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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 CERTIFICATION ECU 
    Fig 1: Identifying ECU Connectors L15 And L16
    G04951601Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L15 ECU connector
    2. Measure the voltage and resistance according to the value(s) in the table below
      VOLTAGE AND RESISTANCE CHART

      Terminal No (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L15-1 (+B1) - L15-17 (E) L - W-B +B power supply Always 11 to 14 V
      L15-18 (IG) - L15-17 (E) L - W-B Ignition power supply Power switch OFF Below 1 V
      Power switch ON (IG) 11 to 14 V
      L15-20 (CUTB) - L15-17 (E) R - W-B +B 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, the wire harness side may have a malfunction.

    3. Reconnect the L15 ECU connector.
    4. Measure the voltage according to the value(s) in the table below
      VOLTAGE SPECIFICATION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L15-33 (CLG1) - L15-34 (CG1B) P - V Door electrical key oscillator (for front LH) sensor signal All doors closed, all doors locked and power switch OFF Alternating between 5 V and below 1 V
      Door unlocked or door open Below 1 V
      L15-35 (CLG2) - L15-36 (CG2B) LG - L Door electrical key oscillator (for front RH) sensor signal All doors closed, all doors locked and power switch OFF Alternating between 5 V and below 1 V
      Door unlocked or door open Below 1 V
      L16-8 (CLG3) - L16-9 (CG3B) R - G Door electrical key oscillator (for rear LH) sensor signal All doors closed, all doors locked and power switch OFF Alternating between 5 V and below 1 V
      Door unlocked or door open Below 1 V
      L16-10 (CLG4) - L16-11 (CG4B) LG - L Door electrical key oscillator (for rear RH) sensor signal All doors closed, all doors locked and power switch OFF Alternating between 5 V and below 1 V
      Door unlocked or door open Below 1 V
      L15-11 (CLG5) - L15-12 (CG5B) L - Y Indoor electrical key oscillator (for front floor) sensor signal 30 seconds after driver side door opened and closed, power switch OFF Alternating between 5 V and below 1 V
      Within 30 seconds after driver side door opened and closed, power switch OFF Below 1 V
      L15-13 (CLG6) - L15-14 (CG6B) B - Y Indoor electrical key oscillator (for rear floor) sensor signal 30 seconds after driver side door opened and closed, power switch OFF Alternating between 5 V and below 1 V
      Within 30 seconds after driver side door opened and closed, power switch OFF Below 1 V
      L15-15 (CLG7) - L15-16 (CG7B) W - B Indoor electrical key oscillator (for luggage compartment) sensor signal Luggage compartment door opener switch off Alternating between 5 V and below 1 V
      Luggage compartment door opener switch on Below 1 V
      L15-31 (CLG8) - L15-32 (CG8B) V - P Electrical key antenna (for luggage compartment) sensor signal Luggage compartment door opener switch off Alternating between 5 V and below 1 V
      Luggage compartment door opener switch on Below 1 V
      L15-29 (RC0) - L15-17 (E) G - W-B Door control receiver power source All doors closed, all doors locked and power switch OFF 0 to 6 V
      Door unlocked or door open Below 1 V
      L-15-37 (ASEL) - L15-17 (E) L - W-B Door control receiver select signal Power switch OFF, luggage compartment door closed Below 1 V
      Power switch OFF, luggage compartment door open 4 6 to 5 4 V
      L15-38 (RDA) - L15-17 (E) R - W-B Door control receiver data input signal All doors closed, all doors locked and Power switch OFF Below 2 V
      Door unlocked or door open 4 5 to 6 V
      L-15-39 (RSSI) - L15-17 (E) W - W-B Door control receiver electric wave existence signal All doors closed, all doors locked and power switch OFF 0 to 5 V
      Door unlocked or door open Below 2 V

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

  2. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) 
    Fig 2: Identifying Main Body ECU Connector Terminals (Driver Side Junction Block)
    G04943821Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the DA, DD, DF, L11, L12, L13 and A68 ECU connectors
    2. Measure the voltage and resistance according to the value(s) in the table below
      VOLTAGE AND RESISTANCE CHART

      Terminal No (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L11-1 (GND3) - DA-41 (GND1) W-B - W-B Ground Always Below 1 Ω
      DA-40 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      DA-40 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      DF-1 (ALTB) - Body ground B - Body ground IG power supply Always 11 to 14 V
      L12-1 (AM2) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      L13-6 (AM1) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      L13-24 (DCTY) - Body ground W - Body ground Driver side door courtesy light switch input Driver side door is open Below 1 Ω
      Driver side door is closed 10 kΩ or higher
      L12-21 (PCTY) - Body ground L - Body ground Passenger side door courtesy light switch input Passenger side door is open Below 1 Ω
      Passenger side door is closed 10 kΩ or higher
      L12-7 (RCTY) - Body ground R - Body ground Rear RH side door courtesy light switch input Rear RH side door is open Below 1 Ω
      Rear RH side door is closed 10 kΩ or higher
      DD-12 (LCTY) - Body ground L - Body ground Rear LH side door courtesy light switch input Rear LH side door is open Below 1 Ω
      Rear LH side door is closed 10 kΩ or higher

      If the result is not as specified, the wire harness side may have a malfunction

  3. CHECK FRONT DOOR ECU LH 
    Fig 3: Identifying N10 ECU Connector Terminals
    G05783122Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N10 ECU connector
    2. Measure the resistance and voltage according to the value(s) in the table below
      RESISTANCE AND VOLTAGE SPECIFICATION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      N10-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      N10-6 (BDR) - N10-1 (GND) O - W-B Battery power supply Always 11 to 14 V
      N10-11 (CPUB) - N10-1 (GND) B - W-B Battery power supply Always 11 to 14 V

      If the result is not as specified, the wire harness side may have a malfunction

    3. Reconnect the N10 ECU connector
    4. Measure the voltage according to the value(s) in the table below
      VOLTAGE SPECIFICATION

      Terminal No (Symbols) Wiring Color Terminal Description Condition Specified Condition
      N10-12 (OSCB) - N10-19 (OSCE) B - V Power source supply Always 11 to 14 V
      N10-14 (SENS) - N10-1 (GND) Y - W-B Touch sensor detection signal Outside door handle touched 11 to 14 V
      Outside door handle not touched Below 1 V
      N10-15 (SEL) - N10-1 (GND) O - W-B Touch sensor activation control signal Key at least 3 m (9 84 ft) away from door 11 to 14 V
      Key close to door Below 1 V
      N10-20 (TRG+) - N10-1 (GND) L - W-B Lock switch signal Power switch OFF, all doors closed and lock switch not pushed Pulse generation (see  ewaveform 1 or  f2)
      Lock switch pushed Below 1 V

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

    5. Using an oscilloscope, check the waveform 1

      Waveform 1 (Reference): 

      WAVEFORM REFERENCE

      Item Content
      Terminal No (Symbols) N10-20 (TRG+) - N10-1 (GND)
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Power switch OFF, all doors closed and lock switch not pushed
      Fig 4: Identifying Waveform 1
      G04951607Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check the waveform 2

      Waveform 2 (Reference): 

      WAVEFORM REFERENCE

      Item Content
      Terminal No (Symbols) N10-20 (TRG+) - N10-1 (GND)
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Power switch OFF, all doors closed and lock switch not pushed
      Fig 5: Identifying Waveform 2
      G04951605Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CHECK FRONT DOOR ECU RH 
    Fig 6: Identifying N1 ECU Connector Terminals
    G05783125Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N1 ECU connector
    2. Measure the resistance and voltage according to the value(s) in the table below
      RESISTANCE AND VOLTAGE SPECIFICATION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      N1-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      N1-6 (BDR) - N1-1 (GND) O - W-B Battery power supply Always 11 to 14 V
      N1-11 (CPUB) - N1-1 (GND) R - W-B Battery power supply Always 11 to 14 V

      If the result is not as specified, the wire harness side may have a malfunction

    3. Reconnect the N1 ECU connector.
    4. Measure the voltage according to the value(s) in the table below
      VOLTAGE SPECIFICATION

      Terminal No (Symbols) Wiring Color Terminal Description Condition Specified Condition
      N1-12 (OSCB) - N1-19 (OSCE) B - V Power source supply Always 11 to 14 V
      N1-14 (SENS) - N1-1 (GND) Y - W-B Touch sensor detection signal Outside door handle touched 11 to 14 V
      Outside door handle not touched Below 1 V
      N1-15 (SEL) - N1-1 (GND) O - W-B Touch sensor activation control signal Key at least 3 m (9 84 ft) away from door 11 to 14 V
      Key close to door Below 1 V
      N1-20 (TRG+) - N1-1 (GND) L - W-B Lock switch signal Power switch OFF, all doors closed and lock switch not pushed Pulse generation (see  ewaveform 1 or  f2)
      Lock switch pushed Below 1 V

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

    5. Using an oscilloscope, check the waveform 1.

      Waveform 1 (Reference): 

      WAVEFORM REFERENCE

      Item Content
      Terminal No (Symbols) N1-20 (TRG+) - N1-1 (GND)
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Power switch OFF, all doors closed and lock switch not pushed
      Fig 7: Identifying Waveform 1
      G04951607Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check the waveform 2

      Waveform 2 (Reference): 

      WAVEFORM REFERENCE

      Item Content
      Terminal No (Symbols) N1-20 (TRG+) - N1-1 (GND)
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Power switch OFF, all doors closed and lock switch not pushed
  5. CHECK REAR DOOR ECU LH 
    Fig 8: Identifying Waveform 2
    G04951605Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 9: Identifying O14 ECU Connector Terminals
    G04951609Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the O14 ECU connector
    2. Measure the resistance and voltage according to the value(s) in the table below
      RESISTANCE AND VOLTAGE SPECIFICATION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      O14-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      O14-6 (BDR) - O14-1 (GND) L - W-B Battery power supply Always 11 to 14 V
      O14-11 (CPUB) - O14-1 (GND) R - W-B Battery power supply Always 11 to 14 V

      If the result is not as specified, the wire harness side may have a malfunction.

    3. Reconnect the O14 ECU connector.
    4. Measure the voltage according to the value(s) in the table below
      VOLTAGE SPECIFICATION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      O14-12 (OSCB) - O14-15 (OSCE) B - V Power source supply Always 11 to 14 V
      O14-14 (SENS) - O14-1 (GND) Y - W-B Touch sensor detection signal Outside door handle touched 11 to 14 V
      Outside door handle not touched Below 1 V
      O14-16 (SEL) - O14-1 (GND) O - W-B Touch sensor activation control signal Key at least 3 m (9 84 ft) away from door 11 to 14 V
      Key close to door Below 1 V
      O14-20 (TRG+) - O14-1 (GND) L - W-B Lock switch signal Power switch OFF, all doors closed and lock switch not pushed Pulse generation (see  ewaveform 1 or  f2)
      Lock switch pushed Below 1 V

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

    5. Using an oscilloscope, check the waveform 1.

      Waveform 1 (Reference): 

      WAVEFORM REFERENCE

      Item Content
      Terminal No (Symbols) O14-20 (TRG+) - O14-1 (GND)
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Power switch OFF, all doors closed and lock switch not pushed
      Fig 10: Identifying Waveform 1
      G04951607Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check the waveform 2

      Waveform 2 (Reference): 

      WAVEFORM REFERENCE

      Item Content
      Terminal No (Symbols) O14-20 (TRG+) - O14-1 (GND)
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Power switch OFF, all doors closed and lock switch not pushed
  6. CHECK REAR DOOR ECU RH 
    Fig 11: Identifying Waveform 2
    G04951605Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 12: Identifying O3 ECU Connector Terminals
    G04951612Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the O3 ECU connector
    2. Measure the resistance and voltage according to the value(s) in the table below
      RESISTANCE AND VOLTAGE SPECIFICATION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      O3-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      O3-6 (BDR) - O3-1 (GND) L - W-B Battery power supply Always 11 to 14 V
      O3-11 (CPUB) - O3-1 (GND) R - W-B Battery power supply Always 11 to 14 V

      If the result is not as specified, the wire harness side may have a malfunction

    3. Reconnect the O3 ECU connector
    4. Measure the voltage according to the value(s) in the table below
      VOLTAGE SPECIFICATION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      O3-12 (OSCB) - O3-15 (OSCE) B - V Power source supply Always 11 to 14 V
      O3-14 (SENS) - O3-1 (GND) Y - W-B Touch sensor detection signal Outside door handle touched 11 to 14 V
      Outside door handle not touched Below 1 V
      O3-16 (SEL) - O3-1 (GND) O - W-B Touch sensor activation control signal Key at least 3 m (9 84 ft) away from door 11 to 14 V
      Key close to door Below 1 V
      O3-20 (TRG+) - O3-1 (GND) L - W-B Lock switch signal Power switch OFF, all doors closed and lock switch not pushed Pulse generation (see  ewaveform 1 or  f2)
      Lock switch pushed Below 1 V

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

    5. Using an oscilloscope, check the waveform 1

      Waveform 1 (Reference): 

      WAVEFORM REFERENCE

      Item Content
      Terminal No (Symbols) O3-20 (TRG+) - O3-1 (GND)
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Power switch OFF, all doors closed and lock switch not pushed
      Fig 13: Identifying Waveform 1
      G04951607Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check the waveform 2

      Waveform 2 (Reference): 

      WAVEFORM REFERENCE

      Item Content
      Terminal No (Symbols) O3-20 (TRG+) - O3-1 (GND)
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Power switch OFF, all doors closed and lock switch not pushed
  7. CHECK POWER TRUNK LID CONTROL ECU 
    Fig 14: Identifying Waveform 2
    G04951605Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 15: Identifying S43 ECU Connector Terminals
    G04951618Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S43 ECU connector.
    2. Measure the voltage and resistance according to the value(s) in the table below
      VOLTAGE AND RESISTANCE CHART

      Terminal No (Symbols) Wiring Color Terminal Description Condition Specified Condition
      S43-11 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      S43-10 (ECUB) - Body ground B - Body ground Battery power supply Always 11 to 14 V
      S43-12 (B) - Body ground O - Body ground Battery power supply Always 11 to 14 V

      If the result is not as specified, the wire harness side may have a malfunction

    3. Reconnect the S43 ECU connector
    4. Measure the voltage according to the value(s) in the table below
      VOLTAGE SPECIFICATION

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      S43-19 (LPSW) - S43-11 (GND) BR - W-B Luggage opener switch signal Power switch ON (IG) and luggage compartment door opener switch pushed Below 1 V
      Power switch ON (IG), luggage compartment door closed and luggage opener switch not pushed Pulse generation (see  ewaveform 1)
      S43-22 (LCTY) - S43-11 (GND) G - W-B Luggage compartment door courtesy light switch signal Power switch ON (IG) and luggage compartment door is open Below 1 V
      Power switch ON (IG) and luggage compartment door is closed Pulse generation (see  f waveform 2)

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

    5. Using an oscilloscope, check the waveform 1

      Waveform 1 (Reference): 

      WAVEFORM REFERENCE

      Item Content
      Terminal No (Symbols) S43-19 (LPSW) - S43-11 (GND)
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Power switch ON (IG), luggage compartment door closed and luggage opener switch not pushed
      Fig 16: Identifying Waveform 1
      G04951616Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check the waveform 2.

      Waveform 2 (Reference): 

      WAVEFORM REFERENCE

      Item Content
      Terminal No (Symbols) S43-22 (LCTY) - S43-11 (GND)
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Power switch ON (IG) and luggage compartment door is closed
      Fig 17: Identifying Waveform 2
      G04951620Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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