BODY CONTROL MODULE (BCM) INSPECTION


id094000800300

1. Measure the voltage or inspect for continuity according to the 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.

Terminal Voltage Table (Reference)

Terminal

Signal name

Connected to

Measured condition

Voltage (V)/Continuity

Inspection item(s)

1A
Trunk lid/liftgate lock control
• Trunk lid opener (4SD)
• Liftgate lock actuator (5HB, WGN)
Lock actuator locking
1.0 or less → B+ → 1.0 or less
• Trunk lid opener (4SD)
• Liftgate lock actuator (5HB, WGN)
• Related wiring harnesses
Other
1.0 or less
1C
Trunk lid/liftgate unlock control
• Trunk lid opener (4SD)
• Liftgate lock actuator (5HB, WGN)
Lock actuator unlocking
1.0 or less → B+ → 1.0 or less
• Trunk lid opener (4SD)
• Liftgate lock actuator (5HB, WGN)
• Related wiring harnesses
Other
1.0 or less
1F
Door switch signal (LR)
Door switch (LR)
Door open (LR)
(Door switch on)
1.0 or less
• Door switch (LR)
• Related wiring harnesses
Doors closed (LR)
(Door switch off)
B+
1G
Headlight leveling (manual) GND
Headlight leveling actuator
Under any condition: Inspect for continuity to headlight leveling actuator.
Continuity detected
• Related wiring harnesses
1I
Interior light control
• Map light
• Interior light

Within 5 min after any door is opened.

1.0 or less
• Map light
• Interior light
• Related wiring harnesses

5 min or more after any door is opened.

B+
All doors closed
B+
1K
Interior light power supply
• Map light
• Interior light
Under any condition
B+
• Map light
• Interior light
• Related wiring harnesses
1M
Brake light power supply
Brake light
Stop light switch is ON
B+
• Brake light
• Related wiring harnesses
Stop light switch is OFF
1.0 or less
1O
Back-up light power supply
Back-up light
Back-up light switch is ON
B+
• Back-up light
• Related wiring harnesses
Back-up light switch is OFF
1.0 or less
1P
Taillight power supply
Taillight
TNS switch is ON
B+
• Taillight
• Related wiring harnesses
TNS switch is OFF
1.0 or less
2A
Fuel level signal 2 output
Instrument cluster
Under any condition: Inspect for continuity to instrument cluster.
Continuity detected
• Related wiring harnesses
2B
Fuel level signal 1 output
Instrument cluster
Under any condition: Inspect for continuity to instrument cluster.
Continuity detected
• Related wiring harnesses
2C
Woofer signal 1
Woofer
Under any condition: Inspect for continuity to woofer.
Continuity detected
• Related wiring harnesses
2D
Rear wiper motor power supply
Rear wiper motor
Rear wiper switch is ON
B+
• Rear wiper motor
• Related wiring harnesses
Rear wiper switch is OFF
1.0 or less
2E
Woofer signal 2
Woofer
Under any condition: Inspect for continuity to woofer.
Continuity detected
• Related wiring harnesses
2F
• Trunk compartment light signal (4SD)
• cargo compartment light switch signal (5HB, WGN)
• Trunk compartment light switch (4SD)
• Cargo compartment light switch (5HB, WGN)
Trunk lid/liftgate is open.
(Switch on)
1.0 or less
• Trunk compartment light switch (4SD)
• Cargo compartment light switch (5HB, WGN)
• Related wiring harnesses
Trunk lid/liftgate is closed.
(Switch off)
B+
2G
Woofer GND
GND
Under any condition: Inspect for continuity to GND.
Continuity detected
• Related wiring harnesses
2H
Theft-deterrent siren signal
Theft-deterrent siren
Theft-deterrent system arming
See Fig 1
• Theft-deterrent siren
• Related wiring harnesses
2I
Rear turn light (RH) control
Rear turn light (RH)
Turn switch (RH) is ON
Alternates between 1.0 or less and B+
• Rear turn light (RH)
• Related wiring harnesses
Turn switch is OFF
1.0 or less
2J
Autostop switch signal
Autostop switch
Rear wiper moving
B+
• Autostop switch (rear wiper motor)
• Related wiring harnesses
Rear wiper stopped
1.0 or less
2K
Rear turn light (LH) control
Rear turn light (LH)
Turn switch (LH) is ON
Alternates between 1.0 or less and B+
• Rear turn light (LH)
• Related wiring harnesses
Turn wiper switch is OFF
1.0 or less
2L
Trunk lid lock/unlock signal
Trunk lid key cylinder switch
At the moment key cylinder is unlocked
1.0 or less
• Trunk lid key cylinder switch
• Related wiring harnesses
Other
B+
2M
Sunroof power supply
Sunroof switch
Under any condition
B+
• Sunroof switch
• Battery
2N
Intruder sensor (rear) power supply
Intruder sensor (rear)
(WGN only)
Theft-deterrent system pre-arming or arming
B+
• Related wiring harnesses
Other
1.0 or less
2O
Auto leveling control module signal
Auto leveling control module
Under any condition: Inspect for continuity to auto leveling control module.
Continuity detected
• Related wiring harnesses
2P
Intruder sensor signal
Intruder sensor (rear)
(WGN only)
Theft-deterrent system pre-arming, arming, or alarm
B+
• Intruder sensor (rear)
• Related wiring harnesses
Intruder sensor detects intrusion
B+ → 1.0 or less → B+
Theft-deterrent system: Other
1.0 or less
3A
Power supply
(rear wiper)
R.WIP 10 A fuse
Ignition switch is ON position.
B+
• R.WIP 10 A fuse
• Battery
3B
Turn light (RH) signal output
Instrument cluster
Turn switch (RH) is ON
Alternates between 1.0 or less and B+
• Related wiring harnesses
Turn switch is OFF
1.0 or less
3C
Rear washer switch signal
Rear washer switch
Rear washer switch is ON
1.0 or less
• Rear washer switch
• Related wiring harnesses
Rear washer switch is OFF
B+
3D
Turn light (LH) signal output
Instrument cluster
Turn switch (LH) is ON
Alternates between 1.0 or less and B+
• Related wiring harnesses
Turn switch is OFF
1.0 or less
3E
Ignition key illumination control
Ignition key illumination
Ignition switch off and driver-side door opened.
1.0 or less
• Ignition key illumination
• Related wiring harnesses

15 s or more after driver-side door closed.

B+
3F
Power supply
A/C 10 A fuse
Ignition switch is ON position.
B+
• A/C 10 A fuse
• Battery
3G
Power supply
D/L 30 A fuse
Under any condition
B+
• D/L 30 A fuse
• Battery
3H
Headlight leveling (manual) GND
Headlight leveling switch
Under any condition: Inspect for continuity to headlight leveling switch.
Continuity detected
• Related wiring harnesses
3I
Power supply
(PAD)
PAD indicator light
PAD cut-off switch is ON position.
B+
• R.WIP 10 A fuse
• Battery
Other
1.0 or less
3J
Power supply
ROOM 15 A fuse
Under any condition
B+
• ROOM 15 A fuse
• Battery
3K
Back-up light switch signal
Car-navigation unit
Back-up light switch is ON
B+
• Related wiring harnesses
Back-up light switch is OFF
1.0 or less
3L
Power supply
METER 15 A fuse
Ignition switch is ON position.
B+
• METER 15 A fuse
• Battery
4A
Power supply
SAS 10 A fuse
Ignition switch is ON position.
B+
• SAS 10 A fuse
• Battery
4B
Power supply
(headlight leveling switch)
Headlight leveling switch
TNS switch is ON.
B+
• Related wiring harnesses
4C
Turn switch input (LH)
Turn switch
Turn switch at left position
1.0 or less
• Turn switch
• Related wiring harnesses
Other
B+
4D
Security light signal
Instrument cluster
Under any condition: Inspect for continuity to Instrument cluster.
Continuity detected
• Related wiring harnesses
4E
Turn switch input (RH)
Turn switch
Turn switch at right position
1.0 or less
• Turn switch
• Related wiring harnesses
Other
B+
4F
Horn switch input
Horn switch
Horn switch is ON
1.0 or less
• Horn switch
• Related wiring harnesses
Other
B+
4G
Hazard switch input
Hazard switch
Hazard switch is ON
1.0 or less
• Hazard switch
• Related wiring harnesses
Other
B+
4H
Vehicle speed signal output
• Audio unit
• Wiper switch (without auto wiper)
• Auto light-off control module
• Car-navigation unit
Under any condition: Inspect for continuity to related module.
Continuity detected
• Related wiring harnesses
4I
Rear wiper (INT) switch signal
Rear wiper switch
Rear wiper switch is INT position.
1.0 or less
• Rear wiper switch
• Related wiring harnesses
Rear wiper switch is OFF
B+
4J
CAN_L
-
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
-
• Related wiring harnesses
4K
Rear wiper switch signal
Rear wiper switch
Rear wiper switch is ON position.
1.0 or less
• Rear wiper switch
• Related wiring harnesses
Rear wiper switch is OFF
B+
4L
CAN_H
-
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
-
• Related wiring harnesses
4M
Door switch signal (driver-side) output
Instrument cluster
Door open (driver-side)
(Door switch on)
1.0 or less
• Door switch (driver-side)
• Related wiring harnesses
Doors closed (driver-side)
(Door switch off)
B+
4N
DLC-2
DLC-2
Under any condition: Inspect for continuity to DLC-2.
Continuity detected
• Related wiring harnesses
4O
Door switch signal (except driver-side) output
Instrument cluster
Door open (except driver-side)
(Door switch on)
1.0 or less
• Door switch (except driver-side)
• Related wiring harnesses
Doors closed (except driver-side)
(Door switch off)
B+
4P
Key reminder switch signal
• Steering lock unit (with advanced keyless system)
• Ignition switch (with keyless entry system)
Key inserted
B+
• Steering lock unit (with advanced keyless system)
• Ignition switch (with keyless entry system)
• Related wiring harnesses
Key removed
1.0 or less
5A
Fuel level signal 2 input
Fuel gauge sender unit
Under any condition: Inspect for continuity to fuel gauge sender unit.
Continuity detected
• Related wiring harnesses
5B
Fuel level signal 1 input
Fuel gauge sender unit
Under any condition: Inspect for continuity to fuel gauge sender unit.
Continuity detected
• Related wiring harnesses
5C
Woofer signal 1
Audio amplifier
Under any condition: Inspect for continuity to audio amplifier.
Continuity detected
• Related wiring harnesses
5D
Woofer signal 2
Audio amplifier
Under any condition: Inspect for continuity to audio amplifier.
Continuity detected
• Related wiring harnesses
5E
Woofer GND
GND
Under any condition: Inspect for continuity to GND.
Continuity detected
• Related wiring harnesses
6A
Door unlock control
Door lock actuator
Door lock actuator unlocking
1.0 or less → B+ → 1.0 or less
• Door lock actuator
• Related wiring harnesses
Other
1.0 or less
6B
Door lock control
Door lock actuator
Door lock actuator locking
1.0 or less → B+ → 1.0 or less
• Door lock actuator
• Related wiring harnesses
Other
1.0 or less
6D
GND
(headlight leveling switch)
GND
Under any condition: Inspect for continuity to GND.
Continuity detected
• Related wiring harnesses
6F
Courtesy light control
Courtesy light

Within 5 min after any door is opened.

1.0 or less
• Courtesy light
• Related wiring harnesses

5 min or more after any door is opened.

B+
All doors closed
B+
6G
Double lock control
Door lock actuator
Lock actuator double-locking (Transmitter LOCK button pressed twice within 5 s)
1.0 or less → B+ → 1.0 or less
• Door lock actuator
• Related wiring harnesses
Other
1.0 or less
6H
Courtesy light power supply
Courtesy light
Under any condition
B+
• Courtesy light
• Related wiring harnesses
6I
Power supply
• Position memory control module
• Rain sensor
• Power window main switch
4WD control module
Ignition switch is ON position.
B+
• Related wiring harnesses
6J
Brake signal
Brake switch
Stop light switch is ON
B+
Brake switch
Stop light switch is OFF
1.0 or less
7A
Signal GND
GND
Under any condition: Inspect for continuity to GND.
Continuity detected
• Related wiring harnesses
7B
Door switch signal (driver-side)
Door switch (driver-side)
Door open (driver-side)
(Door switch on)
1.0 or less
• Door switch (driver-side)
• Related wiring harnesses
Doors closed (driver-side)
(Door switch off)
B+
7C
Lock input (Driver-side door lock-link switch)
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
5
7D
Door switch signal (RR)
Door switch (RR)
Door open (RR)
(Door switch on)
1.0 or less
• Door switch (RR)
• Related wiring harnesses
Doors closed (RR)
(Door switch off)
B+
7E
Unlock input (Driver-side door lock-link switch)
Driver-side door lock-link switch
Driver-side door locked
5
• Driver-side door lock-link switch
• Related wiring harnesses
Driver-side door unlocked
1.0 or less
7F
Door switch signal (passenger-side)
Door switch (passenger-side)
Door open (passenger-side)
(Door switch on)
1.0 or less
• Door switch (passenger-side)
• Related wiring harnesses
Doors closed (passenger-side)
(Door switch off)
B+
7G
Unlock input (except driver-side door lock-link switch)
Driver-side door lock-link switch
Except driver-side door locked
5
• Except driver-side door lock-link switch
• Related wiring harnesses
Except driver-side door unlocked
1.0 or less
7H
Key reminder switch signal output
Keyless control module (with advanced keyless system)
Key inserted
B+
• Related wiring harnesses
Key removed
1.0 or less
7I
Keyless control module communication
Keyless control module
Under any condition: Inspect for continuity to keyless control module.
Continuity detected
• Related wiring harnesses
7J
Lock/unlock input
Driver-side door key cylinder switch
At the moment key cylinder is locked
2.5
• Driver-side door key cylinder switch
• Related wiring harnesses
At the moment key cylinder is unlocked
1.0 or less
At the moment key cylinder is neutral position
5
7K
Intruder sensor signal
Intruder sensor (front)
Theft-deterrent system pre-arming, arming, or alarm
B+
• Intruder sensor (front)
• Related wiring harnesses
Intruder sensor detects intrusion
B+ → 1.0 or less → B+
Theft-deterrent system: Other
1.0 or less
7L
Intruder sensor (front) power supply
Intruder sensor (front)
Theft-deterrent system pre-arming or arming
B+
• Intruder sensor (front)
• Related wiring harnesses
Other
1.0 or less
7N
SAS control module signal
SAS control module
Under any condition: Inspect for continuity to SAS control module.
Continuity detected
• Related wiring harnesses
7O
Power window main switch communication
Power window main switch
Under any condition: Inspect for continuity to power window main switch.
Continuity detected
• Related wiring harnesses
7P
CAN_H
-
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
-
• Related wiring harnesses
7Q
Position memory control module communication
Position memory control module
Under any condition: Inspect for continuity to position memory control module.
Continuity detected
• Related wiring harnesses
7R
CAN_L
-
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
-
• Related wiring harnesses
7T
Vehicle speed signal output
Position memory control module
Under any condition: Inspect for continuity to power window main switch.
Continuity detected
• Related wiring harnesses
7U
Power supply
SAS control module
Ignition switch is ON position.
B+
• Related wiring harnesses
8A
Power GND
GND
Under any condition: Inspect for continuity to GND.
Continuity detected
• Related wiring harnesses
8B
Power supply
• Auto leveling control module
• TCM
• Back-up light switch
• Cooling fan relay
• HO2S
4WD control module
Ignition switch is ON position.
B+
• Related wiring harnesses
8C
Brake signal output
PCM
Stop light switch is ON
B+
Brake switch
Stop light switch is OFF
1.0 or less
8D
Brake signal output (MZR-CD (RF-Turbo))
• ABS HU/CM
• DSC HU/CM
• TCM
Stop light switch is ON
B+
Brake switch
Stop light switch is OFF
1.0 or less
8F
Power supply
• ABS HU/CM
• DSC HU/CM
Ignition switch is ON position.
B+
• Related wiring harnesses
8H
Front turn light (RH) control
Front turn light (RH)
Turn switch (RH) is ON
Alternates between 1.0 or less and B+
• Front turn light (RH)
• Related wiring harnesses
Turn switch is OFF
1.0 or less
8J
Front turn light (LH) control
Front turn light (LH)
Turn switch (LH) is ON
Alternates between 1.0 or less and B+
• Front turn light (LH)
• Related wiring harnesses
Turn switch is OFF
1.0 or less
8K
Power supply
HAZARD 10 A fuse
Under any condition
B+
• HAZARD 10 A fuse
• Battery
8L
Power supply
A/C relay
Ignition switch is ON position.
B+
• Related wiring harnesses
8M
Bonnet switch signal
Bonnet switch
Bonnet open
(Bonnet switch off)
B+
• Bonnet switch
• Related wiring harnesses
Bonnet closed
(Bonnet switch on)
1.0 or less
8N
Rear washer motor control
Rear washer motor
Rear washer switch is ON
1.0 or less
• Rear washer switch
• Rear washer motor
• Related wiring harnesses
Rear washer switch is OFF
B+
8P
Back-up switch signal input
• Back-up light switch (MTX)
• TR switch (ATX)
Shift to reverse
B+
• Back-up light switch (MTX)
• TR switch (ATX)
• Related wiring harnesses
Other
1.0 or less
9A
CAN_L
-
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
-
• Related wiring harnesses
9B
Vehicle speed signal input
• ABS HU/CM
• DSC HU/CM
Under any condition: Inspect for continuity to ABS HU/CM or DSC HU/CM.
Continuity detected
• Related wiring harnesses
9C
CAN_L
-
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
-
• Related wiring harnesses
9D
CAN_L
-
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
-
• Related wiring harnesses
9E
CAN_H
-
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
-
• Related wiring harnesses
9F
CAN_H
-
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
-
• Related wiring harnesses
9G
CAN_H
-
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.
-
• Related wiring harnesses
9H
Check connector
Check connector
Under any condition: Inspect for continuity to Check connector.
Continuity detected
• Related wiring harnesses
9J
Horn relay control
Horn relay
Horn switch is ON
1.0 or less
• Horn relay
• Related wiring harnesses
Other
B+
9K
Power supply
(headlight leveling switch)
Headlight leveling switch
TNS switch is ON.
B+
• Related wiring harnesses
9L
Security light signal
PCM
Under any condition: Inspect for continuity to PCM.
Continuity detected
• Related wiring harnesses

*1 :
5HB, WGN only
*2 :
With immobilizer system

FIG 1 (Inspection Using an Oscilloscope (Reference))

Intruder sensor signal

• Terminal connected: 5F (+)-Negative battery terminal
• Oscilloscope setting: 2 V/DIV (Y): 100 ms/DIV (X), DC range
• Measurement condition: Theft-deterrent system arming.