Toyota 4Runner: Terminals Of Ecu

Toyota 4Runner Service Manual / Audio / Visual / Telematics / Park Assist / Monitoring / Intuitive Parking Assist System / Terminals Of Ecu

TERMINALS OF ECU

1. CHECK CLEARANCE WARNING ECU

(a) Disconnect the F95 clearance warning ECU assembly connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F95-1 (IG) - F95-22 (E)	L - W-B	Back sonar or clearance sonar switch assembly power source signal	Ignition switch ON, back sonar or clearance sonar switch assembly on	11 to 14 V
F95-1 (IG) - F95-22 (E)	L - W-B		Ignition switch ON, back sonar or clearance sonar switch assembly off	Below 1 V
F95-22 (E) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F95-5 (SPD) - F95-22 (E)	SB - W-B	Vehicle speed signal	Ignition switch ON, back sonar or clearance sonar switch on	Alternating between 1.5 to 4.5 V
F95-7 (PL) - F95-22 (E)	L - W-B	Shift position signal	Ignition switch ON, shift lever in P	11 to 14 V
F95-7 (PL) - F95-22 (E)	L - W-B	Shift position signal	Ignition switch ON, shift lever not in P	Below 1 V
F95-9 (L4) - F95-22 (E)	B - W-B	Front ultrasonic sensor indicator signal (Front right sensor)	Clearance warning indicator for front right sensor illuminates	Below 3 V
F95-12 (E6) - F95-22 (E)	W - W-B	Front ultrasonic sensor ground (Front left sensor)	Always	Below 1 Ω
F95-13 (S6) - F95-22 (E)	B - W-B	Front ultrasonic sensor indicator signal (Front left sensor)	Ignition switch ON, back sonar or clearance sonar switch on, sensor detects obstacle	Pulse generation (See waveform 1)
F95-15 (E4) - F95-22 (E)	LG - W-B	Rear ultrasonic sensor ground (Rear center left sensor)	Always	Below 1 Ω
F95-16 (S4) - F95-22 (E)	L - W-B	Rear ultrasonic sensor indicator signal (Rear center left sensor)	Ignition switch ON, back sonar or clearance sonar switch on, shift lever in R	Pulse generation (See waveform 1)
F95-17 (E1) - F95-22 (E)	R - W-B	Rear ultrasonic sensor ground (Rear right sensor)	Always	Below 1 Ω
F95-18 (S1) - F95-22 (E)	W - W-B	Rear ultrasonic sensor indicator signal (Rear right sensor)	Ignition switch ON, back sonar or clearance sonar switch on, shift lever in R	Pulse generation (See waveform 1)
F95-19 (CBZ) - F95-22 (E)	L - W-B	No. 1 clearance warning buzzer signal	Buzzer not sounding	Below 1 V
F95-19 (CBZ) - F95-22 (E)	L - W-B	No. 1 clearance warning buzzer signal	Sonar detecting obstacle (Buzzer sounding)	11 to 14 V
F95-20 (FF) - F95-22 (E)	P - W-B	Clearance warning buzzer signal	Buzzer sounding	Pulse generation (See waveform 1)
F95-23 (RL) - F95-22 (E)	R - W-B	Shift position signal	Ignition switch ON, shift lever in R	11 to 14 V
F95-23 (RL) - F95-22 (E)	R - W-B	Shift position signal	Ignition switch ON, shift lever not in R	Below 1 V
F95-24 (TL) - F95-22 (E)	G - W-B	Illumination signal	Ignition switch ON, light control switch on	11 to 14 V
F95-24 (TL) - F95-22 (E)	G - W-B	Illumination signal	Ignition switch ON, light control switch off	Below 1 V
F95-26 (L5) - F95-22 (E)	P - W-B	Ultrasonic sensor (front left sensor) indicator signal	Clearance warning indicator for front left sensor illuminates	Below 3 V
F95-28 (L1) - F95-22 (E)	Y - W-B	Ultrasonic sensor (rear right sensor) indicator signal	Clearance warning indicator for rear right sensor illuminates	Below 3 V
F95-29 (L2) - F95-22 (E)	GR - W-B	Ultrasonic sensor (rear left sensor) indicator signal	Clearance warning indicator for rear left sensor illuminates	Below 3 V
F95-30 (L3) - F95-22 (E)	SB - W-B	Ultrasonic sensor (rear center right and left sensor) indicator signal	Clearance warning indicator for back sensor illuminates	Below 3 V
F95-31 (L10) - F95-22 (E)	LG - W-B	Clearance warning ECU assembly signal	Clearance warning indicator's operation indicator illuminates	Below 3 V
F95-33 (E5) - F95-22 (E)	G - W-B	Front ultrasonic sensor ground (Front right sensor)	Always	Below 1 Ω
F95-34 (S5) - F95-22 (E)	L - W-B	Front ultrasonic sensor indicator signal (Front right sensor)	Ignition switch ON, back sonar or clearance sonar switch on, sensor detects obstacle	Pulse generation (See waveform 1)
F95-37 (E2) - F95-22 (E)	R - W-B	Rear ultrasonic sensor ground (Rear left sensor)	Always	Below 1 Ω
F95-38 (S2) - F95-22 (E)	G - W-B	Rear ultrasonic sensor communication signal (Rear left sensor)	Ignition switch ON, back sonar or clearance sonar switch on, shift lever in R	Pulse generation (See waveform 1)
F95-39 (E3) - F95-22 (E)	Y - W-B	Rear ultrasonic sensor ground (Rear center right sensor)	Always	Below 1 Ω
F95-40 (S3) - F95-22 (E)	B - W-B	Rear ultrasonic sensor communication signal (Rear center right sensor)	Ignition switch ON, back sonar or clearance sonar switch on, shift lever in R	Pulse generation (See waveform 1)

(e) Using an oscilloscope, check waveform 1.

Measurement Condition

Item	Content
Terminal No. (Symbol)	F95-12 (E6) - F95-13 (S6) F95-15 (E4) - F95-16 (S4) F95-17 (E1) - F95-18 (S1) F95-33 (E5) - F95-34 (S5) F95-37 (E2) - F95-38 (S2) F95-39 (E3) - F95-40 (S3)
Tool Setting	2 V/DIV., 0.1 msec./DIV.
Condition	Ignition switch ON, back sonar or clearance sonar switch on, shift lever in R

Item

Content

Terminal No. (Symbol)

F95-12 (E6) - F95-13 (S6)

F95-15 (E4) - F95-16 (S4)

F95-17 (E1) - F95-18 (S1)

F95-33 (E5) - F95-34 (S5)

F95-37 (E2) - F95-38 (S2)

F95-39 (E3) - F95-40 (S3)

Tool Setting

2 V/DIV., 0.1 msec./DIV.

Condition

Ignition switch ON, back sonar or clearance sonar switch on, shift lever in R

Text in Illustration

*a	Ultrasonic sensor is normal
*b	Open circuit in ultrasonic sensor

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