11 to 14 V
    f28-2 (SYSB) - f28-12 (GND) V - W-B Battery power supply Always 11 to 14 V
    f28-12 (GND) - 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

  26. CHECK SEAT VIBRATOR MODULE ASSEMBLY 
    Fig 26: Identifying Seat Vibration Module Assembly S29 Connector Terminals
    G04952698Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S29 module connector
    2. Measure the resistance and voltage according to the value(s) in the table below.
    VOLTAGE AND RESISTANCE REFERENCE

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    S29-1 (IG) - S29-8 (GND) BR - W-B IG power supply Power switch OFF Below 1 V
    S29-1 (IG) - S29-8 (GND) BR - W-B IG power supply Power switch ON (IG) 11 to 14 V
    S29-8 (GND) - 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.

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