Backup Power Supply Removal/Installation

Operate the door lock actuator using the following procedure and deplete the energy stored in the backup power supply.
NOTE:
- If the energy stored in the backup power supply has already been depleted, the door lock actuator does not operate. As this does not indicate an improper procedure, continue to perform the procedure as indicated.
1. Remove the D.LOCK 25A fuse.
2. Close the front door (driver's side)
3. Repeat the lock/unlock operation of the door lock switch (driver's side) until all the door lock knobs do not move.
Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Lower the rear seat back.
Remove the following parts:
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 .)
Remove the nuts.

Fig 1: Backup Power Supply Nuts With Torque Specification
Courtesy of MAZDA MOTORS CORP.
Remove the backup power supply.
Install in the reverse order of removal.