Nissan Titan A60. Manual — part 132
BCS-8
< SYSTEM DESCRIPTION >
[BCM]
COMBINATION SWITCH READING SYSTEM
Combination switch circuit
Combination switch INPUT-OUTPUT system list
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 20 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.
- INPUT 1 - 5 outputs the voltage waveforms of 5 systems simultaneously.
- It operates the transistor on OUTPUT side in the following order: OUTPUT 5
→ 4 → 3 → 2 → 1.
System
OUTPUT 1
OUTPUT 2
OUTPUT 3
OUTPUT 4
OUTPUT 5
INPUT 1
—
FR WASHER
FR WIPER LOW
TURN LH
TURN RH
INPUT 2
FR WIPER HI
—
FR WIPER INT
PASSING
HEADLAMP 1
INPUT 3
INT VOLUME 1
—
—
HEADLAMP 2
HI BEAM
INPUT 4
—
INT VOLUME 3
AUTO LIGHT
—
TAIL LAMP
INPUT 5
INT VOLUME 2
—
—
FR FOG
—
LIIA1325E
JPMIA0067GB
BCS
COMBINATION SWITCH READING SYSTEM
BCS-9
< SYSTEM DESCRIPTION >
[BCM]
C
D
E
F
G
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- The voltage waveform of INPUT corresponding to the formed circuit changes according to the operation of
the transistor on OUTPUT 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 (TURN RH switch) is turned ON
• The circuit between INPUT 1 and OUTPUT 5 is formed when the TURN RH switch is turned ON.
• BCM detects the combination switch status signal “1E” when the signal of OUTPUT 5 is input to INPUT 1.
• BCM judges that the TURN RH switch is ON when the signal “1E” is detected.
Example 2: When some switches (turn RH switch, front wiper LO switch) are turned ON
JPMIA0068GB
ALMIA0297GB
BCS-10
< SYSTEM DESCRIPTION >
[BCM]
COMBINATION SWITCH READING SYSTEM
• The circuits between INPUT 1 and OUTPUT 5 and between INPUT 1 and OUTPUT 3 are formed when the
TURN RH switch and FR WIPER LOW switch are turned ON.
• BCM detects the combination switch status signal “1CE” when the signals of OUTPUT 3 and OUTPUT 5 are
input to INPUT 1.
• BCM judges that the TURN RH switch and FR WIPER LOW switch are ON when the signal “1CE” is
detected.
WIPER INTERMITTENT DIAL POSITION SETTING (FRONT WIPER INTERMITTENT OPERATION)
BCM judges the wiper intermittent dial 1 - 7 by the status of INT VOLUME 1, 2 and 3 switches.
Component Parts Location
INFOID:0000000006161315
ALMIA0298GB
Wiper intermittent
dial position
Intermittent
operation delay
interval
INT VOLUME switch ON/OFF status
INT VOLUME 1 switch
INT VOLUME 2 switch
INT VOLUME 3 switch
1
Short
↑
↓
Long
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
ALMIA0299ZZ
BCS
COMBINATION SWITCH READING SYSTEM
BCS-11
< SYSTEM DESCRIPTION >
[BCM]
C
D
E
F
G
H
I
J
K
L
B
A
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1.
BCM M18, M19, M20 (view with in-
strument panel removed)
2.
Combination switch (lighting and
turn signal switch) M28
3.
Combination switch (wiper and
washer switch) M28
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