BRAKE LIGHT UNIT INSPECTION
id091800400100
4SD
1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)
2. 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) Tire house trim (See TIRE HOUSE TRIM REMOVAL/INSTALLATION.)
- (4) C-pillar trim (See C-PILLAR TRIM REMOVAL/INSTALLATION.)
- (5) High-mount brake light (See HIGH-MOUNT BRAKE LIGHT REMOVAL/INSTALLATION.)
- (6) Rear package trim (See REAR PACKAGE TRIM REMOVAL/INSTALLATION.)
3. Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)
4. 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.)
Terminal voltage list (reference)
|
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
|
Body control module (BCM)
|
Because this terminal is for communication, integrity determination by terminal voltage is not possible.
|
|
F
|
Power supply
|
STOP 10 A fuse
|
Under any condition
|
B+
|
• STOP 10 A fuse
• Battery
|
|
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 light
• Body control module (BCM)
|
Brake pedal depressed
|
B+
|
• Brake light
• Body control module (BCM)
|
|
Brake pedal not depressed
|
1.0 or less
|
5HB
1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)
2. Remove the following parts:
- (1) Rear package tray (See REAR PACKAGE TRAY REMOVAL/INSTALLATION.)
- (2) Trunk covering (See TRUNK COVERING REMOVAL/INSTALLATION.)
- (3) Trunk board (See TRUNK BOARD REMOVAL/INSTALLATION.)
- (4) Trunk end trim (See TRUNK END TRIM REMOVAL/INSTALLATION.)
- (5) Rear seat cushion (See REAR SEAT CUSHION REMOVAL/INSTALLATION.)
- (6) Rear seat belt lower anchor installation bolt (LH) (See REAR SEAT BELT REMOVAL/INSTALLATION.)
- (7) Rear scuff plate (LH) (See REAR SCUFF PLATE REMOVAL/INSTALLATION.)
- (8) Trunk side trim (LH) (See TRUNK SIDE TRIM REMOVAL/INSTALLATION.)
- (9) C-pillar trim (LH) (See C-PILLAR TRIM REMOVAL/INSTALLATION.)
3. Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)
4. 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.)
Terminal voltage list (reference)
|
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
|
Body control module (BCM)
|
Because this terminal is for communication, integrity determination by terminal voltage is not possible.
|
|
F
|
Power supply
|
STOP 10 A fuse
|
Under any condition
|
B+
|
• STOP 10 A fuse
• Battery
|
|
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 light
• Body control module (BCM)
|
Brake pedal depressed
|
B+
|
• Brake light
• Body control module (BCM)
|
|
Brake pedal not depressed
|
1.0 or less
|
