PARK ASSIST / MONITORING: PARKING SUPPORT BRAKE SYSTEM (for HV Model): TERMINALS OF ECU; 2020 - 2023 MY RAV4 HV [06/2020

Last Modified: 05-08-2025	6.11:8.1.0	Doc ID: RM100000001P7YZ
Model Year Start: 2020	Model: RAV4 HV	Prod Date Range: [06/2020 - 10/2023]
Title: PARK ASSIST / MONITORING: PARKING SUPPORT BRAKE SYSTEM (for HV Model): TERMINALS OF ECU; 2020 - 2023 MY RAV4 HV [06/2020 - 10/2023]

TERMINALS OF ECU

CLEARANCE WARNING ECU ASSEMBLY

for TMMC Made

for TMC Made

(a) Disconnect the G25*1 or H4*2 clearance warning ECU assembly connector.

*1: for TMMC Made
*2: for TMC Made

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

for TMMC Made:

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
G25-1 (IG) - G25-28 (E)	B - W-B	IG power source signal	Power switch off	Below 1 V
G25-1 (IG) - G25-28 (E)	B - W-B	IG power source signal	Power switch on (IG)	11 to 14 V
G25-28 (E) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

for TMC Made:

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
H4-1 (IG) - H4-28 (E)	B - W-B	IG power source signal	Power switch off	Below 1 V
H4-1 (IG) - H4-28 (E)	B - W-B	IG power source signal	Power switch on (IG)	11 to 14 V
H4-28 (E) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

*1: for TMMC Made
*2: for TMC Made

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

for TMMC Made:

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
G25-2 (BOF) - G25-28 (E)	R - W-B	Power source for front sensor circuit	Power switch on (IG) Parking support brake system on	11 to 14 V
G25-3 (SOF) - G25-28 (E)	L - W-B	Front sensor communication signal (Front clearance sonar sensor)	Power switch on (IG) Parking support brake 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)
G25-4 (E5) - G25-28 (E)	W - W-B	Ground for front clearance sonar	Always	Below 1 Ω
G25-9 (CBZ) - G25-8 (EF)	LG - L	No. 1 clearance warning buzzer signal	Buzzer sounding	Pulse generation (Refer to waveform 2)
G25-19 (BOR) - G25-28 (E)	LG - W-B	Power source for rear sensor circuit	Power switch on (IG) Parking support brake system on	11 to 14 V
G25-20 (SOR) - G25-28 (E)	SB - W-B	Rear sensor communication signal (Rear clearance sonar sensor)	Power switch on (IG) Parking support brake system on Shift lever in R	Pulse generation (Refer to waveform 3)
G25-21 (E1) - G25-28 (E)	GR - W-B	Ground for rear clearance sonar	Always	Below 1 Ω
G25-25 (BBZ) - G25-26 (ER)	LG - L	No. 2 clearance warning buzzer signal	Buzzer sounding	Pulse generation (Refer to waveform 2)

for TMC Made:

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
H4-2 (BOF) - H4-28 (E)	R - W-B	Power source for front sensor circuit	Power switch on (IG) Parking support brake system on	11 to 14 V
H4-3 (SOF) - H4-28 (E)	L - W-B	Front sensor communication signal (Front clearance sonar sensor)	Power switch on (IG) Parking support brake 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)
H4-4 (E5) - H4-28 (E)	W - W-B	Ground for front clearance sonar	Always	Below 1 Ω
H4-9 (CBZ) - H4-8 (EF)	LG - L	No. 1 clearance warning buzzer signal	Buzzer sounding	Pulse generation (Refer to waveform 2)
H4-19 (BOR) - H4-28 (E)	LG - W-B	Power source for rear sensor circuit	Power switch on (IG) Parking support brake system on	11 to 14 V
H4-20 (SOR) - H4-28 (E)	SB - W-B	Rear sensor communication signal (Rear clearance sonar sensor)	Power switch on (IG) Parking support brake system on Shift lever in R	Pulse generation (Refer to waveform 3)
H4-21 (E1) - H4-28 (E)	GR - W-B	Ground for rear clearance sonar	Always	Below 1 Ω
H4-25 (BBZ) - H4-26 (ER)	LG - L	No. 2 clearance warning buzzer signal	Buzzer sounding	Pulse generation (Refer to waveform 2)

(e) Using an oscilloscope, check waveform 1.

(1) Waveform 1 (Reference)

Item

Content

Measurement terminal

G25-3 (SOF) - G25-28 (E)*1

H4-3 (SOF) - H4-28 (E)*2

Measurement setting

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

Condition

Power switch on (IG)
Parking support brake system on
Shift lever in any position other than P
Vehicle speed is less than approximately 10 km/h (6 mph)

*1: for TMMC Made
*2: for TMC Made

(f) Using an oscilloscope, check waveform 2.

(1) Waveform 2 (Reference)

Item

Content

Measurement terminal

G25-9 (CBZ) - G25-8 (EF)*1

H4-9 (CBZ) - H4-8 (EF)*2

G25-25 (BBZ) - G25-26 (ER)*1

H4-25 (BBZ) - H4-26 (ER)*2

Measurement setting

2 V/DIV., 500 μs./DIV.

Condition

Buzzer sounding

*1: for TMMC Made
*2: for TMC Made

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

G25-20 (SOR) - G25-28 (E)*1

H4-20 (SOR) - H4-28 (E)*2

Measurement setting

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

Condition

Power switch on (IG)
Parking support brake system on
Shift lever in R

*1: for TMMC Made
*2: for TMC Made

HYBRID VEHICLE CONTROL ECU ASSEMBLY

for Nickel Metal Hydride Battery:

Click here

for Lithium-ion Battery:

Click here

COMBINATION METER ASSEMBLY

Click here

BLIND SPOT MONITOR SENSOR RH (A)

Click here

BLIND SPOT MONITOR SENSOR LH (B)

Click here