PARKING ASSIST UNIT INSPECTION

id092200041900

1. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

2. Remove the glove compartment. (See GLOVE COMPARTMENT REMOVAL/INSTALLATION.)

3. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

4. Verify that the voltages of each of the terminals are as indicated in the terminal voltage table (reference).

• If the voltage is not as specified in the terminal voltage table (reference), inspect the parts under Inspection item(s).

― If the system does not operate normally even though the inspection items are normal, replace the parking assist unit. (See PARKING ASSIST UNIT REMOVAL/INSTALLATION.)

Terminal Voltage Table (Reference)

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Terminal

Signal name

Connected to

Test condition

Voltage (V)

Inspection item

A

Rear ultrasonic sensor

Rear ultrasonic sensor (LH)

Wave pattern (See Inspection Using an Oscilloscope (reference).)

•  Parking assist unit (ultrasonic)

―  Terminal B

―  Terminal U

•  Rear ultrasonic sensor (LH)

•  Related wiring harness

B

Rear ultrasonic sensor GND

Rear ultrasonic sensor (LH)

Under any condition

1.0 or less

Parking assist unit (ultrasonic)

―  Terminal Q

C

Rear ultrasonic sensor

Rear ultrasonic sensor (RH)

Wave pattern (See Inspection Using an Oscilloscope (reference).)

•  Parking assist unit (ultrasonic)

―  Terminal D

―  Terminal U

•  Rear ultrasonic sensor (RH)

•  Related wiring harness

D

Rear ultrasonic sensor GND

Rear ultrasonic sensor (RH)

Under any condition

1.0 or less

Parking assist unit (ultrasonic)

―  Terminal Q

E

Rear corner ultrasonic sensor

Rear corner ultrasonic sensor (LH)

Wave pattern (See Inspection Using an Oscilloscope (reference).)

•  Parking assist unit (ultrasonic)

―  Terminal F

―  Terminal U

•  Rear corner ultrasonic sensor (LH)

•  Related wiring harness

F

Rear corner ultrasonic sensor GND

Rear corner ultrasonic sensor (LH), (RH)

Under any condition

1.0 or less

Parking assist unit (ultrasonic)

―  Terminal Q

G

Rear corner ultrasonic sensor

Rear corner ultrasonic sensor (RH)

Wave pattern (See Inspection Using an Oscilloscope (reference).)

•  Parking assist unit (ultrasonic)

―  Terminal F

―  Terminal U

•  Rear corner ultrasonic sensor (RH)

•  Related wiring harness

H

—

—

—

—

—

I^*1

Front corner ultrasonic sensor

Front corner ultrasonic sensor (LH)

Wave pattern (See Inspection Using an Oscilloscope (reference).)

•  Parking assist unit (ultrasonic)

―  Terminal J

―  Terminal U

•  Front corner ultrasonic sensor (LH)

•  Related wiring harness

J^*1

Front ultrasonic sensor GND

Front corner ultrasonic sensor (LH)

Under any condition

1.0 or less

Parking assist unit (ultrasonic)

―  Terminal Q

K^*1

Front ultrasonic sensor

Front ultrasonic sensor (LH)

Wave pattern (See Inspection Using an Oscilloscope (reference).)

•  Parking assist unit (ultrasonic)

―  Terminal L

―  Terminal U

•  Front ultrasonic sensor (LH)

•  Related wiring harness

L^*1

Front ultrasonic sensor GND

Front ultrasonic sensor (LH)

Under any condition

1.0 or less

Parking assist unit (ultrasonic)

―  Terminal Q

M^*1

Front ultrasonic sensor

Front ultrasonic sensor (RH)

Wave pattern (See Inspection Using an Oscilloscope (reference).)

•  Parking assist unit (ultrasonic)

―  Terminal N

―  Terminal U

•  Front ultrasonic sensor (RH)

•  Related wiring harness

N^*1

Front ultrasonic sensor GND

Front ultrasonic sensor (RH)

Under any condition

1.0 or less

Parking assist unit (ultrasonic)

―  Terminal Q

O^*1

Front corner ultrasonic sensor

Front corner ultrasonic sensor (RH)

Wave pattern (See Inspection Using an Oscilloscope (reference).)

•  Parking assist unit (ultrasonic)

―  Terminal P

―  Terminal U

•  Front corner ultrasonic sensor (RH)

•  Related wiring harness

P^*1

Front corner ultrasonic sensor GND

Front corner ultrasonic sensor (RH)

Under any condition

1.0 or less

Parking assist unit (ultrasonic)

―  Terminal Q

Q

GND

Body ground

Under any condition

1.0 or less

•  Body ground

•  Related wiring harness

R

—

—

—

—

—

S

—

—

—

—

—

T

—

—

—

—

—

U

Power supply (IG1)

Ignition relay (IG1_STAB)

Ignition switched ON (engine off or on)

B+

•  IG1 relay

•  Start stop unit

―  Terminal 2S

•  METER2 7.5 A fuse

•  DC-DC converter

―  Terminal K

•  Ignition relay (IG1_STAB)

•  Related wiring harness

Ignition switched off or ACC

1.0 or less

V

Parking sensor switch

Parking sensor switch

Ignition switched ON (engine off or on)

Parking sensor switch ON

1.0 or less

•  Parking assist unit (ultrasonic)

―  Terminal U

•  Cluster switch

•  Related wiring harnesses

Parking sensor switch OFF

B+

W

Rear parking sensor buzzer

Rear parking sensor buzzer

Ignition switched ON (engine off or on)

B+

•  Parking assist unit (ultrasonic)

―  Terminal U

―  Terminal X

•  Rear parking sensor buzzer

•  Related wiring harness

Ignition switched off

1.0 or less

X

Rear parking sensor buzzer GND

Rear parking sensor buzzer

Ignition switched ON (engine off or on) and parking sensor switch ON

Buzzer sounding

1.0 or less

•  Parking assist unit (ultrasonic)

―  Terminal Q

―  Terminal U

•  Rear parking sensor buzzer

•  Related wiring harness

Buzzer stopped

B+

Y^*2

Front parking sensor buzzer

Front parking sensor buzzer

Ignition switched ON (engine off or on)

B+

•  Parking assist unit (ultrasonic)

―  Terminal Z

―  Terminal U

•  Front parking sensor buzzer

•  Related wiring harness

Ignition switched off or ACC

1.0 or less

Z^*2

Front parking sensor buzzer GND

Front parking sensor buzzer

Ignition switched ON (engine off or on) and parking sensor switch ON

Buzzer sounding

1.0 or less

•  Parking assist unit (ultrasonic)

―  Terminal Y

―  Terminal Q

•  Front parking sensor buzzer

•  Related wiring harness

Buzzer stopped

B+

AA

CAN_H

CAN system related module

Terminal used for communication therefore determination based on terminal voltage is not possible.

AB

CAN_L

CAN system related module

Terminal used for communication therefore determination based on terminal voltage is not possible.

Terminal	Signal name	Connected to	Test condition	Voltage (V)	Inspection item
A	Rear ultrasonic sensor	Rear ultrasonic sensor (LH)	Wave pattern (See Inspection Using an Oscilloscope (reference).)	• Parking assist unit (ultrasonic) ― Terminal B ― Terminal U • Rear ultrasonic sensor (LH) • Related wiring harness
B	Rear ultrasonic sensor GND	Rear ultrasonic sensor (LH)	Under any condition	1.0 or less	Parking assist unit (ultrasonic) ― Terminal Q
C	Rear ultrasonic sensor	Rear ultrasonic sensor (RH)	Wave pattern (See Inspection Using an Oscilloscope (reference).)	• Parking assist unit (ultrasonic) ― Terminal D ― Terminal U • Rear ultrasonic sensor (RH) • Related wiring harness
D	Rear ultrasonic sensor GND	Rear ultrasonic sensor (RH)	Under any condition	1.0 or less	Parking assist unit (ultrasonic) ― Terminal Q
E	Rear corner ultrasonic sensor	Rear corner ultrasonic sensor (LH)	Wave pattern (See Inspection Using an Oscilloscope (reference).)	• Parking assist unit (ultrasonic) ― Terminal F ― Terminal U • Rear corner ultrasonic sensor (LH) • Related wiring harness
F	Rear corner ultrasonic sensor GND	Rear corner ultrasonic sensor (LH), (RH)	Under any condition	1.0 or less	Parking assist unit (ultrasonic) ― Terminal Q
G	Rear corner ultrasonic sensor	Rear corner ultrasonic sensor (RH)	Wave pattern (See Inspection Using an Oscilloscope (reference).)	• Parking assist unit (ultrasonic) ― Terminal F ― Terminal U • Rear corner ultrasonic sensor (RH) • Related wiring harness
H	—	—	—	—	—
I^*1	Front corner ultrasonic sensor	Front corner ultrasonic sensor (LH)	Wave pattern (See Inspection Using an Oscilloscope (reference).)	• Parking assist unit (ultrasonic) ― Terminal J ― Terminal U • Front corner ultrasonic sensor (LH) • Related wiring harness
J^*1	Front ultrasonic sensor GND	Front corner ultrasonic sensor (LH)	Under any condition	1.0 or less	Parking assist unit (ultrasonic) ― Terminal Q
K^*1	Front ultrasonic sensor	Front ultrasonic sensor (LH)	Wave pattern (See Inspection Using an Oscilloscope (reference).)	• Parking assist unit (ultrasonic) ― Terminal L ― Terminal U • Front ultrasonic sensor (LH) • Related wiring harness
L^*1	Front ultrasonic sensor GND	Front ultrasonic sensor (LH)	Under any condition	1.0 or less	Parking assist unit (ultrasonic) ― Terminal Q
M^*1	Front ultrasonic sensor	Front ultrasonic sensor (RH)	Wave pattern (See Inspection Using an Oscilloscope (reference).)	• Parking assist unit (ultrasonic) ― Terminal N ― Terminal U • Front ultrasonic sensor (RH) • Related wiring harness
N^*1	Front ultrasonic sensor GND	Front ultrasonic sensor (RH)	Under any condition	1.0 or less	Parking assist unit (ultrasonic) ― Terminal Q
O^*1	Front corner ultrasonic sensor	Front corner ultrasonic sensor (RH)	Wave pattern (See Inspection Using an Oscilloscope (reference).)	• Parking assist unit (ultrasonic) ― Terminal P ― Terminal U • Front corner ultrasonic sensor (RH) • Related wiring harness
P^*1	Front corner ultrasonic sensor GND	Front corner ultrasonic sensor (RH)	Under any condition	1.0 or less	Parking assist unit (ultrasonic) ― Terminal Q
Q	GND	Body ground	Under any condition	1.0 or less	• Body ground • Related wiring harness
R	—	—	—	—	—
S	—	—	—	—	—
T	—	—	—	—	—
U	Power supply (IG1)	Ignition relay (IG1_STAB)	Ignition switched ON (engine off or on)	B+	• IG1 relay • Start stop unit ― Terminal 2S • METER2 7.5 A fuse • DC-DC converter ― Terminal K • Ignition relay (IG1_STAB) • Related wiring harness
Ignition switched off or ACC	1.0 or less
V	Parking sensor switch	Parking sensor switch	Ignition switched ON (engine off or on)	Parking sensor switch ON	1.0 or less	• Parking assist unit (ultrasonic) ― Terminal U • Cluster switch • Related wiring harnesses
Parking sensor switch OFF	B+
W	Rear parking sensor buzzer	Rear parking sensor buzzer	Ignition switched ON (engine off or on)	B+	• Parking assist unit (ultrasonic) ― Terminal U ― Terminal X • Rear parking sensor buzzer • Related wiring harness
Ignition switched off	1.0 or less
X	Rear parking sensor buzzer GND	Rear parking sensor buzzer	Ignition switched ON (engine off or on) and parking sensor switch ON	Buzzer sounding	1.0 or less	• Parking assist unit (ultrasonic) ― Terminal Q ― Terminal U • Rear parking sensor buzzer • Related wiring harness
Buzzer stopped	B+
Y^*2	Front parking sensor buzzer	Front parking sensor buzzer	Ignition switched ON (engine off or on)	B+	• Parking assist unit (ultrasonic) ― Terminal Z ― Terminal U • Front parking sensor buzzer • Related wiring harness
Ignition switched off or ACC	1.0 or less
Z^*2	Front parking sensor buzzer GND	Front parking sensor buzzer	Ignition switched ON (engine off or on) and parking sensor switch ON	Buzzer sounding	1.0 or less	• Parking assist unit (ultrasonic) ― Terminal Y ― Terminal Q • Front parking sensor buzzer • Related wiring harness
Buzzer stopped	B+
AA	CAN_H	CAN system related module	Terminal used for communication therefore determination based on terminal voltage is not possible.
AB	CAN_L	CAN system related module	Terminal used for communication therefore determination based on terminal voltage is not possible.

*1 :With front ultrasonic sensor

*2 :With front parking sensor buzzer

Inspection Using an Oscilloscope (reference)

—: Does not operate

Oscilloscope setting:			Terminal
Ignition	Shift lever position	Vehicle speed	Front corner ultrasonic sensor (LH)	Front ultrasonic sensor (LH)	Front ultrasonic sensor (RH)	Front corner ultrasonic sensor (RH)	Rear corner ultrasonic sensor (LH)	Rear ultrasonic sensor (LH)	Rear ultrasonic sensor (RH)	Rear corner ultrasonic sensor (RH)
ON (engine off or on)	Except R position	10—15 km/h {6.3—9.3 mph} or less	I—J	K—L	M—N	O—P	—	—	—	—
ON (engine off or on)	R position	10—15 km/h {6.3—9.3 mph} or less	I—J	—	—	O—P	E—F	A—B	C—D	G—F

• Oscilloscope setting:

― 2 V/DIV (Y), 20 ms/DIV (X), DC range

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