BRAKE LIGHT UNIT INSPECTION

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

2.  Remove the following parts:

1.  Trunk covering (See TRUNK COVERING REMOVAL/INSTALLATION.)

2.  Trunk board (See TRUNK BOARD REMOVAL/INSTALLATION.)

3.  Trunk side pocket (See TRUNK SIDE POCKET REMOVAL/INSTALLATION.)

4.  Trunk end trim (See TRUNK END TRIM REMOVAL/INSTALLATION.)

5.  Rear scuff plate (See REAR SCUFF PLATE REMOVAL/INSTALLATION.)

6.  Third-row seat cushion (See THIRD-ROW SEAT CUSHION REMOVAL/INSTALLATION.)

7.  Third-row seat back component (See THIRD-ROW SEAT BACK COMPONENT REMOVAL/INSTALLATION.)

8.  Trunk side trim (LH) (See TRUNK SIDE 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)

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Terminal	Signal	Connection	Test condition		Voltage (V)	Inspection item(s)
A	Ground	Body ground	Under any condition		1.0 or less	Body ground
B	—	—	—		—	—
D	Brake light illumination request signal	Rear body control module (RBCM)	Connect the M-MDS and turn on the “STOP_LMP_CS” using the rear body control module (RBCM) simulation function		1.0 or less	•  Rear body control module (RBCM) •  Related wiring harness
			Connect the M-MDS and turn off the “STOP_LMP_CS” using the rear body control module (RBCM) simulation function		B+
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 •  Rear body control module (RBCM)	Brake pedal depressed		B+	•  Brake light •  Rear body control module (RBCM)
			Brake pedal not depressed		1.0 or less