TOYOTA PARKING ASSIST-SENSOR SYSTEM (w/ Multi-display) TERMINALS OF ECU


  1. CHECK CLEARANCE WARNING ECU

    A01DND9E23
    Text in Illustration
    *A for 4 Sensor Type *B for 8 Sensor Type

    1. Measure the voltage and resistance and check for pulse signals according to the value(s) in the table below.

      for 4 Sensor Type
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I1-7 (BOR) - I1-17 (E) P - W-B Power source for rear sensor circuit Engine switch off Below 1.5 V
      Engine switch on (IG), TOYOTA parking assist-sensor system on 7.2 to 8.8 V
      I1-10 (BBZ) - I1-17 (E) GR - W-B Clearance warning buzzer signal Engine switch off Below 1.5 V
      Engine switch on (IG), TOYOTA parking assist-sensor system on 11 to 14 V
      I1-11 (EF) - I1-17 (E) LG - W-B Ground for clearance warning buzzer When sonar detects obstacle (Buzzer sounds)

      Pulse generation

      (See waveform 1)
      I1-12 (CSSW) - I1-17 (E) V - W-B Clearance sonar main switch signal Engine switch on (IG), clearance sonar main switch on 11 to 14 V
      Engine switch on (IG), clearance sonar main switch off Below 1 V
      I1-15 (IG) - I1-17 (E) L - W-B IG power source signal Engine switch off Below 1.5 V
      Engine switch on (IG) 11 to 14 V
      I1-17 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      I1-18 (E2) - I1-17 (E) R - W-B Ground for rear sensors Always Below 1 Ω
      I1-24 (SOR) - I1-17 (E) W - W-B Rear sensor communication signal Engine switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R

      Pulse generation

      (See waveform 2)
      for 8 Sensor Type
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G154-7 (BOR) - G154-17 (E) P - W-B Power source for rear sensor circuit Engine switch off Below 1.5 V
      Engine switch on (IG), TOYOTA parking assist-sensor system on 7.2 to 8.8 V
      G154-9 (SOF) - G154-17 (E) R - W-B Front sensor communication signal Engine switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R

      Pulse generation

      (See waveform 2)
      G154-10 (BBZ) - G154-17 (E) GR - W-B Clearance warning buzzer signal Engine switch off Below 1.5 V
      Engine switch on (IG), TOYOTA parking assist-sensor system on 11 to 14 V
      G154-11 (EF) - G154-17 (E) LG - W-B Ground for clearance warning buzzer When sonar detects obstacle (Buzzer sounds)

      Pulse generation

      (See waveform 1)
      G154-12 (CSSW) - G154-17 (E) V - W-B Clearance sonar main switch signal Engine switch on (IG), clearance sonar main switch on 11 to 14 V
      Engine switch on (IG), clearance sonar main switch off Below 1 V
      G154-15 (IG) - G154-17 (E) L - W-B IG power source signal Engine switch off Below 1.5 V
      Engine switch on (IG) 11 to 14 V
      G154-17 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G154-18 (E2) - G154-17 (E) R - W-B Ground for rear sensors Always Below 1 Ω
      G154-19 (E1) - G154-17 (E) G - W-B Ground for front sensors Always Below 1 Ω
      G154-21 (BOF) - G154-17 (E) V - W-B Power source for front sensor circuit Engine switch off Below 1.5 V
      Engine switch on (IG), TOYOTA parking assist-sensor system on 7.2 to 8.8 V
      G154-24 (SOR) - G154-17 (E) W - W-B Rear sensor communication signal Engine switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R

      Pulse generation

      (See waveform 2)
    2. A01DSDDE01

      Using an oscilloscope, check waveform 1.

      Measurement Condition
      Item Content
      Terminal No. (Symbol)

      • I1-11 (EF) - I1-17 (E)*1

      • G154-11 (EF) - G154-17 (E)*2
      Tool Setting 2 V/DIV., 500 μsec./DIV.
      Condition When sonar detects obstacle (Buzzer sounds)

      • *1: for 4 Sensor Type

      • *2: for 8 Sensor Type

    3. A01DU5FE01

      Using an oscilloscope, check waveform 2.

      Measurement Condition
      Item Content
      Terminal No. (Symbol)

      • CH1: G154-9 (SOF) - G154-17 (E)

      • CH2: I1-24 (SOR) - I1-17 (E)*1

      • CH2: G154-24 (SOR) - G154-17 (E)*2
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition Engine switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R

      • *1: for 4 Sensor Type

      • *2: for 8 Sensor Type

  2. CHECK DRIVING SUPPORT SWITCH CONTROL ECU (for 8 Sensor Type)


    1. for Automatic Transmission:

      A01DO7JE05

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

        Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
        G163-5 (SWI1) - G163-14 (SWI2) SB - P Steering pad switch assembly input signal (Menu, ENTER, Up, or Down switch) Engine switch on (IG), Menu switch pressed 0 V
        Engine switch on (IG), ENTER switch pressed 0.9 V
        Engine switch on (IG), Up switch pressed 3.4 V
        Engine switch on (IG), Down switch pressed 2.0 V
        Engine switch on (IG), Menu, ENTER, Up, or Down switch not pressed 4.9 V
        G163-14 (SWI2) - Body ground P - Body ground Steering pad switch assembly input signal (Menu, ENTER, Up, or Down switch) Always Below 1 V
        G162-9 (SWO1) - Body ground V - Body ground Steering pad switch assembly output signal (Menu, ENTER, Up, or Down switch) Engine switch on (IG), Menu, ENTER, Up, or Down switch pressed to turn TOYOTA parking assist-sensor system on 11 to 14 V
        Engine switch on (IG), Menu, ENTER, Up, or Down switch not pressed Below 1 V

    2. for Manual Transmission:

      A01DPVJE08

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

        Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
        G76-3 (SWI1) - G76-4 (SWI2) SB - P Steering pad switch assembly input signal (Menu, ENTER, Up, or Down switch) Engine switch on (IG), Menu switch pressed 0 V
        Engine switch on (IG), ENTER switch pressed 0.9 V
        Engine switch on (IG), Up switch pressed 3.4 V
        Engine switch on (IG), Down switch pressed 2.0 V
        Engine switch on (IG), Menu, ENTER, Up, or Down switch not pressed 4.9 V
        G76-4 (SWI2) - Body ground P - Body ground Steering pad switch assembly input signal (Menu, ENTER, Up, or Down switch) Always Below 1 V
        G76-12 (SWO1) - Body ground V - Body ground Steering pad switch assembly output signal (Menu, ENTER, Up, or Down switch) Engine switch on (IG), Menu, ENTER, Up, or Down switch pressed to turn TOYOTA parking assist-sensor system on 11 to 14 V
        Engine switch on (IG), Menu, ENTER, Up, or Down switch not pressed Below 1 V