Nissan Maxima. Manual — part 216

BCS

COMBINATION SWITCH READING SYSTEM

BCS-11

< SYSTEM DESCRIPTION >

[BCM]

C

D

E

F

G

H

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B

A

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COMBINATION SWITCH READING FUNCTION

Description

• BCM reads the status of the combination switch at 10ms intervals normally.

NOTE:

BCM reads the status of the combination switch at 60ms intervals when BCM is controlled at low power con-

sumption 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

OUTPUT 4

—

INT VOLUME 3

AUTO LIGHT

—

TAIL LAMP

OUTPUT 5

INT VOLUME 2

—

—

FR FOG

—

System

INPUT 1

INPUT 2

INPUT 3

INPUT 4

INPUT 5

JPMIA0609GB

JMMIA0326GB

BCS-12

< SYSTEM DESCRIPTION >

[BCM]

COMBINATION SWITCH READING SYSTEM

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 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 (TRUN 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.

• 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 SETTING (FRONT WIPER INTERMITTENT OPERATION)

BCM judges the wiper intermittent dial 1 - 7 by the status of INT VOLUME 1, 2, and 3 switches.

AWMIA1217GB

AWMIA1218GB

BCS

COMBINATION SWITCH READING SYSTEM

BCS-13

< SYSTEM DESCRIPTION >

[BCM]

C

D

E

F

G

H

I

J

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L

B

A

O

P

N

Wiper intermittent dial posi-

tion

Intermittent oper-

ation delay inter-

val

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

BCS-14

< SYSTEM DESCRIPTION >

[BCM]

SIGNAL BUFFER SYSTEM

SIGNAL BUFFER SYSTEM

System Diagram

INFOID:0000000009467034

System Description

INFOID:0000000009467035

OUTLINE

BCM has the signal transmission function that outputs/transmits each input/received signal to each unit.

Signal transmission function list

JPMIA0070GB

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.

Trunk switch signal

Trunk room lamp switch

Combination meter (CAN)

Inputs the trunk room lamp
switch signal and transmits the
trunk switch 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.