Backup Power Supply Inspection
- Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
- Remove the following parts:
4SD
- Rear scuff plate (See REAR SCUFF PLATE REMOVAL/INSTALLATION .)
- Rear seat cushion (See REAR SEAT CUSHION REMOVAL/INSTALLATION .)
- Rear seat side back (See REAR SEAT SIDE BACK REMOVAL/INSTALLATION .)
- Tire house trim (See TIRE HOUSE TRIM REMOVAL/INSTALLATION .)
- C-pillar trim (See C-PILLAR TRIM REMOVAL/INSTALLATION .)
- High-mount brake light (See HIGH-MOUNT BRAKE LIGHT REMOVAL/INSTALLATION .)
- Rear package trim (See REAR PACKAGE TRIM REMOVAL/INSTALLATION .)
- Rear body control module (RBCM) (See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION .)
- Upper anchor installation bolts on the rear center seat belt (See REAR CENTER SEAT BELT REMOVAL/INSTALLATION .)
- Rear body control module (RBCM) bracket and backup power supply as a single unit (See REAR BODY CONTROL MODULE (RBCM) BRACKET REMOVAL/INSTALLATION .)
- Connect the backup power supply connector.
- Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
- 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 .)
- If the voltage is not as specified in the terminal voltage table (reference), inspect the parts under Inspection item(s) and related wiring harnesses.
TEST CONDITION SPECIFICATION
| Terminal | Signal name | Connected to | Test condition | Voltage (V) | Inspection item |
|---|---|---|---|---|---|
| A | Power supply | Rear body control module (RBCM) | Under any condition | B+ |
|
| B | Power supply (IG1) | IG1 relay No. 2 | Ignition switched ON (engine off or on) | B+ |
|
| Ignition switched OFF (LOCK) | 1.0 or less | ||||
| C | Power supply | D.LOCK 25 A fuse | Under any condition | B+ |
|
| D | - | - | - | - | - |
| E | - | - | - | - | - |
| F | - | - | - | - | - |
| G | - | - | - | - | - |
| H | GND | Body ground | Under any condition | 1.0 or less |
|
| I | - | - | - | - | - |
| J | GND | Body ground | Under any condition | 1.0 or less |
|