Nissan Maxima. Manual — part 215
BCS
DIAGNOSIS AND REPAIR WORKFLOW
BCS-7
< BASIC INSPECTION >
[BCM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
>> Work End.
3.
PERFORM “AFTER REPLACE ECU” OR “MANUAL CONFIGURATION”
CONSULT
1. Select “After Replace ECU” or “Manual Configuration”.
2. Identify the correct model and configuration list. Refer to
BCS-7, "CONFIGURATION (BCM) : Configura-
.
3. Confirm and/or change setting value for each item.
CAUTION:
Thoroughly read and understand the vehicle specification. ECU control may not operate normally
if the setting is not correct.
4. Select “Next”.
CAUTION:
Make sure to select “Next”, confirm each setting value and press “OK” even if the indicated con-
figuration of brand new BCM is same as the desirable configuration. If not, configuration which is
set automatically by selecting vehicle model can not be memorized.
5. When "Completed", select "End".
>> GO TO 4.
4.
OPERATION CHECK
Confirm that each function controlled by BCM operates normally.
>> Work End.
CONFIGURATION (BCM) : Configuration list
INFOID:0000000009467029
MANUAL SETTING ITEM
Items
Setting value
AUTO LIGHT
WITH
⇔WITHOUT
DTRL
WITH
⇔WITHOUT
AV C/U
WITH
⇔WITHOUT
BCS-8
< SYSTEM DESCRIPTION >
[BCM]
BODY CONTROL SYSTEM
SYSTEM DESCRIPTION
BODY CONTROL SYSTEM
System Description
INFOID:0000000009467030
OUTLINE
• BCM (body control module) controls the various electrical components. It inputs the information required to
the control from CAN communication and the signal received from each switch and sensor.
• BCM has combination switch reading function for reading the operation status of combination switches (light,
turn signal, wiper and washer) in addition to a function for controlling the operation of various electrical com-
ponents. It also has the signal transmission function as the passed point of signal and the power saving con-
trol function that reduces the power consumption with the ignition switch OFF.
• BCM is equipped with the diagnosis function that performs the diagnosis with CONSULT and various set-
tings.
CAN communication control
In CAN communication, control units are connected with 2 communication lines (CAN-L, CAN-H) allowing a
high rate of information transmission with less wiring. Each control unit transmits/receives the data but selec-
tively reads required information only.
CAN communication signal
Refer to the
LAN-24, "CAN Communication Signal Chart"
.
BCM control function list
System
Refer to
Combination switch reading system
Signal buffer system
Power consumption control system
Auto light system
Turn signal and hazard warning lamp system
Headlamp system (xenon type)
Headlamp system (halogen type)
Front fog lamp system (if equipped)
Exterior lamp battery saver system
Daytime running light system (Canada only)
Interior room lamp control system
Step lamp system
Interior room lamp battery saver system
Front wiper and washer system
Warning chime system
WCS-5, "WARNING CHIME SYSTEM : System Description"
Door lock system
DLK-17, "DOOR LOCK AND UNLOCK SWITCH : System De-
scription"
Trunk open system
DLK-30, "TRUNK LID OPENER SWITCH : System Description"
Automatic drive positioner system (if equipped)
ADP-10, "AUTOMATIC DRIVE POSITIONER SYSTEM : System
Description"
Nissan vehicle immobilizer system
Vehicle security system
Panic alarm
Rear window defogger system
BCS
BODY CONTROL SYSTEM
BCS-9
< SYSTEM DESCRIPTION >
[BCM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
Component Parts Location
INFOID:0000000009467031
Intelligent Key system/engine start sys-
tem
Door lock function
•
DLK-19, "DOOR REQUEST SWITCH : System Description"
(door request switch)
•
DLK-24, "INTELLIGENT KEY : System Description"
(Intelligent
Key)
Trunk open function
•
DLK-32, "TRUNK REQUEST SWITCH : System Description"
(trunk request switch)
•
DLK-37, "INTELLIGENT KEY : System Description"
(Intelligent
Key)
Warning function
Key reminder function
Engine start function
Power window system
RAP (retained accessory power) system
BCS-30, "RETAINED PWR : CONSULT Function (BCM - RE-
TAINED PWR)"
TPMS (tire pressure monitor system)
System
Refer to
1.
BCM M16, M17, M18, M19, M20,
M21 (view with instrument panel re-
moved)
ALMIA0467ZZ
BCS-10
< SYSTEM DESCRIPTION >
[BCM]
COMBINATION SWITCH READING SYSTEM
COMBINATION SWITCH READING SYSTEM
System Diagram
INFOID:0000000009467032
System Description
INFOID:0000000009467033
OUTLINE
• BCM reads the status of the combination switch (light, turn signal, wiper and washer) and recognizes the
status of each switch.
• BCM has a combination of 5 output terminals (OUTPUT 1 - 5) and 5 input terminals (INPUT 1 - 5) and reads
a maximum of 20 switch states.
COMBINATION SWITCH MATRIX
Combination switch circuit
Combination switch INPUT-OUTPUT system list
AWMIA1215GB
System
INPUT 1
INPUT 2
INPUT 3
INPUT 4
INPUT 5
OUTPUT 1
—
FR WASHER
FR WIPER LOW
TURN LH
TURN RH
OUTPUT 2
FR WIPER HI
—
FR WIPER INT
PASSING
HEADLAMP 1
OUTPUT 3
INT VOLUME 1
—
—
HEADLAMP 2
HI BEAM
AWMIA1216GB
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