REAR BODY CONTROL MODULE (RBCM) INSPECTION


id094000002200

1.  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].)

2.  Remove the following parts:

(1) Rear package tray (5HB only) (See REAR PACKAGE TRAY REMOVAL/INSTALLATION.)
(2) Trunk covering (5HB only) (See TRUNK COVERING REMOVAL/INSTALLATION.)
(3) Trunk end trim (5HB only) (See TRUNK END TRIM REMOVAL/INSTALLATION.)
(4) Rear seat cushion (5HB only) (See REAR SEAT CUSHION REMOVAL/INSTALLATION.)
(5) Rear scuff plate (LH) (5HB only) (See REAR SCUFF PLATE REMOVAL/INSTALLATION.)
(6) Tire house trim (LH) (5HB only) (See TIRE HOUSE TRIM REMOVAL/INSTALLATION.)
(7) Trunk side upper trim (LH) (5HB only) (See TRUNK SIDE UPPER TRIM REMOVAL/INSTALLATION.)
(8) Trunk side trim (LH) (See TRUNK SIDE TRIM REMOVAL/INSTALLATION.)

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

4.  Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].)

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

•  If the voltage is not as specified in the terminal voltage table (reference), inspect the parts under Inspection item(s) and related wiring harnesses.
―  If the system does not work normally even though the inspection items or related wiring harnesses do not have any malfunction, replace the rear body control module (RBCM).


Terminal Voltage Table (Reference)

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Terminal

Signal

Connected to

Measurement conditions

Voltage (V)

Inspection item(s)

1A*2
LIN communication ground
Intruder sensor
Under any condition
1.0 or less
Intruder sensor
1B
Interior light ground
•  Front map light
•  Vanity mirror illumination
Under any condition
1.0 or less
•  Front map light
•  Vanity mirror illumination
1C
1D
1E
Interior light control
Front map light
Under any condition
1.0 or less
Front map light
1F
1G*2
LIN communication ground
Intruder sensor
Terminal used for communication therefore determination based on terminal voltage is not possible.
1H
Interior light power supply
•  Front map light
•  Rear map light
•  Vanity mirror illumination (LH, RH)*1
•  Intruder sensor*2
Under any condition
B+
•  Front map light
•  Rear map light
•  Vanity mirror illumination (LH, RH)*1
•  Intruder sensor*2
2A
2B*3
Power supply
D.LOCK 25 A fuse
Under any condition
B+
•  D.LOCK 25 A fuse
•  Battery
2C*3
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
Unlock driver-side door lock switch from lock
1.0 or less
2D*4
Trunk lid opener switch signal (interior)
Trunk lid opener switch (interior)
Trunk lid opener switch (interior) pressed
1.0 or less
•  Trunk lid opener switch (interior)
•  Related wiring harness
Trunk lid opener switch (interior) not pressed
B+
2E*3
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
Lock driver-side door lock switch from unlock
1.0 or less
2F*2
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)
Connected to M-MDS and using data monitor function, theft-deterrent sound does not activate
B+
2G*3
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
Except above
1.0 or less
2H*5, *6
Brake light control
•  Brake light relay *6
•  Brake light unit *5
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 *6
•  Brake light unit *5
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
•  Battery
Ignition switched off
1.0 or less
2J*5, *6
Brake switch signal
•  Start stop unit
•  Brake switch
•  PCM
•  Brake light relay
Brake pedal depressed
B+
•  Start stop unit
•  Brake switch
•  PCM
•  Brake light relay
Brake pedal not depressed
1.0 or less
2K*7
Rear fog light power supply
STOP 10 A fuse
Under any condition
B+
•  STOP 10 A fuse
•  Battery
2L
2M*12
Power supply
R.WIPER 15 A fuse
Under any condition
B+
•  R.WIPER 15 A fuse
•  Battery
2N
2O
2P
Power supply
ROOM 15 A fuse
Under any condition
B+
•  ROOM 15 A fuse
•  Battery
3A*2
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
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*11
Door lock switch signal
Door lock switch (LH, RH)
Door lock switch unlocked
1.0 or less
Door lock switch (LH, RH)
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
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.
3J
Lock input (lock-link switch (passenger's side, rear door))
Door lock-link switch
The passenger-side and rear doors are all locked
4.6
Door lock-link switch
Among the passenger-side and rear doors, at least one door is unlocked
1.0 or less
3K
3L*8
Bonnet latch switch signal
Bonnet latch switch
Bonnet open
(bonnet latch switch OFF)
4.6
Bonnet latch switch
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)
Driver's door locked
4.6
Door lock-link switch (driver's door)
Driver's door unlocked
1.0 or less
3N*9
Fuel sensor power supply
Fuel gauge sender unit
Under any condition
5.0
Fuel gauge sender unit
3O
Lock input (front door lock-link switch (driver's door))
•  Door lock-link switch (driver's door)
•  Start stop unit
Driver's door locked
1.0 or less
•  Door lock-link switch (driver's door)
•  Start stop unit
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)
Rear door (RH) closed
B+
3R*10
Serial communication
SAS control module
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)
Rear door (LH) closed
B+
3T
Rear seat belt (RH) switch signal
Rear buckle switch (RH)
Ignition switched ON (engine off)
Insert rear seat belt (RH) into buckle
B+
Rear buckle switch (RH)
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)
Front door (passenger's door) closed
B+
3V
Rear seat belt (center) switch
Rear center buckle switch
Ignition switched ON (engine off)
Insert rear seat belt (center) into buckle
B+
Rear center buckle switch
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)
Front door (driver's door) closed
B+
3X
Rear seat belt (LH) switch
Rear buckle switch (LH)
Ignition switched ON (engine off)
Insert rear seat belt (LH) into buckle
B+
Rear buckle switch (LH)
Rear seat belt (LH) not inserted into buckle
1.0 or less
4A*12
Rear window wiper motor power supply
Rear wiper motor
Ignition switched ON (engine off)
B+
Rear wiper motor
Ignition switched off
1.0 or less
4B
Power ground
Body ground
Under any condition
1.0 or less
Body ground
4C
Liftgate lock actuator control
•  Liftgate lock actuator (5HB)
•  Trunk lid opener (4SD)
•  Press liftgate opener switch (5HB)
•  Press trunk lid opener switch (4SD)
B+→ 1.0 or less
•  Liftgate lock actuator (5HB)
•  Trunk lid opener (4SD)
Except above
1.0 or less
4D*5, *6
Brake light control
•  Brake light relay*6
•  Brake light unit*5
Brake pedal is depressed or PID/data monitor command STOP_LMP_CS is on
B+
•  Brake light relay*6
•  Brake light unit*5
Brake pedal not depressed
1.0 or less
4E
4F
Cargo compartment light power supply
•  Cargo compartment light (5HB)
•  Trunk compartment light (4SD)
Under any condition
B+
•  Cargo compartment light (5HB)
•  Trunk compartment light (4SD)
4G
CAN_H
CAN system related module
Terminal used for communication therefore determination based on terminal voltage is not possible.
4H
4I
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 lock actuator (5HB)
•  Trunk lid opener (4SD)
•  Liftgate open (5HB)
•  Trunk lid open (4SD)
1.0 or less
•  Liftgate lock actuator (5HB)
•  Trunk lid opener (4SD)
•  Liftgate closed (5HB)
•  Trunk lid closed (4SD)
B+
4L
4M
Liftgate opener switch signal
•  Liftgate opener switch (5HB)
•  Trunk lid opener switch (4SD)
•  Liftgate opener switch pressed (5HB)
•  Trunk lid opener switch pressed (4SD)
1.0 or less
•  Liftgate opener switch (5HB)
•  Trunk lid opener switch (4SD)
•  Liftgate opener switch not pressed (5HB)
•  Trunk lid opener switch not pressed (4SD)
4.5
4N
4O
4P
Cargo compartment light control
Cargo compartment light (5HB)
Cargo compartment light switched ON
Liftgate open
1.0 or less
Cargo compartment light (5HB)
Liftgate closed
B+
Trunk compartment light control
Trunk compartment light (4SD)
Trunk lid open
1.0 or less
Trunk compartment light (4SD)
Trunk lid closed
B+
4Q*7
Rear fog light control
Rear fog light
Light switch at TNS position
Rear fog light at OFF
1.0 or less
Rear fog light
Rear fog light at ON
B+
4R
Signal ground
Body ground
Under any condition
1.0 or less
Body ground
4S
Back-up light control
•  Back-up light (LH, RH)
•  Auto dimming mirror
Ignition switched ON (engine off)
•  Selector lever at R position (AT vehicle)
•  Shift lever at R position (MT vehicle)
B+
•  Back-up light (LH, RH)
•  Auto dimming mirror
Other
1.0 or less
4T*12
Rear wiper motor control (LO)
Rear wiper motor
Ignition switched ON (engine off)
Turn rear wiper switch ON and wiper is operated
1.0 or less
Rear wiper motor
Rear wiper switch at OFF
B+

*1  :With vanity mirror illumination
*2  :With theft-deterrent system
*3  :With double locking system
*4  :With trunk lid opener switch (interior)
*5  :With smart brake support
*6  :Without smart brake support, with smart city brake support
*7  :With rear fog light
*8  :With bonnet latch switch
*9  :Fuel gauge sender unit connector 5-pin type
*10  :With collision detection unlock
*11  :With door lock switch
*12  :With rear wiper and washer system