Nissan Sentra. Instruction — part 110
BCS-10
< SYSTEM DESCRIPTION >
[WITH INTELLIGENT KEY SYSTEM]
SYSTEM
Combination switch circuit
Combination switch INPUT-OUTPUT system list
COMBINATION SWITCH READING FUNCTION
Description
• BCM reads the status of the combination switch at 10 ms intervals normally.
NOTE:
BCM reads the status of the combination switch at 60 ms intervals when BCM is controlled at low power
consumption control mode.
• BCM operates as follows and judges the status of the combination switch.
- It operates the transistor on OUTPUT side in the following order: OUTPUT 1
→ 2 → 3 → 4 → 5, and outputs
voltage waveform.
- The voltage waveform of OUTPUT corresponding to the formed circuit is input into the interface on INPUT
side if any (1 or more) switches are ON.
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
OUTPUT 4
—
INT VOLUME 3
AUTO LIGHT
—
TAIL LAMP
OUTPUT 5
INT VOLUME 2
—
—
FR FOG
—
AWMIA1360GB
JPMIA0609GB
BCS
SYSTEM
BCS-11
< SYSTEM DESCRIPTION >
[WITH INTELLIGENT KEY SYSTEM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
- It reads this change of the voltage as the status signal of the combination switch.
Operation Example
In the following operation example, the combination of the status signals of the combination switch is replaced
as follows: INPUT 1 - 5 to “1 - 5” and OUTPUT 1 - 5 to “A - E”.
Example 1: When a switch (TAIL LAMP) is turned ON
• The circuit between OUTPUT 4 and INPUT 5 is formed when the TAIL LAMP switch is turned ON.
• BCM detects the combination switch status signal “5D” when the signal of OUTPUT 4 is input to INPUT 5.
• BCM judges that the TAIL LAMP switch is ON when the signal “5D” is detected.
Example 2: When some switches (TURN RH, TAIL LAMP) are turned ON
JMMIA0326GB
AWMIA1361GB
BCS-12
< SYSTEM DESCRIPTION >
[WITH INTELLIGENT KEY SYSTEM]
SYSTEM
• The circuits between OUTPUT 1 and INPUT 5 and between OUTPUT 4 and INPUT 5 are formed when the
TURN RH switch and TAIL LAMP switch are turned ON.
• BCM detects the combination switch status signal “5AD” when the signals of OUTPUT 1 and OUTPUT 4 are
input to INPUT 5.
• BCM judges that the TURN RH switch and TAIL LAMP switch are ON when the signal “5AD” is detected.
WIPER INTERMITTENT DIAL POSITION
BCM judges the wiper intermittent dial 1 - 7 by the status of INT VOLUME 1, 2 and 3 switches.
NOTE:
For details of wiper intermittent dial position, refer to
SIGNAL BUFFER SYSTEM
SIGNAL BUFFER SYSTEM : System Diagram
INFOID:0000000009757302
AWMIA1362GB
Wiper intermittent
dial position
Switch status
INT VOLUME 1
INT VOLUME 2
INT VOLUME 3
1
ON
ON
ON
2
ON
ON
OFF
3
ON
OFF
OFF
4
OFF
OFF
OFF
5
OFF
OFF
ON
6
OFF
ON
ON
7
OFF
ON
OFF
AWMIA1275GB
BCS
SYSTEM
BCS-13
< SYSTEM DESCRIPTION >
[WITH INTELLIGENT KEY SYSTEM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
SIGNAL BUFFER SYSTEM : System Description
INFOID:0000000009757303
OUTLINE
BCM has the signal transmission function that outputs/transmits each input/received signal to each unit.
Signal transmission function list
POWER CONSUMPTION CONTROL SYSTEM
POWER CONSUMPTION CONTROL SYSTEM : System Diagram
INFOID:0000000009757304
POWER CONSUMPTION CONTROL SYSTEM : System Description
INFOID:0000000009757305
OUTLINE
• BCM incorporates a power saving control function that reduces the power consumption according to the
vehicle status.
• BCM switches the status (control mode) by itself with the power saving control function. It performs the sleep
request to each unit (IPDM E/R and combination meter) that operates with the ignition switch OFF.
Normal mode (wake-up)
- CAN communication is normally performed with other units
- Each control with BCM is operating properly
CAN communication sleep mode (CAN sleep)
- CAN transmission is stopped
- Control with BCM only is operating
Low power consumption mode (BCM sleep)
- Low power consumption control is active
- CAN transmission is stopped
LOW POWER CONSUMPTION CONTROL WITH BCM
BCM reduces the power consumption with the following operation in the low power consumption mode.
• The reading interval of each switch changes from 10 ms interval to 60 ms interval.
Sleep mode activation
Signal name
Input
Output
Description
• Ignition switch ON signal
• Ignition switch signal
Engine switch (push switch)
IPDM E/R (CAN)
Inputs the push-button ignition
switch (push switch) signal and
transmits the ignition switch sta-
tus judged with BCM via CAN
communication.
Door switch signal
Any door switch
• Combination meter (CAN)
• IPDM E/R (CAN)
Inputs the door switch signal
and transmits it via CAN com-
munication.
ALCIA0030GB
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