TOYOTA PARKING ASSIST-SENSOR SYSTEM TERMINALS OF ECU


  1. CLEARANCE WARNING ECU

    A01CETME06

    1. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F2-1 (CLSW) - F2-21 (E) R - W-B Clearance sonar main switch signal Clearance sonar main switch off Below 1 V
      Engine switch on (IG), clearance sonar main switch on 11 to 14 V
      F2-6 (SOR) - F2-21 (E) R - W-B Rear sensor communication signal (Rear clearance sonar sensor) Engine switch on (IG), clearance sonar main switch on, shift lever in R

      Pulse generation

      (See waveform 1)
      F2-7 (BOR) - F2-21 (E) Y - W-B Power source for rear sensor circuit Engine switch off Below 1 V
      Engine switch on (IG), clearance sonar main switch on 7.2 to 8.8 V
      F2-8 (SOF) - F2-21 (E) Y - W-B Front sensor communication signal (Front clearance sonar sensor) Engine switch on (IG), clearance sonar main switch on, shift lever in R

      Pulse generation

      (See waveform 1)
      F2-9 (BOF) - F2-21 (E) L - W-B Power source for front sensor circuit Engine switch off Below 1 V
      Engine switch on (IG), clearance sonar main switch on 7.2 to 8.8 V
      F2-10 (IG) - F2-21 (E) L - W-B Power source for clearance warning ECU Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      F2-12 (CBZ) - F2-21 (E) P - W-B Clearance warning buzzer signal Buzzer sounding

      Pulse generation

      (See waveform 2)

    2. Measure the resistance according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F2-21 (E) - Body ground W-B - Body ground Ground Always Below 1 V
      F2-22 (E2) - F2-21 (E) W - W-B Ground for rear clearance sonar sensor Always Below 1 V
      F2-24 (E1) - F2-21 (E) LG - W-B Ground for front clearance sonar sensor Always Below 1 V

    3. Using an oscilloscope, check waveform 1.


      1. A01CAO4E01

        Waveform 1 (Reference)

        Item Content
        Terminal No. (Symbol)

        • CH: 1 F2-8 (SOF) - F2-21 (E)

        • CH: 2 F2-6 (SOR) - F2-21 (E)
        Tool Setting 5 V/DIV., 1 msec./DIV.
        Condition Engine switch on (IG), clearance sonar main switch on, shift lever in R

    4. Using an oscilloscope, check waveform 2.


      1. A01CDTZE01

        Waveform 2 (Reference)

        Item Content
        Terminal No. (Symbol) F2-12 (CBZ) - F2-21 (E)
        Tool Setting 2 V/DIV., 500 μsec./DIV.
        Vehicle Condition When sonar detects obstacle (buzzer sounds)