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]

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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]

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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