Brake Light Unit Inspection
- Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
- Remove the following parts:
- 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 .)
- Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
- Verify that the voltages of each of the terminals are as indicated in the terminal voltage table.
- If the voltage is not as indicated in the table, inspect the parts under Inspection item (s).
- If the system does not work normally even though the parts or related wiring harnesses do not have any malfunction, replace the brake light unit. (See BRAKE LIGHT UNIT REMOVAL/INSTALLATION .)
- If the voltage is not as indicated in the table, inspect the parts under Inspection item (s).
| Terminal | Signal | Connection | Test condition | Voltage (V) | Inspection item(s) |
|---|---|---|---|---|---|
| A | Ground | Body ground | Under any condition | 1.0 or less | Body ground |
| D | Brake light illumination request signal | Rear body control module (RBCM) | Because this terminal is for communication, good/no good judgment by terminal voltage is not possible. | ||
| F | Power supply | STOP 10 A fuse | Under any condition | B+ |
|
| G | High-mount brake light signal | High-mount brake light | Brake pedal depressed | B+ | High-mount brake light |
| Brake pedal not depressed | 1.0 or less | ||||
| H | Brake light illumination status signal | DSC HU/CM | Brake pedal depressed | B+ | DSC HU/CM |
| Brake pedal not depressed | 1.0 or less | ||||
| I | Brake switch (No. 1 signal) signal | Brake switch (No. 1 signal) | Brake pedal depressed | B+ | Brake switch (No. 1 signal) |
| Brake pedal not depressed | 1.0 or less | ||||
| J | Brake light signal |
|
Brake pedal depressed | B+ |
|
| Brake pedal not depressed | 1.0 or less | ||||