TOYOTA PARKING ASSIST-SENSOR SYSTEM TERMINALS OF ECU


  1. CLEARANCE WARNING ECU ASSEMBLY

    A001PHYN01

    1. Disconnect the F38 clearance warning ECU assembly connector.

    2. Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F38-8 (IG) - F38-1 (E) BE - W-B IG power source signal Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      F38-1 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the F38 clearance warning ECU assembly connector.

    4. Measure the voltage and check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F34-11 (E1) - F38-1 (E) P - W-B Ground for rear sensor circuit Always Below 1 V
      F34-5 (S3) - F38-1 (E) G - W-B Sensor communication signal (rear center RH) Power switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R Pulse generation
      F34-3 (S1) - F38-1 (E) L - W-B Sensor communication signal (rear corner RH) Power switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R Pulse generation
      F34-8 (BOR) - F38-1 (E) Y - W-B Power source for rear sensor circuit Power switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R 7.5 to 14 V
      F38-7 (ER) - F38-1 (E) B - W-B Ground for No. 2 clearance warning buzzer Buzzer not sounding Below 1 V
      F37-4 (EF) - F38-1 (E) P - W-B Ground for No. 1 clearance warning buzzer Buzzer not sounding Below 1 V
      F37-9 (S9) - F38-1 (E) V - W-B Sensor communication signal (front side RH) Power switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R Pulse generation
      F37-12 (S7) - F38-1 (E) R - W-B Sensor communication signal (front center RH) Power switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R Pulse generation
      F37-11 (S5) - F38-1 (E) SB - W-B Sensor communication signal (front corner RH) Power switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R Pulse generation
      F37-3 (CBZ) - F38-1 (E) SB - W-B No. 1 clearance warning buzzer signal Buzzer sounding Pulse generation
      F38-15 (BBZ) - F38-1 (E) L - W-B No. 2 clearance warning buzzer signal Buzzer sounding Pulse generation
      F34-4 (S4) - F38-1 (E) LG - W-B Sensor communication signal (rear center LH) Power switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R Pulse generation
      F34-2 (S2) - F38-1 (E) V - W-B Sensor communication signal (rear corner LH) Power switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R Pulse generation
      F37-5 (BOF) - F38-1 (E) LG - W-B Power source for front sensor circuit Power switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R 7.5 to 14 V
      F37-10 (S10) - F38-1 (E) G - W-B Sensor communication signal (front side LH) Power switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R Pulse generation
      F37-1 (S8) - F38-1 (E) W - W-B Sensor communication signal (front center LH) Power switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R Pulse generation
      F37-2 (S6) - F38-1 (E) G - W-B Sensor communication signal (front corner LH) Power switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R Pulse generation
      F37-6 (E5) - F38-1 (E) GR - W-B Ground for front sensor circuit Always Below 1 V
      F34-1 (S11) - F38-1 (E) R - W-B Sensor communication signal (rear side RH) Power switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R Pulse generation
      F34-9 (S12) - F38-1 (E) B - W-B Sensor communication signal (rear side LH) Power switch on (IG), TOYOTA parking assist-sensor system on, shift lever in R Pulse generation