BODY CONTROL MODULE (BCM) INSPECTION


id094000003900


L.H.D.

1.  Remove the front scuff plate. (LH) (See FRONT SCUFF PLATE REMOVAL/INSTALLATION.)

2.  Remove the front side trim. (LH) (See FRONT SIDE TRIM REMOVAL/INSTALLATION.)

3.  Remove the driver-side lower panel. (See DRIVER-SIDE LOWER PANEL REMOVAL/INSTALLATION.)

4.  Remove the auto leveling control module (with headlight auto leveling system). (See DRIVER-SIDE LOWER PANEL REMOVAL/INSTALLATION.)

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 are normal, identify the malfunctioning location according to the directions in [DIAGNOSTIC SYSTEM] and [SYMPTOM TROUBLESHOOTING] then perform repairs.


R.H.D.

1.  Remove the front scuff plate.(LH) (See FRONT SCUFF PLATE REMOVAL/INSTALLATION.)

2.  Remove the front side trim.(LH) (See FRONT SIDE TRIM REMOVAL/INSTALLATION.)

3.  Remove the blower unit. (See BLOWER UNIT REMOVAL/INSTALLATION.)

4.  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 are normal, identify the malfunctioning location according to the directions in [DIAGNOSTIC SYSTEM] and [SYMPTOM TROUBLESHOOTING] then perform repairs.

am2zzw00007930

Terminal Voltage Table (Reference)

Terminal

Signal

Connected to

Measurement condition

Voltage (V)

Inspection item(s)

1A
Power supply
HAZARD 15 A fuse
Under any condition
B+
HAZARD 15 A fuse
1B
Power supply
•  ROOM 25 A fuse
•  INTERIOR 15 A fuse
Under any condition
B+
•  ROOM 25 A fuse
•  INTERIOR 15 A fuse
1C
1D*1
Brake light control
Brake light relay
Body control module (BCM) simulation item STOP_LMP_CTL is on
1.0 or less
Brake light relay
Body control module (BCM) simulation item STOP_LMP_CTL is off
B+
1E
Rear turn light (RH) control
•  Rear turn light (RH)
•  Side turn light (RH)
Ignition is switched ON (engine off or on)
Turn switch is in right turn position
1.0 or less ↔ B+
•  Rear turn light (RH)
•  Side turn light (RH)
Turn switch is in position other than above
1.0 or less
1F
1G
Rear turn light (LH) control
•  Rear turn light (LH)
•  Side turn light (LH)
Ignition is switched ON (engine off or on)
Turn switch is in left turn position
1.0 or less ↔ B+
•  Rear turn light (LH)
•  Side turn light (LH)
Turn switch is in position other than above
1.0 or less
1H
Interior light power supply
Front map light
Under any condition
B+
Front map light
1I
1J
1K
Ground
Body ground
Under any condition
1.0 or less
Body ground
1L
Ground
Body ground
Under any condition
1.0 or less
Body ground
2A
Lock input (front door lock-link switch (driver's side))
Front door latch and lock actuator (driver's side)
Driver's door is locked
1.0 or less
Front door latch and lock actuator (driver's side)
Driver's door is unlocked
Approx. 10
2B
Unlock input (front door lock-link switch (driver's side))
Front door latch and lock actuator (driver's side)
Driver's door is locked
Approx. 9.5
Front door latch and lock actuator (driver's side)
Driver's door is unlocked
1.0 or less
2C
CAN_L
CAN system related module
Terminal used for communication therefore determination based on terminal voltage is not possible.
2D
CAN_H
CAN system related module
Terminal used for communication therefore determination based on terminal voltage is not possible.
2E
Rear door latch switch (LH) signal
Rear door latch and lock actuator (LH)
Rear door (LH) is open
1.0 or less
Rear door latch and lock actuator (LH)
Rear door (LH) is closed
Approx. 9.5
2F
Rear door latch switch (RH) signal
Rear door latch and lock actuator (RH)
Rear door (RH) is open
1.0 or less
Rear door latch and lock actuator (RH)
Rear door (RH) is closed
Approx. 9.5
2G
Front door latch switch (passenger's side) signal
Front door latch and lock actuator (passenger's side)
Front door (passenger's side) is open
1.0 or less
Front door latch and lock actuator (passenger's side)
Front door (passenger's side) is closed
Approx. 9.0
2H
Front door latch switch (driver's side) signal
Front door latch and lock actuator (driver's side)
Front door (driver's side) is open
1.0 or less
Front door latch and lock actuator (driver's side)
Front door (driver's side) is closed
Approx. 9.5
2I
Serial communication
Power window main switch
Terminal used for communication therefore determination based on terminal voltage is not possible.
2J
Serial communication
Start stop unit
Terminal used for communication therefore determination based on terminal voltage is not possible.
2K*2
Door lock switch signal
Door lock switch (RH)
Door lock switch is turned to unlock side (driver’s side or passenger’s side)
1.0 or less
Door lock switch (RH)
Door lock switch is turned to lock side (driver’s side or passenger’s side)
Approx. 1.25
Other
Approx 5.0
2L
Front door key cylinder switch signal
Front door latch and lock actuator (driver’s side)
Door key cylinder is turned to unlock side
1.0 or less
Front door latch and lock actuator (driver’s side)
Door key cylinder is turned to lock side
Approx. 1.25
Other
Approx 5.0
2M*3
Lock input (front door lock-link switch (passenger's side), rear door lock-link switch)
•  Front door latch and lock actuator (passenger's side)
•  Rear door latch and lock actuator (driver's side), (passenger's side)
Passenger’s door or rear seat door is unlocked
1.0 or less
•  Front door latch and lock actuator (passenger's side)
•  Rear door latch and lock actuator (driver's side), (passenger's side)
Passenger’s door and rear seat door are locked
B+
2N
Rear seat belt switch (LH) signal
Rear buckle switch (LH)
Insert rear seat belt (LH) into buckle
1.0 or less
Rear buckle switch (LH)
Rear seat belt (LH) not inserted into buckle
B+
2O
Rear seat belt (center) switch signal
Rear center buckle switch
Insert rear seat belt (center) into buckle
1.0 or less
Rear center buckle switch
Rear seat belt (center) not inserted into buckle
B+
2P
Rear seat belt switch (RH) signal
Rear buckle switch (RH)
Insert rear seat belt (RH) into buckle
1.0 or less
Rear buckle switch (RH)
Rear seat belt (RH) not inserted into buckle
B+
2Q
Fuel sensor signal
Fuel gauge sender unit
Inspect fuel gauge sender unit and related wiring harness because determination based on terminal voltage is not possible.
2R
Fuel sensor ground
Fuel gauge sender unit
Under any condition
1.0 or less
Fuel gauge sender unit
2S
•  Liftgate unlatch switch signal (5HB)
•  Trunk unlatch switch signal (5HB)
•  Liftgate opener switch (5HB)
•  Trunk lid opener switch (exterior) (4SD)
•  Liftgate is opened (5HB)
•  Trunk is opened (4SD)
1.0 or less
•  Liftgate opener switch (5HB)
•  Trunk lid opener switch (exterior) (4SD)
•  Liftgate is closed (5HB)
•  Trunk is closed (4SD)
Approx. 4.5
2T
2U
2V
2W*3
LIN communication
Theft-deterrent siren
Terminal used for communication therefore determination based on terminal voltage is not possible.
2X
2Y
LIN communication
Electrical supply unit (ESU)
Terminal used for communication therefore determination based on terminal voltage is not possible.
2Z*1
Brake switch signal
•  Start stop unit
•  Brake switch (No.1 signal)
Brake pedal is depressed
B+
•  Start stop unit
•  Brake switch (No.1 signal)
Brake pedal is not depressed
1.0 or less
2AA*10
PTC heater communication
PTC heater
Terminal used for communication therefore determination based on terminal voltage is not possible.
2AB*1
Brake light control
•  Brake light relay
•  Brake light (LH), (RH)
•  High-mount brake light
•  Condenser
Brake pedal is depressed
B+
•  Brake light relay
•  Brake light (LH), (RH)
•  High-mount brake light
•  Condenser
Brake pedal is not depressed
1.0 or less
2AC
•  Liftgate latch switch signal (5HB)
•  Trunk lid latch switch signal (4SD)
•  Liftgate latch and lock actuator (5HB)
•  Trunk lid latch and release actuator (4SD)
•  Liftgate is opened (5HB)
•  Trunk is opened (4SD)
1.0 or less
•  Liftgate latch and lock actuator (5HB)
•  Trunk lid latch and release actuator (4SD)
•  Liftgate is closed (5HB)
•  Trunk is closed (4SD)
Approx. 9.5
2AD
2AE
2AF
3A
Front turn light (RH) control
Front turn light (RH)
Ignition is switched ON (engine off or on)
Turn switch is in right turn position
1.0 or less ↔ B+
Front turn light (RH)
Turn switch is in position other than above
1.0 or less
3B
Front turn light (LH) control
Front turn light (LH)
Ignition is switched ON (engine off or on)
Turn switch is in left turn position
1.0 or less ↔ B+
Front turn light (LH)
Turn switch is in position other than above
1.0 or less
3C
CAN_H
CAN system related module
Terminal used for communication therefore determination based on terminal voltage is not possible.
3D
CAN_L
CAN system related module
Terminal used for communication therefore determination based on terminal voltage is not possible.
3E
Blower motor relay control
•  Blower relay
•  HEATER 40 A fuse
Ignition is switched ON (engine off or on)
Blower motor is operated using fan switch
1.0 or less
•  Blower relay
•  HEATER 40 A fuse
Blower motor is turned off by pressing climate control unit OFF button
B+
3F
Windshield wiper INT relay control
Wiper INT relay
Ignition is switched ON (engine off or on)
Windshield wiper switch is in position other than OFF
1.0 or less
Wiper INT relay
Windshield wiper switch is in OFF position
B+
3G
Windshield wiper motor (HI) control
Wiper HI relay
Ignition is switched ON (engine off or on)
Windshield wiper switch is in HIGH position
1.0 or less
Wiper HI relay
Windshield wiper switch is in OFF position
B+
3H
Horn relay control
Horn relay
Ignition is switched ON (engine off or on)
Horn switch is on
1.0 or less
Horn relay
Horn switch is off
B+
3I*3
Front fog light relay control
Front fog light relay
Ignition is switched ON (engine off or on)
Front fog light switch is on
1.0 or less
Front fog light relay
Front fog light switch is off
B+
3J
Head light cleaner relay control
•  Head light cleaner relay
•  H/CLEAN 20 A fuse
Ignition is switched ON (engine off or on)
Connect the M-MDS and turn on the "H/L_CLN_RY" using the body control module (BCM) simulation function
1.0 or less
•  Head light cleaner relay
•  H/CLEAN 20 A fuse
Connect the M-MDS and turn off the "H/L_CLN_RY" using the body control module (BCM) simulation function
B+
3K
Rear window defogger relay control
Rear window defogger relay
Ignition is switched ON (engine off or on)
Rear window defogger switch is on
1.0 or less
Rear window defogger relay
Rear window defogger switch is off
B+
3L*4
Burglar horn relay control
Theft-deterrent relay
Ignition is switched ON (engine off or on)
Horn switch is on
B+
Theft-deterrent relay
Horn switch is off
1.0 or less
3M
Autostop switch signal
Windshield wiper motor
Ignition is switched ON (engine off or on)
Windshield wipers are stopped in position other than park
1.0 or less
Windshield wiper motor
Windshield wipers are stopped in park position
B+
3N
Power supply
•  ENG+B 7.5 A fuse
•  ROOM 25 A fuse
Under any condition
B+
•  ENG+B 7.5 A fuse
•  ROOM 25 A fuse
3O
Ignition power supply
METER1 10 A fuse
Ignition is switched ON (engine off or on)
B+
METER1 10 A fuse
The ignition is switched off (LOCK)
1.0 or less
3P
3Q*5
Washer fluid level sensor signal
Washer fluid level sensor
Ignition is switched ON (engine off or on)
Washer fluid level sensor is less than MIN (washer fluid level sensor on)
1.0 or less
Washer fluid level sensor
Washer fluid level sensor is MIN or more (Washer fluid level sensor off)
B+
3R
Brake fluid level sensor signal
Brake fluid level sensor
Ignition is switched ON (engine off or on)
Brake fluid level sensor is less than MIN (brake fluid level sensor on)
1.0 or less
Brake fluid level sensor
Brake fluid level sensor is MIN or more (brake fluid level sensor off)
B+
3S
LIN communication
Current sensor
Terminal used for communication therefore determination based on terminal voltage is not possible.
3T
Horn switch control
Horn switch
Ignition is switched ON (engine off or on)
Horn switch is on (long press)
1.0 or less
Horn switch
Horn switch is off
B+
3U
Trunk unlatch switch signal (interior)
Trunk lid opener switch (interior)
Trunk lid opener switch (interior) is on (trunk lid opener switch (interior) is pressed)
1.0 or less
Trunk lid opener switch (interior)
Trunk lid opener switch (interior) is off (trunk lid opener switch (interior) is not pressed)
B+
3V*7
LIN communication
DC-DC converter
Terminal used for communication therefore determination based on terminal voltage is not possible.
3W
Hood latch switch signal
Hood latch switch
Hood is open
Approx. 9.0
Hood latch switch
Hood is closed
1.0 or less
3X
LIN communication
•  Auto-light sensor/rain sensor*8
•  Theft-deterrenet sensor*9
Terminal used for communication therefore determination based on terminal voltage is not possible.

*1  :Vehicles with smart city brake support (SCBS)
*2  :Vehicles with door lock switch
*3  :Vehicles with door lock link switch
*4  :Vehicles with theft-deterrent horn
*5  :Vehicles with washer fluid level sensor
*6  :Vehicles with trunk lid opener switch (interior)
*7  :Vehicles with i-stop system/without i-ELOOP
*8  :Vehicles with auto light system/auto wiper system
*9  :Vehicles with theft-deterrent siren
*10  :Vehicles with PTC heater