Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001RIGA
Model Year Start: 2021 Model: Camry Prod Date Range: [10/2020 -           ]
Title: PARK ASSIST / MONITORING: PARKING SUPPORT BRAKE SYSTEM: TERMINALS OF ECU; 2021 - 2024 MY Camry [10/2020 -        ]

TERMINALS OF ECU

CLEARANCE WARNING ECU ASSEMBLY

(a) Disconnect the R39 clearance warning ECU assembly connector.

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

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

R39-1 (IG) - R39-31 (E)

IG source signal

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

R39-31 (E) - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the R39 clearance warning ECU assembly connector.

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

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

R39-2 (BOF) - R39-31 (E)

Power source for front sensor circuit

Ignition switch off

Below 1 V

  • Ignition switch ON
  • Parking support brake system on

11 to 14 V

R39-3 (E5) - R39-31 (E)

Ground for front clearance sonar

Always

Below 1 Ω

R39-4 (SOF) - R39-31 (E)

Front sensor communication signal (Front clearance sonar sensor)

  • Ignition switch ON
  • Parking support brake system on
  • Shift lever in any position other than P or R
  • Vehicle speed is less than approximately 10 km/h (6 mph)

Pulse generation

(Refer to waveform 1)

R39-9 (CBZ) - R39-8 (EF)

No. 1 clearance warning buzzer signal

Buzzer sounding

Pulse generation

(Refer to waveform 2)

R39-19 (BOR) - R39-31 (E)

Power source for rear sensor circuit

Ignition switch off

Below 1 V

  • Ignition switch ON
  • Parking support brake system on

11 to 14 V

R39-20 (E1) - R39-31 (E)

Ground for rear clearance sonar

Always

Below 1 Ω

R39-21 (SOR) - R39-31 (E)

Rear sensor communication signal (Rear clearance sonar sensor)

  • Ignition switch ON
  • Parking support brake system on
  • Shift lever in R
  • Vehicle speed is less than approximately 10 km/h (6 mph)

Pulse generation

(Refer to waveform 3)

(e) Using an oscilloscope, check waveform 1.

(1) Waveform 1 (Reference)

Item

Content

Measurement terminal

R39-4 (SOF) - R39-31 (E)

Measurement setting

5 V/DIV., 1 ms./DIV.

Condition

  • Ignition switch ON
  • Parking support brake system on
  • Shift lever in any position other than P or R
  • Vehicle speed is less than approximately 10 km/h (6 mph)

(f) Using an oscilloscope, check waveform 2.

(1) Waveform 2 (Reference)

Item

Content

Measurement terminal

R39-9 (CBZ) - R39-8 (EF)

Measurement setting

2 V/DIV., 500 μs./DIV.

Condition

Buzzer sounding

HINT:

The amplitude of the waveform changes according to the set volume.

(g) Using an oscilloscope, check waveform 3.

(1) Waveform 3 (Reference)

Item

Content

Measurement terminal

R39-21 (SOR) - R39-31 (E)

Measurement setting

5 V/DIV., 1 ms./DIV.

Condition

  • Ignition switch ON
  • Parking support brake system on
  • Shift lever in R
  • Vehicle speed is less than approximately 10 km/h (6 mph)

BLIND SPOT MONITOR SENSOR LH (A)

Click here 2018 - 2024 MY Camry [06/2017 -        ]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: TERMINALS OF ECU

BLIND SPOT MONITOR SENSOR RH (B)

Click here 2018 - 2024 MY Camry [06/2017 -        ]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: TERMINALS OF ECU