RM3660EC _56 Audio / Visual / Telematics _080754 PARK ASSIST / MONITORING _0470654 PARKING SUPPORT BRAKE SYSTEM U

PARK ASSIST / MONITORING PARKING SUPPORT BRAKE SYSTEM TERMINALS OF ECU

CLEARANCE WARNING ECU ASSEMBLY

3.375,0.219 3.74,0.458 0.365,0.24 3.448,0.25 3.906,0.448 0.458,0.198 10 false I24

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 source signal	Ignition switch off	Below 1 V
I24-1 (IG) - I24-31 (E)	IG source signal	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
I24-2 (BOF) - I24-31 (E)	Power source for front sensor circuit	· Ignition switch ON · Parking support brake 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 · 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)
I24-19 (BOR) - I24-31 (E)	Power source for rear sensor circuit	Ignition switch off	Below 1 V
I24-19 (BOR) - I24-31 (E)	Power source for rear sensor circuit	· Ignition switch ON · Parking support brake 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 · 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 2)

Using an oscilloscope, check waveform 1.

0.177,0.99 0.635,1.188 0.458,0.198 10 false GND

Waveform 1 (Reference)

Item	Content
Measurement terminal	I24-4 (SOF) - I24-31 (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)

Using an oscilloscope, check waveform 2.

0.177,0.99 0.635,1.188 0.458,0.198 10 false GND

Waveform 2 (Reference)

Item	Content
Measurement terminal	I24-21 (SOR) - I24-31 (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)