TOYOTA PARKING ASSIST-SENSOR SYSTEM(for 8 Sensor Type) TERMINALS OF ECU


  1. CHECK CLEARANCE WARNING ECU ASSEMBLY

    A01QSI5N04

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G166-22 (BOR) - G166-30 (E) R - W-B Power source for rear sensor circuit Ignition switch off Below 1.5 V
      Ignition switch to ON, TOYOTA parking assist-sensor system on 7.2 to 8.8 V
      G166-8 (SOF) - G166-30 (E) G - W-B Front sensor communication signal (Front clearance sonar sensor) Ignition switch to ON, TOYOTA parking assist-sensor system on, shift lever in R

      Pulse generation

      (See waveform 2)
      G166-14 (CBZ) - G166-30 (E) LG - W-B Clearance warning buzzer signal Ignition switch off Below 1.5 V
      Ignition switch to ON, TOYOTA parking assist-sensor system on 11 to 14 V
      G166-13 (EF) - G166-30 (E) GR - W-B Ground for clearance warning buzzer When sonar detects obstacle (Buzzer sounds)

      Pulse generation

      (See waveform 1)
      G166-1 (IG) - G166-30 (E) B - W-B IG power source signal Ignition switch off Below 1.5 V
      Ignition switch to ON 11 to 14 V
      G166-30 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G166-23 (E1) - G166-30 (E) W - W-B Ground for rear clearance sonar Always Below 1 Ω
      G166-6 (E5) - G166-30 (E) P - W-B Ground for front clearance sonar Always Below 1 Ω
      G166-4 (BOF) - G166-30 (E) V - W-B Power source for front sensor circuit Ignition switch off Below 1.5 V
      Ignition switch to ON, TOYOTA parking assist-sensor system on 7.2 to 8.8 V
      G166-27 (RL) - Body ground L - Body ground Reverse signal Ignition switch to ON, shift lever in R 11 to 14 V
      Ignition switch to ON, shift lever in not R Below 1 V
      G166-24 (SOR) - G166-30 (E) P - W-B Rear sensor communication signal (Rear clearance sonar sensor) Ignition switch to ON, TOYOTA parking assist-sensor system on, shift lever in R

      Pulse generation

      (See waveform 2)
    2. A01QRNSE01

      Using an oscilloscope, check waveform 1.

      Measurement Condition
      Item Content
      Terminal No. (Symbol) G166-13 (EF) - G166-30 (E)
      Tool Setting 2 V/DIV., 500 μsec./DIV.
      Vehicle Condition When sonar detects obstacle (Buzzer sounds)
    3. A01QTPPE02

      Using an oscilloscope, check waveform 2.

      Measurement Condition
      Item Content
      Terminal No. (Symbol)

      • CH: 1 G166-8 (SOF) - G166-30 (E)

      • CH: 2 G166-24 (SOR) - G166-30 (E)
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition Ignition switch to ON, TOYOTA parking assist-sensor system on, shift lever in R