PARKING ASSIST UNIT INSPECTION

id092200041900

1.  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

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)  Decoration panel (See DECORATION PANEL REMOVAL/INSTALLATION.)

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

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

3.  Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)

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) and related wiring harnesses.

―  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)

ac9wzw00004032

Terminal	Signal name	Connected to	Test condition		Voltage (V)	Inspection item
A	Ultrasonic sensor	Rear ultrasonic sensor (LH)	Wave pattern (See Inspection Using an Oscilloscope (reference).)			Rear ultrasonic sensor (LH)
B	Ultrasonic sensor GND	Rear ultrasonic sensor (LH)	Under any condition		1.0 or less	Rear ultrasonic sensor (LH)
C	Ultrasonic sensor	Rear ultrasonic sensor (RH)	Wave pattern (See Inspection Using an Oscilloscope (reference).)			Rear ultrasonic sensor (RH)
D	Ultrasonic sensor GND	Rear ultrasonic sensor (RH)	Under any condition		1.0 or less	Rear ultrasonic sensor (RH)
E	Ultrasonic sensor	Rear corner ultrasonic sensor (LH)	Wave pattern (See Inspection Using an Oscilloscope (reference).)			Rear corner ultrasonic sensor (LH)
F	Ultrasonic sensor GND	Rear corner ultrasonic sensor (LH), (RH)	Under any condition		1.0 or less	Rear corner ultrasonic sensor (LH), (RH)
G	Ultrasonic sensor	Rear corner ultrasonic sensor (RH)	Wave pattern (See Inspection Using an Oscilloscope (reference).)			Rear corner ultrasonic sensor (RH)
H	—	—	—		—	—
I	Ultrasonic sensor	Front corner ultrasonic sensor (LH)	Wave pattern (See Inspection Using an Oscilloscope (reference).)			Front corner ultrasonic sensor (LH)
J	Ultrasonic sensor GND	Front corner ultrasonic sensor (LH)	Under any condition		1.0 or less	Front corner ultrasonic sensor (LH)
K	Ultrasonic sensor	Front ultrasonic sensor (LH)	Wave pattern (See Inspection Using an Oscilloscope (reference).)			Front ultrasonic sensor (LH)
L	Ultrasonic sensor GND	Front ultrasonic sensor (LH)	Under any condition		1.0 or less	Front ultrasonic sensor (LH)
M	Ultrasonic sensor	Front ultrasonic sensor (RH)	Wave pattern (See Inspection Using an Oscilloscope (reference).)			Front ultrasonic sensor (RH)
N	Ultrasonic sensor GND	Front ultrasonic sensor (RH)	Under any condition		1.0 or less	Front ultrasonic sensor (RH)
O	Ultrasonic sensor	Front corner ultrasonic sensor (RH)	Wave pattern (See Inspection Using an Oscilloscope (reference).)			Front corner ultrasonic sensor (RH)
P	Ultrasonic sensor GND	Front corner ultrasonic sensor (RH)	Under any condition		1.0 or less	Front corner ultrasonic sensor (RH)
Q	GND	Body ground	Under any condition		1.0 or less	Body ground
R	—	—	—		—	—
S	Indicator	Parking sensor switch	Ignition switched ON (engine off or on)	Parking sensor switch ON (indicator on)	1.0 or less	Parking sensor switch
				Parking sensor switch OFF (indicator off)	B+
T	—	—	—		—	—
U	IG1	Ignition relay	Ignition switched ON (engine off or on)		B+	•  Ignition relay •  METER2 7.5A fuse
			Ignition switched off		1.0 or less
V	Parking sensor switch	Parking sensor switch	Ignition switched ON (engine off or on)	Parking sensor switch ON (indicator on)	1.0 or less	Parking sensor switch
				Parking sensor switch OFF (indicator off)	B+
W	Rear parking sensor buzzer	Rear parking sensor buzzer	Ignition switched ON (engine off or on)		B+	Rear parking sensor buzzer
			Ignition switched off or ACC		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	Rear parking sensor buzzer
				Buzzer stopped	B+
Y	Front parking sensor buzzer	Front parking sensor buzzer	Ignition switched ON (engine off or on)		B+	Front parking sensor buzzer
			Ignition switched off or ACC		1.0 or less
Z	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	Front parking sensor buzzer
				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.

Inspection Using an Oscilloscope (reference)

L.H.D.

R.H.D.

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

am6zzw00006971