BACKUP POWER SUPPLY INSPECTION

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

2.  Remove the following parts:

(1)  Tonneau cover (See TONNEAU COVER REMOVAL/INSTALLATION.)

(2)  Trunk board (See TRUNK BOARD REMOVAL/INSTALLATION.)

(3)  Bass-box (with Bose®) (See BASS-BOX REMOVAL/INSTALLATION.)

(4)  Sub-trunk (See SUB-TRUNK REMOVAL/INSTALLATION.)

(5)  Trunk end trim (See TRUNK END TRIM REMOVAL/INSTALLATION.)

3.  Pull back the trunk side trim (LH) to a position which allows for the removal of the backup power supply. (See TRUNK SIDE TRIM REMOVAL/INSTALLATION.)

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

5.  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 backup power supply. (See BACKUP POWER SUPPLY REMOVAL/INSTALLATION.)

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Terminal	Signal name	Connected to	Test condition		Voltage (V)	Inspection item
A	Power supply	Rear body control module (RBCM)	Under any condition		B+	•  Rear body control module (RBCM) •  Related wiring harness
B	Power supply (IG1)	METER1 10 A fuse	Ignition switched ON (engine off or on)		B+	•  METER1 10 A fuse •  Related wiring harness
			Ignition switched OFF (LOCK)		1.0 or less
C	Power supply	D.LOCK 25 A fuse	Under any condition		B+	•  D.LOCK 25 A fuse •  Related wiring harness
D	—	—	—		—	—
E	—	—	—		—	—
F	—	—	—		—	—
G	—	—	—		—	—
H	GND	Body ground	Under any condition		1.0 or less	•  Body ground •  Related wiring harness
I	—	—	—		—	—
J	GND	Body ground	Under any condition		1.0 or less	•  Body ground •  Related wiring harness