Terminals Of Ecu [08/2023 - 09/2024]
WARNING: This page is about a different car, the 2025 Toyota GR Corolla, 2025 Toyota Corolla, 2024 Toyota GR Corolla, and 2024 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
- CLEARANCE WARNING ECU ASSEMBLY
- Disconnect the I24 clearance warning ECU assembly connector.
- 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 - Reconnect the I24 clearance warning ECU assembly connector.
- 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
- Parking brake released
- 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) - Using an oscilloscope, check waveform 1.
- Using an oscilloscope, check waveform 2.