Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000002D8A4
Model Year Start: 2024 Model: GR Corolla Prod Date Range: [08/2023 -           ]
Title: PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: TERMINALS OF ECU; 2024 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [08/2023 -        ]

TERMINALS OF ECU

CLEARANCE WARNING ECU ASSEMBLY

(a) Disconnect the I24 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

I24-1 (IG) - I24-31 (E)

IG power source signal

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

I24-31 (E) - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the I24 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

I24-2 (BOF) - I24-31 (E)

Power source for front sensor circuit

Ignition switch off

Below 1 V
  • Ignition switch ON
  • Intuitive parking assist system on

11 to 14 V

I24-3 (E5) - I24-31 (E)

Ground for front clearance sonar

Always

Below 1 Ω

I24-4 (SOF) - I24-31 (E)

Front sensor communication signal (Front clearance sonar sensor)
  • Ignition switch ON
  • Intuitive parking assist system on
  • Shift lever in any position other than P
  • Vehicle speed is less than approximately 10 km/h (6 mph)

Pulse generation

(Refer to waveform 1)

I24-19 (BOR) - I24-31 (E)

Power source for rear sensor circuit

Ignition switch off

Below 1 V
  • Ignition switch ON
  • Intuitive parking assist system on

11 to 14 V

I24-20 (E1) - I24-31 (E)

Ground for rear clearance sonar

Always

Below 1 Ω

I24-21 (SOR) - I24-31 (E)

Rear sensor communication signal (Rear clearance sonar sensor)
  • Ignition switch ON
  • Intuitive parking assist system on
  • Shift lever in R
  • Vehicle speed is less than approximately 10 km/h (6 mph)

Pulse generation

(Refer to waveform 2)

(e) Using an oscilloscope, check waveform 1.

(1) Waveform 1 (Reference)

Item

Content

Measurement terminal

I24-4 (SOF) - I24-31 (E)

Measurement setting

5 V/DIV., 100 μs./DIV.

Condition
  • Ignition switch ON
  • Intuitive parking assist system on
  • Shift lever in any position other than P
  • 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

I24-21 (SOR) - I24-31 (E)

Measurement setting

5 V/DIV., 100 μs./DIV.

Condition
  • Ignition switch ON
  • Intuitive parking assist system on
  • Shift lever in R
  • Vehicle speed is less than approximately 10 km/h (6 mph)