PARKING ASSIST UNIT (OPTICAL) INSPECTION

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

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)  Side wall (See SIDE WALL REMOVAL/INSTALLATION.)

3.  Partially peel back the floor covering.

4.  Remove the foot support. (See FOOT SUPPORT REMOVAL/INSTALLATION.)

5.  Remove the cover. (See PARKING ASSIST UNIT (OPTICAL) REMOVAL/INSTALLATION.)

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

7.  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 (optical). (See PARKING ASSIST UNIT (OPTICAL) REMOVAL/INSTALLATION.)

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Terminal	Signal name	Connected to	Test condition		Voltage (V)	Inspection item
A	Power supply	ROOM 15 A fuse	Under any condition		B+	•  ROOM 15 A fuse •  Related wiring harness
B	—	—	—		—	—
C	ACC relay control	Ignition relay (ACC_STAB)	Ignition switched ON or ACC (engine off)		B+	•  Ignition relay (ACC_STAB) •  Related wiring harness
			Ignition switched OFF (LOCK)		1.0 or less
D	—	—	—		—	—
E	Retract/return signal	Power outer mirror switch	Retract/return switch OFF		1.0 or less	•  Power outer mirror switch •  Related wiring harness
			Retract/return switch ON		B+
F	—	—	—		—	—
G	—	—	—		—	—
H	GND	Body ground	Under any condition		1.0 or less	•  Body ground •  Related wiring harness
I	Monitor signal	Connectivity master unit (CMU)	•  Selector lever at R position (ATX) •  Shift lever at reverse gear position (MTX)		Approx. 2	•  Connectivity master unit (CMU) •  Related wiring harness
			•  Selector lever at not R position (ATX) •  Shift lever at not reverse gear position (MTX)		1.0 or less
J	—	—	—		—	—
K	Monitor GND	Connectivity master unit (CMU)	Under any condition		1.0 or less	•  Connectivity master unit (CMU) •  Related wiring harness
L	Shield ground	Connectivity master unit (CMU)	Under any condition		1.0 or less	•  Shield ground •  Related wiring harness
M	—	—	—		—	—
N	—	—	—		—	—
O	—	—	—		—	—
P	—	—	—		—	—
Q	—	—	—		—	—
R	—	—	—		—	—
S	—	—	—		—	—
T	—	—	—		—	—
U	Rear mount camera power supply	Rear mount camera	•  Selector lever at R position (ATX) •  Shift lever at reverse gear position (MTX)		Approx. 5	•  Rear mount camera •  Related wiring harness
			•  Selector lever at not R position (ATX) •  Shift lever at not reverse gear position (MTX)		1.0 or less
V	Rear mount camera GND	Rear mount camera	Under any condition		1.0 or less	•  Rear mount camera •  Related wiring harness
W	Rear mount camera signal	Rear mount camera	Wave pattern (See Inspection Using an Oscilloscope (Reference).)			•  Rear mount camera •  Related wiring harness
X	Rear mount camera GND	Rear mount camera	Under any condition		1.0 or less	•  Rear mount camera •  Related wiring harness
Y	Side camera power supply	Side camera (LH)	•  Selector lever at R position (ATX) •  Shift lever at reverse gear position (MTX)		Approx. 5	•  Side camera (LH) •  Related wiring harness
			•  Selector lever at not R position (ATX) •  Shift lever at not reverse gear position (MTX)		1.0 or less
Z	Side camera GND	Side camera (LH)	Under any condition		1.0 or less	•  Side camera (LH) •  Related wiring harness
AA	Side camera signal	Side camera (LH)	Wave pattern (See Inspection Using an Oscilloscope (Reference).)			•  Side camera (LH) •  Related wiring harness
AB	Side camera GND	Side camera (LH)	Under any condition		1.0 or less	•  Side camera (LH) •  Related wiring harness
AC	—	—	—		—	—
AD	—	—	—		—	—
AE	CAN_H	CAN system related module	Terminal used for communication therefore determination based on terminal voltage is not possible.
AF	CAN_L	CAN system related module	Terminal used for communication therefore determination based on terminal voltage is not possible.

Inspection Using an Oscilloscope (Reference)

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