LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2008 >> LX 570 >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Theft Deterrent / Keyless Entry >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function) >> Terminals Of Ecu

Terminals Of Ecu

  1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    Fig 1: Identifying Connector Terminals Of ECU
    G05630847Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E29 ECU connector.
    2. Measure the resistance and voltage of the wire harness side connector.
      CONNECTORS TERMINAL REFERENCE CHART

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      E29-17 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E29-1 (+B) - Body ground B - Body ground +B power supply Always 11 to 14 V
      E29-18 (IG) - Body ground B - Body ground Ignition power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      E29-3 (TSW1) - E29-17 (E) G - W-B Door outside handle (driver side) lock switch signal Switch released 10 kΩ or higher
      Switch pressed in Below 1 Ω
      E29-4 (TSW2) - E29-17 (E) BR - W-B Door outside handle (front passenger side) lock switch signal Switch released 10 kΩ or higher
      Switch pressed in Below 1 Ω
      E30-25 (TSW3) - E29-17 (E) G - W-B Door outside handle (rear LH) lock switch signal Switch released 10 kΩ or higher
      Switch pressed in Below 1 Ω
      E30-26 (TSW4) - E29-17 (E) G - W-B Door outside handle (rear RH) lock switch signal Switch released 10 kΩ or higher
      Switch pressed in Below 1 Ω
      E29-7 (TSW5) - E29-17 (E) L - W-B Back door lock switch signal Switch released 10 kΩ or higher
      Switch pressed in Below 1 Ω

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

    3. Reconnect the E29 ECU connector.
    4. Measure the voltage of the connector.
      CONNECTORS TERMINAL REFERENCE CHART

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      E29-33 (CLG1) - E29-34 (CG1B) L - W Door electrical key oscillator (driver side) sensor signal All doors closed, all doors locked and engine switch off Alternating between 5 V and below 1 V
      Door unlocked or door open Below 1 V
      E29-22 (SEN1) - E29-17 (E) R - W-B Touch sensor detection signal Outside door handle touched 11 to 14 V
      Outside door handle not touched Below 1 V
      E29-5 (SEL1) - E29-17 (E) Y - W-B Touch sensor activation control signal Key at least 5 m (16 4 ft) away from door 11 to 14 V
      Key moved near outside door handle Below 1 V
      E29-35 (CLG2) - E29-36 (CG2B) L - R Door electrical key oscillator (front passenger side) sensor signal All doors closed, all doors locked and engine switch off Alternating between 5 V and below 1 V
      Door unlocked or door open Below 1 V
      E29-23 (SEN2) - E29-17 (E) R - W-B Touch sensor detection signal Outside door handle touched 11 to 14 V
      Outside door handle not touched Below 1 V
      E29-6 (SEL2) - E29-17 (E) Y - W-B Touch sensor activation control signal Key at least 5 m (16 4 ft) away from door 11 to 14 V
      Key moved near outside door handle Below 1 V
      E30-8 (CLG3) - E30-9 (CG3B) L - W Door electrical key oscillator (rear LH) sensor signal All doors dosed, all doors locked and engine switch off Alternating between 5 V and below 1 V
      Door unlocked or door open Below 1 V
      E30-28 (SEN3) - E29-17 (E) R - W-B Touch sensor detection signal Outside door handle touched 11 to 14 V
      Outside door handle not touched Below 1 V
      E30-1 (SEL3) - E29-17 (E) Y - W-B Touch sensor activation control signal Key at least 5 m (16 4 ft) away from door 11 to 14 V
      Key moved near outside door handle Below 1 V
      E30-10 (CLG4) - E30-11 (CG4B) L - W Door electrical key oscillator (rear RH) sensor signal All doors closed, all doors locked and engine switch off Alternating between 5 V and below 1 V
      Door unlocked or door open Below 1 V
      E30-27 (SEN4) - E29-17 (E) R - W-B Touch sensor detection signal Outside door handle touched 11 to 14 V
      Outside door handle not touched Below 1 V
      E30-2 (SEL4) - E29-17 (E) Y - W-B Touch sensor activation control signal Key at least 5 m (16 4 ft) away from door 11 to 14 V
      Key moved near outside door handle Below 1 V
      E29-11 (CLG5) - E29-12 (CG5B) SB - V Indoor electrical key antenna (for front floor) sensor signal 30 seconds after driver side door opened and closed, engine switch off Alternating between 5 V and below 1 V
      Within 30 seconds after driver side door opened and closed, engine switch off Below 1 V
      E29-13 (CLG6) - E29-14 (CG6B) R - SB Indoor electrical key antenna (for rear floor) sensor signal 30 seconds after driver side door opened and closed, engine switch off Alternating between 5 V and below 1 V
      Within 30 seconds after driver side door opened and closed, engine switch off Below 1 V
      E29-15 (CLG7) - E29-16 (CG7B) GR - W Indoor electrical key antenna (for luggage compartment) sensor signal 30 seconds after driver side door opened and closed, engine switch off Alternating between 5 V and below 1 V
      Within 30 seconds after driver side door opened and closed, engine switch off Below 1 V
      E29-31 (CLG8) - E29-32 (CG8B) G - GR Back door electrical key antenna (for outside luggage compartment) sensor signal Back door opener switch off Alternating between 5 V and below 1 V
      Back door opener switch on Below 1 V
      E29-29 (RCO) - E29-17 (E) B - W-B Door control receiver power source None of key switches pressed → Any of key switches pressed Below 1 V → 4.5 to 5 5 V → Below 1 V
      E29-39 (RSSI) - E29-17 (E) L - W-B Door control receiver electric wave existence signal None of key switches pressed → Any of key switches pressed 11 to 14 V → Below 1 V
      E29-38 (RDA) - E29-17 (E) LG - W-B Door control receiver data input signal None of key switches pressed → Any of key switches pressed 11 to 14 V → Below 1 V
      E29-21 (BZR) - E29-17 (E) LG - W-B Wireless door lock buzzer signal Answer-back on Pulse generation
      Answer-back off Below 1 V

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

  2. CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH) 
    Fig 2: Identifying Main Body ECU Connector Terminal (Cowl Side Junction Block LH)
    G05636827Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E1, E2, E3, 2A, 2B and 2D ECU connectors.
    2. Measure the resistance and voltage of the wire harness side connectors.
      CONNECTORS TERMINAL REFERENCE CHART

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      2D-62 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E3-1 (GND3) - Body ground BR - Body ground Ground Always Below 1 Ω
      2A-1 (ALTB) - Body ground B - Body ground ALTB power supply Always 11 to 14 V
      2B-20 (BATB) - Body ground L - Body ground BATB power supply Always 11 to 14 V
      E1-6 (AM1) - Body ground W - Body ground AM1 power supply Always 11 to 14 V
      E2-1 (AM2) - Body ground W - Body ground AM2 power supply Always 11 to 14 V
      2A-1 (IG) - Body ground B - Body ground IG1 signal Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      2A-1 (ACC) - Body ground B - Body ground ACC signal Engine switch on (ACC) 11 to 14 V
      Engine switch off Below 1 V

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

    3. Reconnect the E1, E2, E3, 2A, 2B and 2D ECU connectors.
    4. Measure the voltage of the connectors.
      CONNECTORS TERMINAL REFERENCE CHART

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      E1-24 (DCTY) - Body ground L - Body ground Driver side door courtesy switch input Driver side door open Below 1 V
      Engine switch off, and driver side door courtesy switch off Pulse generation (see  ewaveform 1 or  f2)
      E2-21 (PCTY) - Body ground Y - Body ground Front passenger side door courtesy switch input Front passenger side door open Below 1 V
      Engine switch off, and passenger side door courtesy switch off Pulse generation (see  gwaveform 3 or  h4)
      2C-2 (LCTY) - Body ground W - Body ground Rear door LH courtesy light switch input Rear door LH open Below 1 V
      Engine switch off, and rear LH side door courtesy switch off Pulse generation (see  iwaveform 5 or  j6)
      E2-7 (RCTY) - Body ground G - Body ground Rear door RH courtesy light switch input Rear door RH open Below 1 V
      Engine switch off, and rear RH side door courtesy switch off Pulse generation (see  kwaveform 7 or  l8)
      E2-25 (BCTY) - Body ground W - Body ground Back door courtesy light switch input Back door open Below 1 V
      Engine switch off, and back door closed Pulse generation (see  mwaveform 9 or  n10)
      E3-4 (HAZ) - Body ground O - Body ground Hazard warning light signal Answer-back on Below 1 V
      Answer-back off 11 to 14 V
      E1-26 (BDSU) - Body ground L - Body ground Back door opener switch input Back door lock opener switch off Below 1 V
      Back door lock opener switch on Pulse generation (see  owaveform 11 or  p12)

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

    5. Using an oscilloscope, check waveform 1.

      Waveform 1 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Terminal No (Symbol) E1-24 (DCTY) - Body ground
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Engine switch off, and driver side door courtesy switch off
      Fig 3: Identifying Waveform 1 (Reference)
      G05639684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check waveform 2.

      Waveform 2 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Terminal No (Symbol) E1-24 (DCTY) - Body ground
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Engine switch off, and driver side door courtesy switch off
      Fig 4: Identifying Waveform 2 (Reference)
      G05639691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Using an oscilloscope, check waveform 3.

      Waveform 3 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Terminal No (Symbol) E2-21 (PCTY) - Body ground
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Engine switch off, and passenger side door courtesy switch off
      Fig 5: Identifying Waveform 3 (Reference)
      G05639686Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Using an oscilloscope, check waveform 4.

      Waveform 4 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Terminal No (Symbol) E2-21 (PCTY) - Body ground
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Engine switch off, and passenger side door courtesy switch off
      Fig 6: Identifying Waveform 4 (Reference)
      G05639687Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. Using an oscilloscope, check waveform 5.

      Waveform 5 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Terminal No (Symbol) 2C-2 (LCTY) - Body ground
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Engine switch off, and rear LH side door courtesy switch off
      Fig 7: Identifying Waveform 5 (Reference)
      G05639684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    10. Using an oscilloscope, check waveform 6.

      Waveform 6 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Terminal No (Symbol) 2C-2 (LCTY) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV
      Condition Engine switch off, and rear LH side door courtesy switch off
      Fig 8: Identifying Waveform 6 (Reference)
      G05639691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    11. Using an oscilloscope, check waveform 7.

      Waveform 7 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Terminal No. (Symbol) E2-7 (RCTY) - Body ground
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Engine switch off, and rear RH side door courtesy switch off
      Fig 9: Identifying Waveform 7 (Reference)
      G05639684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    12. Using an oscilloscope, check waveform 8.

      Waveform 8 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Terminal No (Symbol) E2-7 (RCTY) - Body ground
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Engine switch off, and rear RH side door courtesy switch off
      Fig 10: Identifying Waveform 8 (Reference)
      G05639691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    13. Using an oscilloscope, check waveform 9.

      Waveform 9 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Terminal No (Symbol) E2-25 (BCTY) - Body ground
      Tool Setting 5 V/DIV, 20 ms/DIV.
      Condition Engine switch off, and back door closed
      Fig 11: Identifying Waveform 9 (Reference)
      G05639684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    14. Using an oscilloscope, check waveform 10.

      Waveform 10 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Terminal No (Symbol) E2-25 (BCTY) - Body ground
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Engine switch off, and back door closed
      Fig 12: Identifying Waveform 10 (Reference)
      G05639691Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    15. Using an oscilloscope, check waveform 11.

      Waveform 11 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Terminal No (Symbol) E1-26 (BDSU) - Body ground
      Tool Setting 5 V/DIV, 20 ms/DIV.
      Condition Engine switch off, all doors closed and back door lock opener switch on
      Fig 13: Identifying Waveform 11 (Reference)
      G05639686Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    16. Using an oscilloscope, check waveform 12.

      Waveform 12 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Terminal No (Symbol) E1-26 (BDSU) - Body ground
      Tool Setting 5 V/DIV, 20 ms/DIV
      Condition Engine switch off, all doors closed and back door lock opener switch on
      Fig 14: Identifying Waveform 12 (Reference)
      G05639687Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. CHECK POWER BACK DOOR UNIT (w/ Power Back Door) 
    Fig 15: Identifying Power Back Door Unit Connector Terminal L36 (W/ Power Back Door)
    G05765309Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L36 unit connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      CONNECTORS TERMINAL REFERENCE CHART

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L36-10 (ECUB) - Body ground R - Body ground ECUB power supply Always 11 to 14 V
      L36-11 (GND) - Body ground W-B - Body ground Body ground Always Below 1 Ω

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

    3. Reconnect the L36 unit connector.
    4. Measure the voltage according to the value(s) in the table below.
      CONNECTORS TERMINAL REFERENCE CHART

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L36-2 (DC+) - L36-1 (DC-) R - B Power back door lock motor circuit Back door lock motor is operating 11 to 14 V
      L36-2 (DC+) - L36-1 (DC-) R - B Power back door lock motor circuit Back door lock motor is stopped Below 1 V

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

scientia non olet · About LEMON Manuals