Nissan Note E12. Manual — part 51
BCS-8
< SYSTEM DESCRIPTION >
SYSTEM
Combination Switch Circuit (Without Variable Intermittent Wipers)
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 states.
COMBINATION SWITCH MATRIX (WITH VARIABLE INTERMITTENT WIPERS)
Combination switch circuit (With Variable Intermittent Wipers)
Combination switch INPUT-OUTPUT system list
COMBINATION SWITCH MATRIX (WITHOUT VARIABLE INTERMITTENT WIPERS)
AWMIA1428GB
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
OUTPUT 4
RR WIPER INT
INT VOLUME 3
—
—
TAIL LAMP
OUTPUT 5
INT VOLUME 2
RR WIPER ON
—
FR FOG
—
AWMIA1429GB
BCS
SYSTEM
BCS-9
< SYSTEM DESCRIPTION >
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
Combination Switch Circuit (Without Variable Intermittent Wipers)
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
—
—
—
HEADLAMP 2
HI BEAM
OUTPUT 4
—
—
—
—
TAIL LAMP
OUTPUT 5
—
—
—
—
—
AWMIA1430GB
JPMIA0609GB
BCS-10
< SYSTEM DESCRIPTION >
SYSTEM
- 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.
Combination switch circuit (With Variable Intermittent Wipers)
JMMIA0326GB
AWMIA1431GB
BCS
SYSTEM
BCS-11
< SYSTEM DESCRIPTION >
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
Combination switch circuit (Without Variable Intermittent Wipers)
• 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
• 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.
Combination switch circuit (With Variable Intermittent Wipers)
AWMIA1432GB
AWMIA1433GB
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