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51-2
BODY CONTROL MODULE SYSTEM
BODY
CONTROL
MODULE
(BCM)
Connector
B9
B3
A4
A5
C1
A13
E5
A5
F10
C2
Door
unlock
relay
control
F9
E4
A12
LT GRN
0.35
Door
lock
relay
control
Rear
window
wiper
switch
signal
Headlights
Sunroof
RAP relay
supply
voltage
Headlamp
switch
headlamp-
on signal
Park
lamp
switch
signal
Rear
washer
relay
control
Head-
lamp
high
beam
relay
control
Head-
lamp
low
beam
relay
control
A14
Park
lamp
relay
control
Head-
lamp
switch
flash-to-
pass
signal
Headlamp
high beam
supply
voltage
Power Door Locks
Backup
lamp
supply
voltage
B12
C3
LT GRN
0.35
GRY
0.35
BLK/WHT
0.35
PNK/WHT
0.35
GRY/BLK
0.35
WHT
0.35
YEL
0.35
Back-Up
Lights
Rear Wiper/
Washer
Headlights
Parks
Lights
C3
RIBBON
CABLE
RIBBON
CABLE
RIBBON
CABLE
RIBBON
CABLE
RIBBON
CABLE
Rear Wiper/
Washer
Headlights
Headlights
Circuit Schematic
51-3
BODY CONTROL MODULE SYSTEM
BODY
CONTROL
MODULE
(BCM)
Connector
E11
B14
B1
B3
E8
B18
A4
C3
B10
E9
F6
C2
B4
C1
Anti-theft
System
Fog
Lights
Security
system
sensor
signal
Security
system
sensor low
reference
Head-
lamp on
indicator
control
B2
Park
brake
switch
signal
Interior
Lights
LED
dimming
signal
Instrument
panel
lamps
dimmer
switch low
reference
B7
GRY/BLK
0.35
Dash and Console Lights
Headlights
Fog
Lights
C3
Courtesy
lamp
supply
voltage
B5
5V
Reference
Instrument
panel lamps
dimming
control
Courtesy
lamp
supply
voltage
Front
fog
lamps
switch
signal
12V
Reference
Courtesy
lamp supply
voltage
GRY
0.35
YEL
0.35
ORN/BLK
0.35
PNK
0.35
DK
GRN/
WHT
0.35
ORN
0.35
BLK
0.35
RED/WHT
0.35
C2
C2
C1
Indicators
C2
E7
C2
C3
Fog
lamp
relay
control
Instrument
panel lamps
dimming
control
RIBBON
CABLE
RIBBON
CABLE
RIBBON
CABLE
RIBBON
CABLE
RIBBON
CABLE
RIBBON
CABLE
Circuit Schematic
51-4
BODY CONTROL MODULE SYSTEM
BODY
CONTROL
MODULE
(BCM)
Connector
B12
B11
A3
F14
A8
B1
F3
C2
F4
C2
A12
Interior
Lights
F11
Air Conditioning
Automatic
C3
B2
C2
C1
Right
rear door
ajar
switch
signal
Wind-
shield
wiper
switch
Signal 2
Left
sunload
sensor
signal
Right
sunload
sensor
signal
Ambient
light
sensor
signal
Ambient
light
sensor
low
reference
Interior
lamp
defeat
switch
signal
Courtesy
lamps on
signal
Left rear
door
ajar
switch
signal
Class 2
serial data
GRY
0.35
WHT
0.35
BLK
0.35
PPL
0.35
DK BLU/
WHT
0.35
LT BLU/
BLK
0.35
DK
GRN
0.35
YEL
0.35
LT GRN
0.35
Windshield
Wiper/
Washer
Air Conditioning
Automatic,
Headlights
Interior
Lights
C1
Class 2
serial data
Data lines
RIBBON
CABLE
RIBBON
CABLE
Data lines
Circuit Schematic
51-5
BODY CONTROL MODULE SYSTEM
120Ć3
The Body Control Module (BCM) performs multiple
body control functions. The BCM can control devices
directly connected to its outputs based on input
information. The BCM evaluates this information and
controls certain body control systems by commanding
outputs on or off. The BCM control inputs can be:
Sensors and switches that are directly connected to the
BCM or Class 2 serial data received from other control
modules connected to the class 2 serial data link.
The BCM is also capable of controlling other vehicle
systems that are not directly wired to the BCM. The
BCM does this by sending specific messages on the
class 2 serial data link. The control module capable of
performing the required function will respond to the
BCM message.
Circuit Operation
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