id091800400100


4SD

1.Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL 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 terminal. (See NEGATIVE BATTERY TERMINAL 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)

am6xuw00005607

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 terminal. (See NEGATIVE BATTERY TERMINAL 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 terminal. (See NEGATIVE BATTERY TERMINAL 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)

am6xuw00005607

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