TOYOTA PARKING ASSIST-SENSOR SYSTEM TERMINALS OF ECU


  1. CHECK CLEARANCE WARNING ECU

    A004RQIE02

    1. Disconnect the D65 clearance warning ECU connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D65-9 (CLSW) - D65-24 (E) P - W-B Back sonar or clearance sonar switch power source signal Ignition switch ON, back sonar or clearance sonar switch on 11 to 14 V
      D65-9 (CLSW) - D65-24 (E) P - W-B Back sonar or clearance sonar switch power source signal Ignition switch ON, back sonar or clearance sonar switch off Below 1 V
      D65-24 (E) - Body ground W-B - Body ground ECU ground Always Below 1 Ω

    3. Reconnect the D65 ECU connector.

    4. Measure the voltage and waveform according to value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D65-6 (BBZ) - D65-11 (E2) B - BR No. 1 clearance warning buzzer signal Buzzer not sounding Below 1 V
      D65-6 (BBZ) - D65-11 (E2) B - BR No. 1 clearance warning buzzer signal Buzzer sounding Waveform 1
      D65-8 (RL) - D65-24 (E) R - W-B Reverse signal Ignition switch ON, shift lever in R 11 to 14 V
      Ignition switch ON, shift lever not in R Below 1 V
      D65-12 (BOR) - D65-11 (E2) L - BR Rear ultrasonic sensor circuit power source Ignition switch ON, back sonar or clearance sonar switch on 7.5 to 14.0 V
      D65-12 (BOR) - D65-11 (E2) L - BR Rear ultrasonic sensor circuit power source Ignition switch off Below 1 V
      D65-2 (S1) - D65-11 (E2) B - BR Rear ultrasonic sensor circuit power source Ignition switch ON, back sonar or clearance sonar switch on Waveform 2
      D65-3 (S4) - D65-11 (E2) V - BR Rear ultrasonic sensor circuit power source Ignition switch ON, back sonar or clearance sonar switch on Waveform 2
      D65-4 (S2) - D65-11 (E2) W - BR Rear ultrasonic sensor circuit power source Ignition switch ON, back sonar or clearance sonar switch on Waveform 2
      D65-5 (S3) - D65-11 (E2) R - BR Rear ultrasonic sensor circuit power source Ignition switch ON, back sonar or clearance sonar switch on Waveform 2
    5. A004RW3E01

      Using an oscilloscope, check waveform 1.

      Waveform 1
      Item Content
      Terminal No. (Symbol) D65-6 (BBZ) - D65-11 (E2)
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition Buzzer sounding
    6. A004SVDE06

      Using an oscilloscope, check waveform 2.

      Waveform 2
      Item Content
      Terminal No. (Symbol)

      • D65-2 (S1) - D65-11 (E2)

      • D65-3 (S4) - D65-11 (E2)

      • D65-4 (S2) - D65-11 (E2)

      • D65-5 (S3) - D65-11 (E2)
      Tool Setting 2 V/DIV., 1 msec./DIV.
      Condition Ignition switch ON, back sonar or clearance sonar switch on