Nissan March K13. Manual — part 9
BCS
SYSTEM
BCS-9
< SYSTEM DESCRIPTION >
[WITH INTELLIGENT KEY SYSTEM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
COMBINATION SWITCH READING SYSTEM : System Diagram
INFOID:0000000006014817
NOTE:
*: TAIL LAMP switch links lighting switch 1ST position.
COMBINATION SWITCH READING SYSTEM : System Description
INFOID:0000000006014818
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). It reads a
maximum of 20 switch status.
COMBINATION SWITCH MATRIX
Combination switch circuit
NOTE:
*: TAIL LAMP switch links lighting switch 1ST position.
Combination switch INPUT-OUTPUT system list
JMMIA0392GB
JMMIA0393GB
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
RR WASHER
—
HEADLAMP 2
HI BEAM
BCS-10
< SYSTEM DESCRIPTION >
[WITH INTELLIGENT KEY SYSTEM]
SYSTEM
NOTE:
Headlamp has a dual system switch.
COMBINATION SWITCH READING FUNCTION
Description
• BCM reads the status of the combination switch at 10 ms interval normally.
NOTE:
BCM reads the status of the combination switch at 60 ms interval when BCM is controlled at low power con-
sumption 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.
- 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 switch) is turned ON
OUTPUT 4
RR WIPER INT
INT VOLUME 3
—
—
TAIL LAMP
OUTPUT 5
INT VOLUME 2
RR WIPER
—
FR FOG
—
System
INPUT 1
INPUT 2
INPUT 3
INPUT 4
INPUT 5
JPMIA0609GB
JMMIA0326GB
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
• 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 switch, TAIL LAMP switch) are turned ON
• 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.
JMMIA0394GB
JMMIA0395GB
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
BCS-12
< SYSTEM DESCRIPTION >
[WITH INTELLIGENT KEY SYSTEM]
SYSTEM
NOTE:
For details of wiper intermittent dial position, refer to
WW-6, "FRONT WIPER AND WASHER SYSTEM : System Description"
.
SIGNAL BUFFER SYSTEM
SIGNAL BUFFER SYSTEM : System Diagram
INFOID:0000000006014819
SIGNAL BUFFER SYSTEM : System Description
INFOID:0000000006014820
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
6
OFF
ON
ON
7
OFF
ON
OFF
Wiper intermittent
dial position
Switch status
INT VOLUME 1
INT VOLUME 2
INT VOLUME 3
JMMIA0396GB
Signal name
Input
Output
Description
Ignition switch ON signal
Push-button ignition 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.
Blower fan on signal
A/C auto amp.
ECM (CAN)
Input blower fan switch signal,
and transmit the blower fan on
signal via CAN communication.
A/C on signal
A/C auto amp.
ECM (CAN)
Input A/C switch signal, and
transmit the A/C on signal via
CAN communication.
Oil pressure switch signal
IPDM E/R (CAN)
Combination meter (CAN)
Transmits the received oil pres-
sure switch signal via CAN
communication.
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