Nissan GT-R. Manual - part 50

 

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Nissan GT-R. Manual - part 50

 

 

BCS-6

< SYSTEM DESCRIPTION >

COMBINATION SWITCH READING 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 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.

- 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”.

INPUT 3

INT VOLUME 1

HEADLAMP 2

HI BEAM

INPUT 4

INT VOLUME 3

AUTO LIGHT

TAIL LAMP

INPUT 5

INT VOLUME 2

System

OUTPUT 1

OUTPUT 2

OUTPUT 3

OUTPUT 4

OUTPUT 5

JPMIA0067GB

JPMIA0068GB

BCS

COMBINATION SWITCH READING SYSTEM

BCS-7

< SYSTEM DESCRIPTION >

C

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E

F

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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

• 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

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

JMMIA1047GB

JMMIA1048GB

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-8

< SYSTEM DESCRIPTION >

COMBINATION SWITCH READING SYSTEM

NOTE:

For details of wiper intermittent dial position, refer to 

WW-2, "System Description"

.

6

OFF

ON

ON

7

OFF

ON

OFF

Wiper intermittent dial position

Switch status  

INT VOLUME 1

INT VOLUME 2

INT VOLUME 3

BCS

SIGNAL BUFFER SYSTEM

BCS-9

< SYSTEM DESCRIPTION >

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SIGNAL BUFFER SYSTEM

System Diagram

INFOID:0000000009160232

System Description

INFOID:0000000009160233

OUTLINE

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

Signal transmission function list

JPMIA1141GB

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.

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.

Low tire pressure warning lamp 
signal

Low tire pressure warning con-
trol unit (CAN)

Combination meter (CAN)

Transmits the received low tire 
pressure warning lamp signal 
via CAN communication.

Run-flat tire warning display sig-
nal

Low tire pressure warning con-
trol unit (CAN)

Combination meter (CAN)

Transmits the received run flat 
tire warning display signal via 
CAN communication.

Buzzer request signal

Low tire pressure warning con-
trol unit (CAN)

Combination meter (CAN)

Transmits the received buzzer 
request signal via CAN commu-
nication.

 

 

 

 

 

 

 

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