REAR BODY CONTROL MODULE (RBCM) INSPECTION

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1.  When replacing the rear body control module (RBCM), perform the configuration. (See REAR BODY CONTROL MODULE (RBCM) CONFIGURATION (USING READ/WRITE FUNCTION).)

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

3.  Remove the following parts:

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

(2)  Bass-box (with Bose®) (See BASS-BOX REMOVAL/INSTALLATION.)

(3)  Sub-trunk (See SUB-TRUNK REMOVAL/INSTALLATION.)

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

(5)  Trunk side trim (LH) (See TRUNK SIDE TRIM REMOVAL/INSTALLATION.)

4.  Remove the rear body control module (RBCM) from the body with the connector connected. (See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION.)

5.  Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

6.  Verify that the voltages of each of the terminals are as indicated in the Terminal Voltage Table (Reference).

•  If the voltage is not as indicated in the table, inspect the parts under Inspection item(s).

―  If the system does not launch normally even though inspection items are normal, specify the location of the malfunction based on the instructions from the on-board diagnostic system and the symptom troubleshooting, and perform repairs.

Terminal Voltage Table (Reference)

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Terminal	Signal	Connected to	Measurement conditions		Voltage (V)	Inspection item(s)
1A*1	LIN communication ground	Intruder sensor	Under any condition		1.0 or less	•  Intruder sensor •  Related wiring harness
1B	Interior light ground	•  Front map light •  Rear map light •  Vanity mirror illumination (LH, RH)*2	Under any condition		1.0 or less	•  Front map light •  Rear map light •  Vanity mirror illumination (LH, RH)*2 •  Related wiring harness
1C	Foot light control	•  Front foot light •  Rear foot light	LED ON		B+	•  Front foot light •  Rear foot light
			LED OFF		1.0 or less
1D	Down light control	•  Console ambient light	LED ON		B+	•  Console ambient light
			LED OFF		1.0 or less
1E	Interior light control	•  Front map light	Under any condition		1.0 or less	•  Front map light •  Related wiring harness
1F	Interior light power supply	•  Front map light •  Rear map light •  Vanity mirror illumination (LH, RH)*2	Under any condition		B+	•  Front map light •  Rear map light •  Vanity mirror illumination (LH, RH)*2 •  Related wiring harness
1G*1	LIN communication	Intruder sensor	Terminal used for communication therefore determination based on terminal voltage is not possible.
1H*1	Power supply	Intruder sensor	Under any condition		B+	•  Intruder sensor •  Related wiring harness
2A	—	—	—		—	—
2B	Power supply	D.LOCK 25 A fuse	Under any condition		B+	•  D.LOCK 25 A fuse •  Related wiring harness
2C	Door lock control	Door lock actuator	Lock driver-side door lock switch from unlock		1.0 or less → B+→ 1.0 or less	•  Door lock actuator •  Related wiring harness
			Unlock driver-side door lock switch from lock		1.0 or less
2D	—	—	—		—	—
2E	Door unlock control	Door lock actuator	Unlock driver-side door lock switch from lock		1.0 or less → B+→ 1.0 or less	•  Door lock actuator •  Related wiring harness
			Lock driver-side door lock switch from unlock		1.0 or less
2F*1	Theft-deterrent horn relay control	Front body control module (FBCM)	Connected to M-MDS and using data monitor function, theft-deterrent sound activates		1.0 or less	•  Front body control module (FBCM) •  Related wiring harness
			Connected to M-MDS and using data monitor function, theft-deterrent sound does not activate		B+
2G	Double locking system control	Door lock actuator	Press transmitter lock button two times (double locking system operation condition)		B+→ 1.0 or less	•  Door lock actuator •  Related wiring harness
			Except above		1.0 or less
2H	Brake light control	•  Brake light relay •  Brake light unit*3	Connect the M-MDS and turn on the “STOP_LMP_CS” using the rear body control module (RBCM) simulation function		1.0 or less	•  Brake light relay •  Brake light unit*3 •  Related wiring harness
			Connect the M-MDS and turn off the “STOP_LMP_CS” using the rear body control module (RBCM) simulation function		B+
2I	Ignition power supply	METER1 10 A fuse	Ignition switched ON (engine off)		B+	•  METER1 10 A fuse •  Related wiring harness
			Ignition switched OFF (LOCK)		1.0 or less
2J	Brake switch signal	•  Start stop unit •  Brake switch	Brake pedal depressed		B+	•  Start stop unit •  Brake switch •  Related wiring harness
			Brake pedal not depressed		1.0 or less
2K*4	Rear fog light power supply	STOP 10 A fuse	Under any condition		B+	•  STOP 10 A fuse •  Related wiring harness
2L	—	—	—		—	—
2M	Power supply	R.WIPER 15 A fuse	Under any condition		B+	•  R.WIPER 15 A fuse •  Battery •  Related wiring harness
2N	—	—	—		—	—
2O	—	—	—		—	—
2P	Power supply	ROOM 15 A fuse	Under any condition		B+	•  ROOM 15 A fuse •  Related wiring harness
3A*1	LIN communication	Theft-deterrent siren	Terminal used for communication therefore determination based on terminal voltage is not possible.
3B	Serial communication	Start stop unit	Terminal used for communication therefore determination based on terminal voltage is not possible.
3C	Fuel sensor ground	Fuel gauge sender unit	Under any condition		1.0 or less	•  Fuel gauge sender unit •  Related wiring harness
3D	Serial communication	Power window main switch	Terminal used for communication therefore determination based on terminal voltage is not possible.
3E	CAN_H	CAN system related module	Terminal used for communication therefore determination based on terminal voltage is not possible.
3F	Door lock switch signal	Door lock switch	Door lock switch unlocked		1.0 or less	•  Door lock switch •  Related wiring harness
			Other		4.5
			Door lock switch locked		2.2
3G	CAN_L	CAN system related module	Terminal used for communication therefore determination based on terminal voltage is not possible.
3H	Driver-side door key cylinder switch signal	Door key cylinder switch	Door key cylinder is turned to unlock side		1.0 or less	•  Door key cylinder switch •  Related wiring harness
			Other		4.5
			Door key cylinder is turned to lock side		2.2
3I	Fuel sensor signal	Fuel gauge sender unit	Inspect the fuel gauge sender unit and related wiring harnesses because the terminal voltage at this terminal cannot be examined. (See FUEL GAUGE SENDER UNIT INSPECTION [2WD].) (See FUEL GAUGE SENDER UNIT INSPECTION [4WD].)
3J	Lock input (lock-link switch (passenger's side, rear door))	•  Door lock-link switch •  Power liftgate (PLG) control module	The passenger-side and rear doors are all locked		4.6	•  Door lock-link switch •  Power liftgate (PLG) control module •  Related wiring harness
			Among the passenger-side and rear doors, at least one door is unlocked		1.0 or less
3K*5	Fuel sensor signal (sub)	Fuel gauge sender unit (sub)	Inspect the fuel gauge sender unit and related wiring harnesses because the terminal voltage at this terminal cannot be examined. (See FUEL GAUGE SENDER UNIT INSPECTION [4WD].)
3L*6	Bonnet latch switch signal	Bonnet latch switch	Bonnet open (Bonnet latch switch OFF)		4.6	•  Bonnet latch switch •  Related wiring harness
			Bonnet is closed (Bonnet latch switch ON)		1.0 or less
3M	Unlock input (front door lock-link switch (driver's door))	•  Door lock-link switch (driver's door) •  Power liftgate (PLG) control module	Driver's door locked		4.6	•  Door lock-link switch (driver's door) •  Power liftgate (PLG) control module •  Related wiring harness
			Driver's door unlocked		1.0 or less
3N	—	—	—		—	—
3O	Lock input (front door lock-link switch (driver's door))	•  Door lock-link switch (driver's door) •  Start stop unit •  Power liftgate (PLG) control module	Driver's door locked		1.0 or less	•  Door lock-link switch (driver's door) •  Start stop unit •  Power liftgate (PLG) control module •  Related wiring harness
			Driver's door unlocked		4.6
3P	—	—	—		—	—
3Q	Rear door switch (RH) signal	Door latch switch (RR)	Rear door (RH) open		1.0 or less	•  Rear door switch (RH) •  Related wiring harness
			Rear door (RH) closed		B+
3R	Serial communication	•  SAS control module •  Mazda era-glonass control module*7	Terminal used for communication therefore determination based on terminal voltage is not possible.
3S	Rear door switch (LH) signal	Door latch switch (LR)	Rear door (LH) open		1.0 or less	•  Rear door switch (LH) •  Related wiring harness
			Rear door (LH) closed		B+
3T	Rear buckle switch (RH) power supply	Rear buckle switch (RH)	Ignition switched ON (engine off)	Insert rear seat belt (RH) into buckle	B+	•  Rear buckle switch (RH) •  Related wiring harness
				Rear seat belt (RH) not inserted into buckle	1.0 or less
3U	Front door switch (passenger's door) signal	Door latch switch (passenger's door)	Front door (passenger's door) open		1.0 or less	•  Front door switch (passenger's door) •  Related wiring harness
			Front door (passenger's door) closed		B+
3V	Rear center buckle switch power supply	Rear center buckle switch	Ignition switched ON (engine off)	Insert rear seat belt (center) into buckle	B+	•  Rear center buckle switch •  Related wiring harness
				Rear seat belt (center) not inserted into buckle	1.0 or less
3W	Front door switch (driver's door) signal	Door latch switch (driver's door)	Front door (driver's door) open		1.0 or less	•  Front door switch (driver's door) •  Related wiring harness
			Front door (driver's door) closed		B+
3X	Rear buckle switch (LH) power supply	Rear buckle switch (LH)	Ignition switched ON (engine off)	Insert rear seat belt (LH) into buckle	B+	•  Rear buckle switch (LH) •  Related wiring harness
				Rear seat belt (LH) not inserted into buckle	1.0 or less
4A	Rear window wiper motor power supply	Rear wiper motor	Ignition switched ON (engine off)		B+	•  Rear wiper motor •  Related wiring harness
			Ignition switched OFF (LOCK)		1.0 or less
4B	Power ground	Body ground	Under any condition		1.0 or less	•  Related wiring harness
4C	Liftgate latch and lock actuator	Liftgate latch and lock actuator	Press liftgate opener switch		B+→ 1.0 or less	•  Liftgate latch and lock actuator •  Related wiring harness
			Except above		1.0 or less
4D	Brake light control	•  Brake light unit*3 •  Brake light relay	Brake pedal depressed		B+	•  Brake light unit*3 •  Brake light relay •  Related wiring harness
			Brake pedal not depressed		1.0 or less
4E	—	—	—		—	—
4F	Cargo compartment light power supply	Cargo compartment light	Under any condition		B+	•  Cargo compartment light •  Related wiring harness
4G	CAN_H	CAN system related module	Terminal used for communication therefore determination based on terminal voltage is not possible.
4H	—	—	—		—	—
4I	CAN_H	CAN system related module	Terminal used for communication therefore determination based on terminal voltage is not possible.
4J	CAN_L	CAN system related module	Terminal used for communication therefore determination based on terminal voltage is not possible.
4K	Liftgate latch switch signal	Liftgate latch and lock actuator	Liftgate open		1.0 or less	•  Liftgate latch and lock actuator •  Related wiring harness
			Liftgate closed		B+
4L	CAN_L	CAN system related module	Terminal used for communication therefore determination based on terminal voltage is not possible.
4M	Liftgate opener switch signal	Liftgate opener switch Power liftgate (PLG) control module	Liftgate opener switch pressed		1.0 or less	•  Liftgate opener switch •  Power liftgate (PLG) control module •  Related wiring harness
			Liftgate opener switch not pressed		4.5
4N	—	—	—		—	—
4O	—	—	—		—	—
4P	Cargo compartment light control	Cargo compartment light	Liftgate open		1.0 or less	•  Cargo compartment light •  Related wiring harness
			Liftgate closed		B+
4Q*4	Rear fog light control	Rear fog light	Light switch at TNS position	Rear fog light at OFF	1.0 or less	•  Rear fog light •  Related wiring harness
				Rear fog light at ON	B+
4R	Signal ground	Body ground	Under any condition		1.0 or less	•  Related wiring harness
4S	Back-up light control	•  Back-up light (LH, RH) •  Auto dimming rear view mirror	Ignition switched ON (engine off)	Selector lever at R position	B+	•  Back-up light switch •  Auto dimming rear view mirror •  Related wiring harness
				Other	1.0 or less
4T	Rear wiper motor control (LO)	Rear wiper motor	Rear wiper switch at ON		1.0 or less	•  Rear wiper motor •  Related wiring harness
			Rear wiper switch at OFF		B+