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Home >> Lexus >> 2005 >> LS 430 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Wireless Door Lock Control System (W/O Smart Key) - Diagnostics >> Wireless Door Lock Control System (W/O Smart Key System) >> Terminals Of Ecu

Terminals Of Ecu

  1. CHECK THEFT WARNING ECU ASSY 
    Fig 1: Identifying Check Theft Warning ECU Assy Terminals
    G03001396Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T5 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.

      Standard: 

      TERMINAL NUMBER SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (T5-24) - GND (T5-20) R-L - W-B Ignition power supply Ignition switch OFF --> ON 0 V --> 10 to 14 V
      ACC (T5-31) - GND (T5-20) GR - W-B Ignition power supply Ignition switch OFF --> ON 0 V --> 10 to 14 V
      +B (T5-1) - GND (T5-20) V-Y - W-B +B power supply Always 10 to 14 V
      +B2 (T5-21) - GND (T5-20) G-W - W-B +B power supply Always 10 to 14 V
      GND (T5-20) - Body ground W-B - Body ground Ground Always Below 1 Ω
      BZR3 (T5-11) - BZRG (T5-23) O - GR-R Volume adjust of wireless door lock buzzer and ON/OFF Wireless buzzer volume and ON/OFF switch OFF --> ON 10 kΩ or higher --> Below 1 Ω

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

    3. Reconnect the T5 ECU connector.
    4. Measure the voltage of the connector.

    Standard: 

    TERMINAL NUMBER SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    RSSI (T5-30) - Body ground G - Body ground Door control receiver output signal No key in ignition key cylinder, all doors closed and transmitter switch ON --> OFF Below 1 V --> Approx. 6 to 7 V --> Below 1 V
    RDA (T5-29) - Body ground Y - Body ground Door control receiver input signal No key in ignition key cylinder, all doors closed and transmitter switch ON --> OFF Below 1 V --> Approx. 6 to 7 V --> Below 1 V
    RCO (T5-15) - Body ground B-Y - Body ground Power source No key in ignition key cylinder, all doors closed and transmitter switch ON --> OFF 0 V --> 4.6 to 5.4 V
    BZR (T5-4) - BZR2 (T5-5) V-G - W-L Wireless door lock buzzer Wireless buzzer OFF --> ON 0 V --> Pulse generation

    If the result is not as specified, the theft warning ECU may have a malfunction.

  2. CHECK TRANSPONDER KEY ECU 
    Fig 2: Identifying Transponder Key ECU Terminals
    G03001397Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T9 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.

    Standard: 

    TERMINAL NUMBER SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    CPUB (T9-1) - GND (T9-14) V-Y - W-B Battery Always 10 to 14 V
    IG2 (T9-2) - GND (T9-14) B - W-B Ignition power supply Ignition switch OFF --> ON 0 V --> 10 to 14 V
    KSW (T9-3) - GND (T9-14) LG-B - W-B Unlock warning switch input No key in ignition key cylinder --> Key inserted 10 kΩ or higher --> Below 1 Ω
    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.

  3. CHECK DRIVER DOOR ECU 
    Fig 3: Identifying Driver Door ECU Terminals
    G03001398Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D25 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.

    Standard: 

    TERMINAL NUMBER SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    CPUB (D25-4) - GND (D25-1) V-Y - W-B Battery Always 10 to 14 V
    SIG (D25-5) - GND (D25-1) R-L - W-B Ignition power supply Ignition switch OFF --> ON 0 V --> 10 to 14 V
    BDR (D25-6) - GND (D25-1) R - W-B Door battery Always 10 to 14 V
    CTY (D25-23) - GND (D25-1) P-G - W-B Driver side door courtesy switch Driver side door closed --> Open 10 kΩ or higher --> Below 1 Ω
    GND (D25-1) - 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.

  4. CHECK FRONT PASSENGER DOOR ECU 
    Fig 4: Identifying Front Passenger Door ECU Terminals
    G03001399Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the F17 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.

    Standard: 

    TERMINAL NUMBER SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    CPUB (F17-4) - GND (F17-1) V-Y - W-B Battery Always 10 to 14 V
    SIG (F17-5) - GND (F17-1) R-L - W-B Ignition power supply Ignition switch OFF --> ON 0 V --> 10 to 14 V
    BDR (F17-6) - GND (F17-1) R - W-B Door battery Always 10 to 14 V
    CTY (F17-23) - GND (F17-1) P-G - W-B Passenger side door courtesy switch Passenger side door closed --> Open 10 kΩ or higher --> Below 1 Ω
    GND (F17-1) - 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.

  5. CHECK REAR DOOR LH ECU 
    Fig 5: Identifying Rear Door LH ECU Terminals
    G03001400Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R13 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.

    Standard: 

    TERMINAL NUMBER SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    CPUB (R13-1) - GND (R13-6) V-Y - W-B Battery Always 10 to 14 V
    SIG (R13-26) - GND (R13-6) R-L - W-B Ignition power supply Ignition switch OFF --> ON 0 V --> 10 to 14 V
    BDR (R13-2) - GND (R13-6) R-B - W-B Door battery Always 10 to 14 V
    CTY (R13-7) - GND (R13-6) L - W-B Rear door LH courtesy switch Rear door LH closed --> Open 10 kΩ or higher --> Below 1 Ω
    GND (R13-6) - 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.

  6. CHECK REAR DOOR RH ECU 
    Fig 6: Identifying Rear Door RH ECU Terminals
    G03001401Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R14 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.

    Standard: 

    TERMINAL NUMBER SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    CPUB (R14-1) - GND (R14-6) V-Y - W-B Battery Always 10 to 14 V
    SIG (R14-26) - GND (R14-6) R-L - W-B Ignition power supply Ignition switch OFF --> ON 0 V --> 10 to 14 V
    BDR (R14-2) - GND (R14-6) R-W - W-B Door battery Always 10 to 14 V
    CTY (R14-7) - GND (R14-6) L - W-B Rear door RH courtesy switch Rear door RH closed --> Open 10 kΩ or higher --> Below 1 Ω
    GND (R14-6) - 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.

  7. CHECK DRIVER SIDE J/B (DRIVER SIDE J/B ECU) 
    Fig 7: Identifying Driver Side J/B (DRIVER SIDE J/B ECU) Terminals
    G03001402Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D5 ECU connector.
    2. Disconnect the DC, DD and DG J/B connectors.
    3. Measure the voltage and resistance of the wire harness side connectors.

      Standard: 

      TERMINAL NUMBER SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (DC-8) - GND2 (D5-1) R-W - W-B Ignition power supply Ignition switch OFF --> ON 0 V --> 10 to 14 V
      ACC (DG-7) - GND2 (D5-1) W-G - W-B Ignition power supply Ignition switch OFF --> ON 0 V --> 10 to 14 V
      HAZ (DD-3) - GND2 (D5-1) W - W-B Hazard lamp power supply (w/compass) Always 10 to 14 V
      HAZ (DG-3) - GND2 (D5-1) W - W-B Hazard lamp power supply (w/o compass) Always 10 to 14 V
      GND2 (D5-1) - 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.

    4. Reconnect the D5 ECU connector.
    5. Reconnect the DC, DD and DG J/B connectors.
    6. Measure the voltage of the connectors.

    Standard: 

    TERMINAL NUMBER SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    HAZ (D5-2) - GND2 (D5-1) O - W-B Hazard lamp drive Answer-back OFF --> ON 10 to 14 V --> Pulse generation

    If the result is not as specified, the driver side J/B may have a malfunction.

  8. CHECK LUGGAGE ROOM J/B ASSY (LUGGAGE ROOM J/B ECU) 
    Fig 8: Identifying Luggage Room J/B Assy (LUGGAGE ROOM J/B ECU) Terminals
    G03001403Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L12 and L14 ECU connectors.
    2. Disconnect the LC and LF J/B connectors.
    3. Measure the voltage and resistance of the wire harness side connectors.

    Standard: 

    TERMINAL NUMBER SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    IG (O) (LC-11) - Body ground P - Body ground Ignition power supply Ignition switch OFF --> ON 0 V --> 10 to 14 V
    ACC (O) (LF-5) - Body ground GR - Body ground Ignition power supply Ignition switch OFF --> ON 0 V --> 10 to 14 V
    LCTY (L12-4) - Body ground G - Body ground Luggage compartment door courtesy switch Luggage compartment door closed --> Open 10 kΩ or higher --> Below 1 Ω
    BDCY (L14-8) - Body ground L - Body ground Luggage compartment door lock switch Luggage compartment door closed --> Open 10 kΩ or higher --> Below 1 Ω
    SG (L14-5) - 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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