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:

4SD

1. Rear scuff plate (See REAR SCUFF PLATE REMOVAL/INSTALLATION.)

2. Rear seat cushion (See REAR SEAT CUSHION REMOVAL/INSTALLATION.)

3. Rear seat side back (See REAR SEAT SIDE BACK REMOVAL/INSTALLATION.)

4. Tire house trim (See TIRE HOUSE TRIM REMOVAL/INSTALLATION.)

5. C-pillar trim (See C-PILLAR TRIM REMOVAL/INSTALLATION.)

6. High-mount brake light (See HIGH-MOUNT BRAKE LIGHT REMOVAL/INSTALLATION.)

7. Rear package trim (See REAR PACKAGE TRIM REMOVAL/INSTALLATION.)

8. Rear body control module (RBCM) (See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION.)

9. Upper anchor installation bolts on the rear center seat belt (See REAR CENTER SEAT BELT REMOVAL/INSTALLATION.)

10. Rear body control module (RBCM) bracket and backup power supply as a single unit (See REAR BODY CONTROL MODULE (RBCM) BRACKET REMOVAL/INSTALLATION.)

WGN

1. Rear scuff plate (LH) (See REAR SCUFF PLATE REMOVAL/INSTALLATION.)

2. Trunk covering (See TRUNK COVERING REMOVAL/INSTALLATION.)

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

4. Trunk side pocket (See TRUNK SIDE POCKET REMOVAL/INSTALLATION.)

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

6. Rear seat belt lower anchor installation bolt (LH) (See REAR SEAT BELT REMOVAL/INSTALLATION.)

7. Trunk side upper trim (LH) (See TRUNK SIDE UPPER TRIM REMOVAL/INSTALLATION.)

8. Trunk side trim (LH) (See TRUNK SIDE TRIM REMOVAL/INSTALLATION.)

9. Rear body control module (RBCM), rear body control module (RBCM) bracket, and backup power supply as a single unit (See REAR BODY CONTROL MODULE (RBCM) BRACKET REMOVAL/INSTALLATION.)

3. Connect the backup power supply connector.

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)

IG1 relay No.2

Ignition switched ON (engine off or on)

B+

•  IG1 relay No.2

•  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

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)	IG1 relay No.2	Ignition switched ON (engine off or on)	B+	• IG1 relay No.2 • Related wiring harness
B	Power supply (IG1)	IG1 relay No.2	Ignition switched OFF (LOCK)	1.0 or less	• IG1 relay No.2 • Related wiring harness
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