LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2007 >> LS 460L >> Repair and Diagnosis >> Accessories & Equipment >> Warning Systems >> Park Assist / Monitoring >> Intuitive Parking Assist System >> Terminals Of Ecu

Terminals Of Ecu

  1. CHECK CLEARANCE WARNING ECU (w/o Advanced Parking Guidance System) 
    Fig 1: Identifying Clearance Warning ECU (W/O Advanced Parking Guidance System)
    G04951826Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L19 ECU connector.
    2. Measure the voltage and resistance according to value(s) in the table below.
      CLEARANCE WARNING ECU (W/O ADVANCED PARKING GUIDANCE SYSTEM) (DISCONNECT)

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L19-15(IG)-L19-17(E) V-W-B IG signal / IG power source signal Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      L19-17 (E) - Body ground W-B - Body ground ECU ground Always Below 1 Ω
    3. Reconnect the L19 ECU connector.
    4. Measure the resistance, voltage and waveform according to value(s) in the table below.
      CLEARANCE WARNING ECU (W/O ADVANCED PARKING GUIDANCE SYSTEM) (RECONNECT)

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L19-1 (CBZ)-L19-17(E) W-B Front clearance warning buzzer signal Buzzer not sounding Below 1 V
      Buzzer sounding Waveform 2
      L19-2(EE)-L19-17(E) B-W-B Front clearance warning buzzer signal Buzzer not sounding Below 1 V
      Buzzer sounding Waveform 2
      L19-7(BOR)-L19-18(E2) B-R Rear sensor circuit power source Engine switch off Below 1 V
      Engine switch on (IG), clearance sonar main switch ON 7.2 to 8.8 V
      L19-9(SOF)-L19-19(E1) G-R Front sensor circuit power source Engine switch on (IG), clearance sonar main switch ON Waveform 1
      L19-10(BBZ)-L19-17(E) W-B Rear clearance warning buzzer signal Engine switch off Below 1 V
      Engine switch on (IG) 7.2 to 8.8 V
      L19-11 (EF)-L19-17(E) B-W-B Rear clearance warning buzzer signal Buzzer sounding Waveform 2
      L19-18 (E2)-L19-17(E) R-W-B Rear sensor circuit ground Always Below 1 Ω
      L19-19(E1)-L19-17(E) R-W-B Front sensor circuit ground Always Below 1 Ω
      L19-21 (BOF)-L19-19(E1) B-R Front sensor circuit power source Engine switch off Below 1 V
      Engine switch on (IG), clearance sonar main switch ON 7.2 to 8.8 V
      L19-24(SOR)-L19-18 (E2) G-R Rear sensor circuit power source Engine switch on (IG), clearance sonar main switch ON Waveform 1
    5. Using an oscilloscope, check waveform 1.
      Fig 2: Identifying Waveform 1
      G04951827Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Waveform 1 (Reference) 

      WAVEFORM 1 REFERENCE

      Item Content
      Terminal No. (Symbols)
      • CH:1 L19-9(SOF)-L19-19(E1)
      • CH:2 L19-24(SOR)-L19-18(E2)
      Tool Setting 2 V/DIV., 1 msec./DIV.
      Condition Engine switch on (IG), clearance sonar main switch ON.
    6. Using an oscilloscope, check waveform 2.
      Fig 3: Identifying Waveform 2
      G04951828Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Waveform 2 (Reference) 

      WAVEFORM 2 REFERENCE

      Item Content
      Terminal No. (Symbols)
      • L19-1 (CBZ)-L19-17(E)
      • L19-2(EE)-L19-17(E)
      • L19-11 (EF)-L19-17(E)
      Tool Setting 5 V/DIV., 1 msec/DIV.
      Condition Engine switch on (IG), shift lever in R position
      NOTE:
      • The waveforms of CBZ and EE are offset by a half cycle. EF is not synchronized with CBZ and EE.
      • The waveform's amplitude varies depending on the volume setting.
  2. CHECK PARKING ASSIST ECU (w/o Advanced Parking Guidance System) 
    Fig 4: Identifying Parking Assist ECU (W/O Advanced Parking Guidance System)
    G04951829Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L90 ECU connector.
    2. Measure the voltage and resistance according to value(s) in the table below.
      PARKING ASSIST ECU (W/O ADVANCED PARKING GUIDANCE SYSTEM) (DISCONNECT)

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L90-1(IG)-L90-4(GND1) V - Body ground Ignition signal input Engine switch on (IG) 11 to 14 V
      L90-4(GND1)-Body ground W-B - Body ground Ground Always Below 1 Ω
      L90-6 (+B) - L90-4 (GND1) R - Body ground Power source Always 11 to 14 V
      L90-14 (ACC) - L90-4 (GND1) LG - Body ground Accessory Engine switch off Below 1 V
      Engine switch on (ACC) 11 to 14 V
    3. Reconnect the L90 ECU connector.
    4. Measure the resistance, voltage and waveform according to value(s) in the table below.
      PARKING ASSIST ECU (W/O ADVANCED PARKING GUIDANCE SYSTEM) (RECONNECT)

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L90-8 (CSB3) - L90-27 (CSG3) R-V Front side sensor signal Engine switch off Below 1 V
      Engine switch on (IG), clearance sonar main switch OFF --> ON 7.2 to 8.8 V
      L90-27 (CSG3) - L90-4 (GND1) V-W-B Ground Always Below 1 Ω
      L90-28 (LIN3) - L90-27 (CSG3) G-V Front side sensor signal Engine switch on (IG), clearance sonar main switch OFF --> ON Waveform 1
      L91-11 (CGNI)-Body ground R - Body ground Ground Always Below 1 Ω
      L91-9(EF)-L90-4 (GND1) B-W-B Front clearance warning buzzer signal Buzzer not sounding Below 1 V
      Buzzer sounding Waveform 2
      L91-25(BBZ)-L91-19 (EF) W-B Rear clearance warning buzzer signal Buzzer not sounding Below 1 V
      Buzzer sounding 7.2 to 8.8 V
      L91-26(CBZ)-L90-4 (GND1) W-B Front clearance warning buzzer signal Buzzer not sounding Below 1 V
      Buzzer sounding Waveform 2
      L91-27(EE)-L90-4 (GND1) B-W-B Front clearance warning buzzer signal Buzzer not sounding Below 1 V
      Buzzer sounding Waveform 2
      L91-28(CSB2)-l_91-29 (CSG2) P-R Rear sensor signal Engine switch on (IG), clearance sonar main switch OFF --> ON 7.2 to 8.8 V
      L91-29(CSG2)-L90-4 (GND1) R-W-B Ground Always Below 1 Ω
      L91-30(LIN2)-L90-4 (GND1) G-W-B Rear sensor signal Engine switch on (IG), clearance sonar main switch OFF --> ON Waveform 1
      L91-31 (CSB1)-L90-32 (CSG1) P-O Front sensor power source Engine switch on (IG), clearance sonar main switch ON 7.2 to 8.8 V
      L91-32(CSG1)-L90-4 (GND1) O-W-B Ground Always Below 1 Ω
      L91-33(LIN1)-L91-32 (CSG1) L-O Front sensor signal Engine switch on (IG), clearance sonar main switch OFF --> ON Waveform 1
    5. Using an oscilloscope, check waveform 1.
      Fig 5: Identifying Waveform 1
      G04951830Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Waveform 1 (Reference) 

      WAVEFORM 1 REFERENCE

      Item Content
      Terminal No. (Symbols)
      • CH1:L91-33(LIN1)-L91-32 (CSG1)
      • CH2: L90-28 (LIN3) - L90-27 (CSG3)
      • CH3:L91-30(LIN2)-L91-29 (CSG2)
      Tool Setting 2 V/DIV., 1 msec./DIV.
      Condition Engine switch on (IG), clearance sonar main switch ON
    6. Using an oscilloscope, check waveform 2.
      Fig 6: Identifying Waveform 2
      G04951828Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Waveform 2 (Reference) 

      WAVEFORM 2 REFERENCE

      Item Content
      Terminal No. (Symbols)
      • L91-9(EF)-L90-4(GND1)
      • L91-26(CBZ)-L90-4(GND1)
      • L91-27(EE)-L90-4(GND1)
      Tool Setting 5 V/DIV., 1 msec/DIV.
      Condition Engine switch on (IG), shift lever in R position
      NOTE:
      • The waveforms of CBZ and EE are offset by a half cycle. EF is not synchronized with CBZ and EE.
      • The waveform's amplitude varies depending on the volume setting.
scientia non olet · About LEMON Manuals