PARKING ASSIST UNIT INSPECTION

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1.  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].)

2.  Remove the following parts:

(1)  Passenger-side front scuff plate (See FRONT SCUFF PLATE REMOVAL/INSTALLATION.)

(2)  Passenger-side front side trim (See FRONT SIDE TRIM REMOVAL/INSTALLATION.)

(3)  Glove compartment (See GLOVE COMPARTMENT REMOVAL/INSTALLATION.)

(4)  Dashboard under cover (See DASHBOARD UNDER COVER REMOVAL/INSTALLATION.)

(5)  Passenger-side lower panel (See LOWER PANEL REMOVAL/INSTALLATION.)

3.  Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].)

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.

Terminal Voltage Table (Reference)

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Terminal	Signal name	Connected to	Measured item	Test condition		Voltage (V)	Inspection item
A	Rear ultrasonic sensor	Rear ultrasonic sensor (LH)	Wave profile	(See Generated Pulse (reference).)			•  Rear ultrasonic sensor (LH) •  Related wiring harnesses
B	Rear ultrasonic sensor GND	Rear ultrasonic sensor (LH)	Voltage	Under any condition		1.0 or less	•  Rear ultrasonic sensor (LH) •  Related wiring harnesses
C	Rear ultrasonic sensor	Rear ultrasonic sensor (RH)	Wave profile	(See Generated Pulse (reference).)			•  Rear ultrasonic sensor (RH) •  Related wiring harnesses
D	Rear ultrasonic sensor	Rear ultrasonic sensor (RH)	Voltage	Under any condition		1.0 or less	•  Rear ultrasonic sensor (RH) •  Related wiring harnesses
E	Rear corner ultrasonic sensor	Rear corner ultrasonic sensor (LH)	Wave profile	(See Generated Pulse (reference).)			•  Rear corner ultrasonic sensor (LH) •  Related wiring harnesses
F	Rear corner ultrasonic sensor	Rear corner ultrasonic sensor (LH), (RH)	Voltage	Under any condition		1.0 or less	•  Rear corner ultrasonic sensor (LH, RH) •  Related wiring harnesses
G	Rear corner ultrasonic sensor	Rear corner ultrasonic sensor (RH)	Wave profile	(See Generated Pulse (reference).)			•  Rear corner ultrasonic sensor (RH) •  Related wiring harnesses
H	—	—	—	—		—	—
I	Front corner ultrasonic sensor	Front corner ultrasonic sensor (LH)	Wave profile	(See Generated Pulse (reference).)			•  Front corner ultrasonic sensor (LH) •  Related wiring harnesses
J	Front ultrasonic sensor GND	Front corner ultrasonic sensor (LH)	Voltage	Under any condition		1.0 or less	•  Front corner ultrasonic sensor (LH) •  Related wiring harnesses
K	Front ultrasonic sensor	Front ultrasonic sensor (LH)	Wave profile	(See Generated Pulse (reference).)			•  Front ultrasonic sensor (LH) •  Related wiring harnesses
L	Front ultrasonic sensor GND	Front ultrasonic sensor (LH)	Voltage	Under any condition		1.0 or less	•  Front ultrasonic sensor (LH) •  Related wiring harnesses
M	Front ultrasonic sensor	Front ultrasonic sensor (RH)	Wave profile	(See Generated Pulse (reference).)			•  Front ultrasonic sensor (RH) •  Related wiring harnesses
N	Front ultrasonic sensor GND	Front ultrasonic sensor (RH)	Voltage	Under any condition		1.0 or less	•  Front ultrasonic sensor (RH) •  Related wiring harnesses
O	Front ultrasonic sensor	Front corner ultrasonic sensor (RH)	Wave profile	(See Generated Pulse (reference).)			•  Front corner ultrasonic sensor (RH) •  Related wiring harnesses
P	Front ultrasonic sensor GND	Front corner ultrasonic sensor (RH)	Voltage	Under any condition		1.0 or less	•  Front corner ultrasonic sensor (RH) •  Related wiring harnesses
Q	GND	Body ground	Voltage	Under any condition		1.0 or less	Related wiring harnesses
R	—	—	—	—		—	—
S	Indicator	Indicator unit	Voltage	Ignition switched ON (engine off or on)	Parking sensor switch ON (indicator on)	1.0 or less	•  Indicator unit •  Related wiring harnesses
					Parking sensor switch OFF (indicator off)	B+
T	—	—	—	—		—	—
U	IG1	Ignition relay	Voltage	Ignition switched ON (engine off or on)		B+	•  Ignition relay •  METER2 7.5A fuse •  Related wiring harnesses
				Ignition switched off (LOCK)		1.0 or less
V	Parking sensor switch	Indicator unit	Voltage	Ignition switched ON (engine off or on)	Parking sensor switch ON (indicator on)	1.0 or less	•  Indicator unit •  Related wiring harnesses
					Parking sensor switch OFF (indicator off)	B+
W	Rear parking sensor buzzer	Rear parking sensor buzzer	Voltage	Ignition switched ON (engine off or on)		B+	•  Rear parking sensor buzzer •  Related wiring harnesses
				Ignition switched off (LOCK) or ACC		1.0 or less
X	Rear parking sensor buzzer GND	Rear parking sensor buzzer	Voltage	Ignition switched ON (engine off or on) and parking sensor switch ON	Buzzer sounding	1.0 or less	•  Rear parking sensor buzzer •  Related wiring harnesses
					Buzzer stopped	B+
Y	Front parking sensor buzzer	Front parking sensor buzzer	Voltage	Ignition switched ON (engine off or on)		B+	•  Front parking sensor buzzer •  Related wiring harnesses
				Ignition switched off (LOCK) or ACC		1.0 or less
Z	Front parking sensor buzzer GND	Rear parking sensor buzzer	Voltage	Ignition switched ON (engine off or on) and parking sensor switch ON	Buzzer sounding	1.0 or less	•  Front parking sensor buzzer •  Related wiring harnesses
					Buzzer stopped	B+
AA	CAN_H	CAN system related module	Voltage	Terminal used for communication therefore determination based on terminal voltage is not possible.
AB	CAN_L	CAN system related module	Voltage	Terminal used for communication therefore determination based on terminal voltage is not possible.

Generated Pulse (reference)

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

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