BODY CONTROL MODULE (BCM) INSPECTION


id094000800300

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

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

3.  Remove the dashboard under cover (Driver side). (L.H.D.) (See DASHBOARD UNDER COVER REMOVAL/INSTALLATION.)

4.  Set the bonnet release lever out of the way. (L.H.D.) (See BONNET LATCH AND RELEASE LEVER REMOVAL/INSTALLATION.)

5.  Remove the BCM with the connector connected.

6.  Measure the voltage at each terminal is as indicated in the Terminal Voltage Tables.

•  If the voltage or continuity is not as specified in the Terminal Voltage Table, inspect the parts under “Inspection item (s)”.
―  If the system does not work properly even though the parts or related wiring harnesses do not have any malfunction, replace the BCM.


Terminal Voltage Table (Reference)

ac9uuw00000703

Terminal

Signal

Connected to

Measurement condition

Voltage (V)

Inspection item (s)

1A
Oil pressure switch signal
Oil pressure switch
Ignition switch at ON
When the engine is running (oil pressure switch on)
1.0 or less
•  Oil pressure switch
•  Related wiring harnesses
When the engine is not running (oil pressure switch off)
B+
1B*1
Bonnet latch switch signal
Bonnet latch switch
Bonnet open
(Bonnet latch switch off)
Wave pattern (See Pattern 2.)
•  Bonnet latch switch
•  Related wiring harnesses
Bonnet closed
(Bonnet latch switch on)
1.0 or less
1C*2, *14
Washer level signal
Washer fluid-level sensor
Ignition switch at ON
Washer level below MIN.
1.0 or less
•  Washer fluid-level sensor
•  Related wiring harnesses
Washer level above MIN.
B+
1D
Brake fluid level signal
Brake fluid level sensor
Ignition switch at ON
Brake fluid level below MIN.
1.0 or less
•  Brake fluid level sensor
•  Related wiring harnesses
Brake fluid level above MIN.
B+
1E*1
Lock/unlock input (passenger-side door lock-link switch)
•  Passenger-side door lock-link switch
•  PLG control module*3
Passenger-side door locked
With PLG system
Wave pattern (See Pattern 5.)
•  Passenger-side door lock-link switch
•  PLG control module*3
•  Related wiring harnesses
Without PLG system
Wave pattern (See Pattern 1.)
Passenger-side door unlocked
1.0 or less
1F
Front turn light (LH) control
•  Front turn light (LH)
•  Front side turn turn light (LH)*15
Turn switch (LH) on
Front turn light (LH) flashes
Alternates between 1.0 or less and B+
•  Front turn light (LH)
•  Front side turn turn light (LH)*15
•  Related wiring harnesses
Hazard warning switch on
Other
1.0 or less
1G
Front turn light (RH) control
Front turn light (RH)
Turn switch (RH) on
Front turn light (RH) flashes
Alternates between 1.0 or less and B+
•  Front turn light (RH)
•  Related wiring harnesses
Hazard warning switch on
Other
1.0 or less
1H
Lock/unlock signal
Door lock switch (passenger side)
Door lock switch (passenger side) is pressed to lock.
approx. 2.2
•  Door lock switch (passenger side)
•  Related wiring harnesses
Door lock switch (passenger side) is pressed to unlock.
1.0 or less
Other
approx. 4.6
1I
Front side turn turn light (RH) control
Front side turn turn light (RH)
Turn switch (RH) on
Front side turn turn light (RH) flashes
Alternates between 1.0 or less and B+
•  Front side turn light (RH)
•  Related wiring harnesses
Hazard warning switch on
Other
1.0 or less
1J*14
CAN_L
CAN system related module
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
1K
Parking brake switch signal
Parking brake switch
Ignition switch at ON
Parking brake switch on
1.0 or less
•  Parking brake switch
•  Related wiring harnesses
Parking brake switch off
B+
1L*14
CAN_H
CAN system related module
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
1M
Back-up light power supply
Back-up light relay
Ignition switch at ON
The selector lever is in the R position
B+
•  Back-up light relay
•  Back-up light
•  Related wiring harnesses
Other
1.0 or less
1N
Power supply
•  Air intake actuator
•  Front blower relay
•  Rear blower relay
•  Rear window defroster relay
Ignition switch at ON
B+
•  Air intake actuator
•  Front blower relay
•  Rear blower relay
•  Rear window defroster relay
•  Related wiring harnesses
Ignition switch off
1.0 or less
1O
Horn control
Horn relay
Transmitter LOCK button is pressed twice within 5 s.
B+→ 1.0 or less → B+
•  Horn relay
•  Related wiring harnesses
Other
B+
1P
ACC
ACC relay
Ignition switch at ACC
B+
•  ACC relay
•  Ignition switch
•  Related wiring harnesses
Ignition switch off
1.0 or less
2A
Interior light power supply
ROOM 15A fuse
Under any condition
B+
•  ROOM 15A fuse
•  Related wiring harnesses
2B
Hazard power supply
HAZARD 15A fuse
Under any condition
B+
•  HAZARD 15A fuse
•  Related wiring harnesses
2C
Courtesy light power supply
Courtesy light (RH)
Under any condition
B+
•  Courtesy light (RH)
•  Related wiring harnesses
2D
Rear washer motor power supply
Rear washer motor
Ignition switch at ON
B+
•  Ignition switch
•  Rear washer motor
•  Related wiring harnesses
Ignition switch off
1.0 or less
2E
Courtesy light (RH) control
Courtesy light (RH)
Courtesy light on by opening any door
Courtesy light off by closing all doors
Wave pattern (See Pattern 4.)
•  Courtesy light (RH)
•  Related wiring harnesses
2F
Power supply
•  Back-up light relay
•  TCM
Ignition switch at ON
B+
•  Back-up light relay
•  TCM
•  Related wiring harnesses
Ignition switch off
1.0 or less
2G
Signal GND
Body ground
Under any condition
1.0 or less
•  Related wiring harnesses
2H
Door lock control (passenger side)
Door lock actuator
Door lock actuator locking
1.0 or less → B+→ 1.0 or less
•  Door lock actuator (passenger side)
•  Related wiring harnesses
Other
1.0 or less
2I*4
Light control
Rear fog light relay
Light switch at TNS
B+
•  Rear fog light relay
•  Related wiring harnesses
Light switch off
1.0 or less
2J
2K
Light control
Parking light
Light switch at TNS
B+
•  Parking light
•  Related wiring harnesses
Light switch off
1.0 or less
2L
Door unlock control (passenger side)
Door lock actuator
Door lock actuator unlocking
1.0 or less → B+→ 1.0 or less
•  Door lock actuator (passenger side)
•  Related wiring harnesses
Other
1.0 or less
2M
IG1
DSC/RSC HU/CM
Ignition switch at ON
B+
•  DSC/RSC HU/CM
•  Related wiring harnesses
Ignition switch off
1.0 or less
2N
Power GND
Body ground
Under any condition
1.0 or less
•  Related wiring harnesses
2O
Rear washer motor control
Rear washer motor
Ignition switch at ON
Rear washer switch on
1.0 or less
•  Rear washer motor
•  Related wiring harnesses
Rear washer switch off
B+
2P
Power door lock power supply
D/L 25A fuse
Under any condition
B+
•  D/L 25A fuse
•  Related wiring harnesses
3A
Parking brake switch output signal
Audio unit / car-navigation unit
Ignition switch at ON
Parking brake switch on
1.0 or less
•  Audio unit / car-navigation unit
•  Related wiring harnesses
Parking brake switch off
B+
3B
Serial communication
•  Keyless control module*6
•  Keyless receiver*12
•  Auto light / wiper control module*13
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
3C
3D
Turn switch input (LH)
Turn switch
Ignition switch at ON
Turn switch at left position
1.0 or less
•  Turn switch
•  Related wiring harnesses
Other
B+
3E
Driver-side door key cylinder switch signal
Driver-side door key cylinder switch
At the moment key cylinder is unlocked
1.0 or less
•  Driver-side door key cylinder switch
•  Related wiring harnesses
At the moment key cylinder is locked
approx. 2.1
Other
approx. 4.6
3F
3G
Turn switch input (RH)
Turn switch
Ignition switch at ON
Turn switch at right position
1.0 or less
•  Turn switch
•  Related wiring harnesses
Other
B+
3H
3I
3J
Serial communication
Power window main switch
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
3K*5
Serial communication
Sunroof motor
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
3L
3M*1
Security light control
•  Instrument cluster
•  Theft-deterrent system
Security light on
1.0 or less
•  Instrument cluster
•  Theft-deterrent system
•  Related wiring harnesses
Security light off
B+
3N
Steering angle sensor GND
Steering angle sensor
Under any condition
1.0 or less
•  Related wiring harnesses
3O
3P
Rear wiper switch signal (on)
Rear wiper and washer switch
Ignition switch at ON
Rear wiper switch at ON position
1.0 or less
•  Rear wiper and washer switch
•  Related wiring harnesses
Other
B+
3Q
Rear wiper switch signal (INT)
Rear windshield wiper and washer switch
Ignition switch at ON
Rear wiper switch at INT position
1.0 or less
•  Rear wiper and washer switch
•  Related wiring harnesses
Other
B+
3R
Lock/unlock signal
Door lock switch (driver side)
Door lock switch (driver side) is pressed to lock.
approx. 2.1
•  Door lock switch (driver-side)
•  Related wiring harnesses
Door lock switch (driver side) is pressed to unlock.
1.0 or less
Other
approx. 4.6
3S
Steering angle sensor signal (B)
Steering angle sensor
Turn the steering wheel to the left and right.
Alternates between 4.00—4.75 and 0.25—0.75
•  Related wiring harnesses
3T
Steering angle sensor signal (C)
Steering angle sensor
Turn the steering wheel to the left and right.
Alternates between 4.00—4.75 and 0.25—0.75
•  Related wiring harnesses
3U
Horn switch signal
•  Horn switch
•  Clock spring
Horn switch off
B+
•  Horn switch
•  Clock spring
•  Related wiring harnesses
Horn switch on
1.0 or less
3V
Steering angle sensor power supply
Steering angle sensor
Fifteen hours after key removed and all doors closed.
Wave pattern (See Pattern 3.)
•  Steering angle sensor
•  Related wiring harnesses
Other
approx. 5
3W
Steering angle sensor signal (A)
Steering angle sensor
Turn the steering wheel to the left and right.
Alternates between 4.00—4.75 and 0.25—0.75
•  Related wiring harnesses
3X
Steering angle sensor signal (Z)
Steering angle sensor
Turn the steering wheel to the left and right.
Alternates between 4.00—4.75 and 0.25—0.75
•  Related wiring harnesses
3Y*14
Front side turn turn light (LH) control
Front side turn turn light (LH)
Turn switch (LH) on
Front side turn turn light (LH) flashes
Alternates between 1.0 or less and B+
•  Front side turn light (LH)
•  Related wiring harnesses
Hazard warning switch on
Other
1.0 or less
3Z
CAN_L
CAN system related module
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
3AA
CAN_H
CAN system related module
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
3AB
Ignition key illumination control
•  Steering lock unit*6
•  Ignition key illumination*12
Ignition switch off and driver-side door opened.
1.0 or less
•  Steering lock unit*6
•  Ignition key illumination*12
•  Ignition key illumination bulb
•  Related wiring harnesses
15 s or more after all doors closed.
B+
3AC*6, *14
CAN_L
CAN system related module
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
3AD*6, *14
CAN_H
CAN system related module
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
4A
BCM power supply
METER 10 A fuse
Under any condition
B+
•  METER 10 A fuse
•  Related wiring harnesses
4B
Courtesy light (LH) control
Courtesy light (LH)
Courtesy light on by opening any door
Courtesy light off by closing all doors
Wave pattern (See Pattern 4.)
•  Courtesy light (LH)
•  Related wiring harnesses
4C
4D
IG1
SAS 7.5 A fuse
Ignition switch at ON
B+
•  SAS 7.5 A fuse
•  Related wiring harnesses
Ignition switch off
1.0 or less
4E
TNS signal
•  TNS relay
•  TAIL 10 A fuse
Light switch at TNS position
B+
•  TNS relay
•  TAIL 10A fuse
•  Related wiring harnesses
Light switch off
1.0 or less
4F
ACC
MIRROR 7.5 A fuse
Ignition switch at ACC
B+
•  MIRROR 7.5 A fuse
•  Related wiring harnesses
Ignition switch off
1.0 or less
5A
IG2
R.WIPER 15A fuse
Ignition switch at ON
B+
•  R.WIPER 15A fuse
•  Related wiring harnesses
Ignition switch off
1.0 or less
5B
5C
5D
Power supply
•  Keyless control module*6
•  Keyless receiver, key reminder switch, ignition key illumination*12
Under any condition
B+
•  Keyless control module*6
•  Keyless receiver, key reminder switch, ignition key illumination*12
•  Related wiring harnesses
5E
Door unlock control (driver side)
Door lock actuator
Door lock actuator unlocking
1.0 or less → B+→ 1.0 or less
•  Door lock actuator (driver side)
•  Related wiring harnesses
Other
1.0 or less
5F
Power supply
•  Audio unit
•  Auto light/wiper control module
Under any condition
B+
•  Bluetooth unit
•  Auto light/wiper control module
•  Related wiring harnesses
5G
5H
Interior light power supply
•  Courtesy light (LH)
•  Front climate control module
•  Information control module
•  Instrument cluster
Under any condition
B+
•  Courtesy light (LH)
•  Interior light
•  Courtesy light (LH)
•  Front climate control module
•  Information control module
•  Instrument cluster
•  Related wiring harnesses
5I
Door lock control (driver side)
Door lock actuator
Door lock actuator locking
1.0 or less → B+→ 1.0 or less
•  Door lock actuator (driver side)
•  Related wiring harnesses
Other
1.0 or less
5J
Back-up light signal
Audio unit
Ignition switch at ON
The selector lever is in the R position
B+
•  Audio unit
•  Related wiring harnesses
Other
1.0 or less
5K
Unlock input (Driver-side door lock-link switch)
Driver-side door lock-link switch
Driver-side door locked
Wave pattern (See Pattern 2.)
•  Driver-side door lock-link switch
•  Related wiring harnesses
Driver-side door unlocked
1.0 or less
5L
IG2
A/C 7.5 A fuse
Ignition switch at ON
B+
•  A/C 7.5 A fuse
•  Battery
•  Related wiring harnesses
Ignition switch off
1.0 or less
5M
Hazard warning switch signal
•  Hazard warning switch
•  Theft-deterrent control module*1
Hazard warning switch on
1.0 or less
•  Hazard warning switch
•  Theft-deterrent control module*1
•  Related wiring harnesses
Hazard warning switch off
approx. 4.6
5N
Lock input (Driver-side door lock-link switch)*12
Driver-side door lock-link switch
Driver-side door locked
1.0 or less
•  Driver-side door lock-link switch
•  Related wiring harnesses
Driver-side door unlocked
Wave pattern (See Pattern 2.)
Lock input (Driver-side door lock-link switch)*6
•  Driver-side door lock-link switch
•  Keyless control module
Driver-side door locked
1.0 or less
•  Driver-side door lock-link switch
•  Keyless control module
•  Related wiring harnesses
Driver-side door unlocked
approx. 4.6
5O
Rear washer switch signal
Rear wiper and washer switch
Ignition switch at ON
Rear washer switch on
1.0 or less
•  Rear wiper and washer switch
•  Related wiring harnesses
Rear washer switch off
B+
5P
Key reminder switch signal
•  Steering lock unit*6
•  Key reminder switch*12
Key inserted
B+
•  Steering lock unit*6
•  Key reminder switch*12
•  Related wiring harnesses
Key removed
1.0 or less
6A
Rear turn light (RH) control
Rear turn light (RH)
Turn switch (RH) on
Rear turn light (RH) flashes
Alternates between 1.0 or less and B+
•  Rear turn light (RH)
•  Related wiring harnesses
Hazard warning switch on
Other
1.0 or less
6B
Light control
Taillight (RH)
Light switch at TNS position
B+
•  TNS relay
•  BCM
•  Related wiring harnesses
Light switch off
1.0 or less
6C
Rear turn light (LH) control
Rear turn light (LH)
Turn switch (LH) on
Rear turn light (LH) flashes
Alternates between 1.0 or less and B+
•  Rear turn light (LH)
•  Related wiring harnesses
Hazard warning switch on
Other
1.0 or less
6D
Light control
•  Taillight (LH)
•  License plate light
Light switch at TNS position
B+
•  TNS relay
•  BCM
•  Related wiring harnesses
Light switch off
1.0 or less
6E
6F
6G
CAN_L
CAN system related module
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
6H*7
CAN_L
CAN system related module
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
6I
CAN_H
CAN system related module
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
6J*7
CAN_H
CAN system related module
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
6K
6L*9, *15
ACC
Position memory control module
Ignition switch at ACC
B+
•  Position memory control module
•  Related wiring harnesses
Ignition switch off
1.0 or less
6M
Front door switch (passenger side) signal
Front door switch (passenger side)
Front door (passenger side) open
(Front door switch (passenger side) on)
1.0 or less
•  Front door switch (passenger side)
•  Related wiring harnesses
Front door (passenger side) closed
(Front door switch (passenger side) off)
B+
6N*8
IG2
Seat warmer unit
Ignition switch at ON
B+
•  Seat warmer unit
•  Related wiring harnesses
Ignition switch off
1.0 or less
6O
Front door switch (driver side) input signal
Front door switch (driver side)
Front door (driver side) open
(Front door switch (driver side) on)
1.0 or less
•  Front door switch (driver side)
•  Related wiring harnesses
Front door (driver side) closed
(Front door switch (driver side) off)
B+
6P
6Q
Rear door switch (RH) signal
Rear door switch (RH)
Any rear doors open
(Rear door switch on)
1.0 or less
•  Rear door switches
•  Related wiring harnesses
All rear doors closed
(Rear door switch off)
B+
6R
Rear door switch (LH) signal
Rear door switch (LH)
Any rear doors open
(Rear door switch on)
1.0 or less
•  Rear door switches
•  Related wiring harnesses
All rear doors closed
(Rear door switch off)
B+
6S
Liftgate latch switch signal
•  Liftgate latch switch
•  PLG control module*3
Liftgate is open.
(Liftgate latch switch on)
1.0 or less
•  Liftgate latch switch
•  PLG control module*3
•  Related wiring harnesses
Liftgate is closed.
(Liftgate latch switch off)
B+
6T*9
Position memory control module communication
Position memory control module
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
6U*1
Lock/unlock input (rear door lock-link switch (LH))
Rear door lock-link switch (LH)
Rear door (LH) locked
Wave pattern (See Pattern 1.)
•  Rear door lock-link switch (LH)
•  Related wiring harnesses
Rear door (LH) unlocked
1.0 or less
6V
Back-up light control
•  Back-up light
•  Parking sensor control module*10
Ignition switch at ON
The selector lever is in the R position
B+
•  Back-up light relay
•  Back-up light
•  Parking sensor control module*10
•  Related wiring harnesses
Other
1.0 or less
6W*1
Lock/unlock input (rear door lock-link switch (RH)
Rear door lock-link switch (RH)
Rear door (RH) locked
Wave pattern (See Pattern 1.)
•  Rear door lock-link switch (RH)
•  Related wiring harnesses
Rear door (RH) unlocked
1.0 or less
6X
7A
Rear wiper control
Rear wiper motor
Ignition switch at ON
Rear wiper moving
1.0 or less
•  Rear wiper motor
•  Related wiring harnesses
Rear wiper stopped
B+
7B
Power supply
•  4WD control module*7
•  Parking sensor control module*10
•  Position memory control module*9
•  BSM control module (LH, RH)*11
Ignition switch at ON
B+
•  4WD control module*7
•  Parking sensor control module*10
•  Position memory control module*9
•  BSM control module (LH, RH)*11
•  Related wiring harnesses
Ignition switch off
1.0 or less
7D
Door lock control
Door lock actuators
Press the lock button on the door lock switch.
1.0 or less → B+→ 1.0 or less
•  Door lock actuators
•  Related wiring harnesses
Other
1.0 or less
7F
Rear wiper power supply
Rear wiper motor
Ignition switch at ON
B+
•  Ignition switch
•  Rear wiper motor
•  Related wiring harnesses
Ignition switch off
1.0 or less
7G
Door unlock control
Door lock actuators
Press the lock button on the door lock switch.
1.0 or less → B+→ 1.0 or less
•  Door lock actuators
•  Related wiring harnesses
Other
1.0 or less
7H*9
Position memory control power supply
Position memory control module
Under any condition
B+
•  Position memory control module
•  Related wiring harnesses
7I
Interior light control
Front map light
Interior light on by opening any door
Interior light off by closing all doors
Wave pattern (See Pattern 4.)
•  Front map light
•  Related wiring harnesses
7J
Interior light power supply
•  Front map light
•  Interior light
•  Cargo compartment light
•  Theft-deterrent siren
•  PLG control module*3
Under any condition
B+
•  Front map light
•  Interior light
•  Cargo compartment light
•  Theft-deterrent siren
•  PLG control module*3
•  Related wiring harnesses

*1  :With theft-deterrent system
*2  :With washer fluid-level sensor
*3  :With PLG system
*4  :With rear fog light
*5  :With sunroof system
*6  :With advanced keyless entry and start system
*7  :With 4WD
*8  :With seat warmer
*9  :With memory power seat
*10  :With parking sensor
*11  :With BSM system
*12  :Without advanced keyless entry and start system
*13  :With auto wiper system
*14  :L.H.D.
*15  :R.H.D.

Generated pulse (reference)


Pattern 1

ac9uuw00003072
•  Terminal:
―  Lock/unlock input (passenger-side door lock-link switch): 1E (+) ↔ body ground (-)
―  Lock/unlock input (rear door lock-link switch (LH)): 6U (+) ↔ body ground (-)
―  Lock/unlock input (rear door lock-link switch (RH): 6W (+) ↔ body ground (-)
•  Oscilloscope setting: 1 V/DIV (Y), 1 ms/DIV (X), DC range


Pattern 2

ac9uuw00003073
•  Terminal:
―  Bonnet latch switch signal: 1B (+) ↔ body ground (-)
―  Unlock input (Driver-side door lock-link switch): 5K (+) ↔ body ground (-)
―  Lock input (Driver-side door lock-link switch): 5N (+) ↔ body ground (-)
•  Oscilloscope setting: 1 V/DIV (Y), 1 ms/DIV (X), DC range


Pattern 3

ac9uuw00003074
•  Terminal: 3V (+) ↔ body ground (-)
•  Oscilloscope setting: 1 V/DIV (Y), 200 µs/DIV (X), DC range


Pattern 4

ac9uuw00003075
•  Terminal:
―  Courtesy light (LH) control: 2E (+) ↔ body ground (-)
―  Courtesy light (RH) control: 4B (+) ↔ body ground (-)
―  Interior light control: 7I (+) ↔ body ground (-)
•  Oscilloscope setting: 5 V/DIV (Y), 5 ms/DIV (X), DC range


Pattern 5

ac9wzw00001453
•  Terminal:
―  Lock/unlock input (passenger-side door lock-link switch): 1E (+) ↔ body ground (-)
•  Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range