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 (LH). (See DASHBOARD UNDER COVER REMOVAL/INSTALLATION.)

4.  Set the bonnet release lever out of the way. (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*6
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
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*6
Lock/unlock input (passenger-side door lock-link switch)
Passenger-side door lock-link switch
Passenger-side door locked
With PLG system
Wave pattern (See Pattern 3.)
•  Passenger-side door lock-link switch
•  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)
Turn switch (LH) on
Front turn light (LH) flashes
Alternates between 1.0 or less and B+
•  Front turn light (LH)
•  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.
2.5
•  Door lock switch (passenger side)
•  Related wiring harnesses
Door lock switch (passenger side) is pressed to unlock.
1.0 or less
Other
5
1I
Front side turn light (RH) control
Front side turn light (RH)
Turn switch (RH) on
Front side 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
CAN_L
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
CAN_H
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
•  Related wiring harnesses
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
•  Seat warmer relay*1
•  Air intake actuator
•  Front blower relay
•  Rear blower relay
•  Rear window defroster relay
Seat warmer switch at ON*1
Ignition switch at ON
B+
•  Seat warmer relay*1
•  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
Power supply
ACC relay
Ignition switch at ACC position
B+
•  ACC relay
•  Related wiring harnesses
Other
1.0 or less
2A
Interior light power supply
ROOM 15 A fuse
Under any condition
B+
•  ROOM 15 A fuse
•  Related wiring harnesses
2B
Hazard power supply
HAZARD 15 A fuse
Under any condition
B+
•  HAZARD 15 A 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 control
Courtesy light (RH)
Within 30 min after any door is opened.
1.0 or less
•  Courtesy light (FR)
•  Related wiring harnesses
30 min or more after any door is opened.
B+
All doors closed
B+
2F
Power supply
Back-up light relay/position memory control module*3
Ignition switch at ON
B+
•  Back-up light relay
•  Position memory control module*3
•  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
Light control
Front side marker light/parking light (LH)
Light switch at TNS
B+
•  TNS relay
•  Related wiring harnesses
Light switch off
1.0 or less
2J
2K
Light control
Front side marker light/parking light (RH)
Light switch at TNS
B+
•  TNS relay
•  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
Check connector
Ignition switch at ON
B+
•  Check connector
•  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 25 A fuse
Under any condition
B+
•  D/L 25 A fuse
•  Related wiring harnesses
3A
3B
Serial communication
•  Keyless control module (with advanced keyless system)
•  Keyless receiver (with keyless entry system)
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
2.5
Other
5
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*4
Serial communication
Sunroof motor
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
3L
3M*6
Security light control
Instrument cluster
Security light on
1.0 or less
•  Instrument cluster
•  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 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.
2.5
•  Door lock switch (driver-side)
•  Related wiring harnesses
Door lock switch (driver side) is pressed to unlock.
1.0 or less
Other
5
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
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.
approx. 0.5
•  Steering angle sensor
•  Related wiring harnesses
Other
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
Front side turn light (LH) control
Front side turn light (LH)
Turn switch (LH) on
Front side 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
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
3AA
CAN_H
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
3AB
Ignition key illumination control
•  Steering lock unit (with advanced keyless system)
•  Ignition key illumination (with keyless entry system)
Ignition switch off and driver-side door opened.
1.0 or less
•  Ignition key illumination bulb
•  Related wiring harnesses
15 s or more after all doors closed.
B+
3AC*5
CAN_L
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
3AD*5
CAN_H
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
4A
BCM power supply
METER 10 A fuse
Ignition switch at ON
B+
•  METER 10 A fuse
•  Related wiring harnesses
Ignition switch off
1.0 or less
4B
Courtesy light control
Courtesy light (LH)
Within 30 min after any door is opened.
1.0 or less
•  Courtesy light (LH)
•  Related wiring harnesses
30 min or more after any door is opened.
B+
All doors closed
B+
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
Light switch at TNS position
B+
•  TNS relay
•  TAIL 10 A 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 15 A fuse
Ignition switch at ON
B+
•  R.WIPER 15 A fuse
•  Related wiring harnesses
Ignition switch off
1.0 or less
5B
5C
5D
Power supply
•  Keyless control module (with advanced keyless system)
•  Keyless receiver (with keyless entry system)
Under any condition
B+
•  Keyless control module (with advanced keyless system)
•  Keyless receiver (with keyless entry system)
•  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
Courtesy light power supply
Courtesy light (LH)
Under any condition
B+
•  Courtesy light (LH)
•  Related wiring harnesses
5G
5H
Interior light power supply
•  Key reminder switch
•  Ignition key illumination
Under any condition
B+
•  Key reminder switch
•  Ignition key illumination
•  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*5
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
Hazard warning switch on
1.0 or less
•  Hazard warning switch
•  Related wiring harnesses
Hazard warning switch off
B+
5N
Lock input (Driver-side door lock-link switch) (without advanced keyless entry and start system)
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) (with advanced keyless entry and start system)
•  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 (with advanced keyless system)
•  Key reminder switch (with keyless entry system)
Key inserted
B+
•  Steering lock unit (with advanced keyless system)
•  Key reminder switch (with keyless entry system)
•  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)
Light switch at TNS position
B+
•  TNS relay
•  BCM
•  Related wiring harnesses
Light switch off
1.0 or less
6E
6F
IG1
Combined sensor
Ignition switch at ON
B+
•  Combined sensor
•  Related wiring harnesses
Ignition switch off
1.0 or less
6G
CAN_L
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
6H
CAN_L
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
6I
CAN_H
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
6J
CAN_H
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
6K
6L*2
Inverter power supply
Inverter
Ignition switch at ACC
B+
•  Inverter
•  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
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*3
Front door switch (driver side) output signal
Position memory control module
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+
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
Liftgate is open.
(Liftgate latch switch on)
1.0 or less
•  Liftgate latch switch
•  Related wiring harnesses
Liftgate is closed.
(Liftgate latch switch off)
B+
6T*3
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*6
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
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
6W*6
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
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
Ignition switch at ON
B+
•  4WD control module
•  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
Position memory control power supply*3
Position memory control module
Under any condition
B+
•  Position memory control module
•  Related wiring harnesses
7I
Interior light control
Front map light
Within 30 min after any door is opened.
1.0 or less
•  Front map light
•  Center map light
•  Interior light
•  Related wiring harnesses
30 min or more after any door is opened.
B+
All doors closed
B+
7J
Interior light power supply
•  Front map light
•  Interior light
•  Cargo compartment light
Under any condition
B+
•  Front map light
•  Center map light
•  Interior light
•  Related wiring harnesses

*1  :With seat warmer system
*2  :With inverter
*3  :With seat position memory function
*4  :With sunroof system
*5  :Without advanced keyless system
*6  :With theft-deterrent system

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

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