Nissan Qashqai (2007-2010). Manual - part 1480

BCS-10

< FUNCTION DIAGNOSIS >

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 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.

- 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

INPUT 4

RR WIPER INT

INT VOLUME 3

AUTO LIGHT

—

TAIL LAMP

INPUT 5

INT VOLUME 2

RR WIPER

RR FOG

FR FOG

—

System

OUTPUT 1

OUTPUT 2

OUTPUT 3

OUTPUT 4

OUTPUT 5

JPMIA0067GB

JPMIA0068GB

BCS

COMBINATION SWITCH READING SYSTEM

BCS-11

< FUNCTION DIAGNOSIS >

C

D

E

F

G

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B

A

O

P

N

• 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 SETTING (FRONT WIPER INTERMITTENT OPERATION)

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

JPMIA0122GB

JPMIA0123GB

BCS-12

< FUNCTION DIAGNOSIS >

COMBINATION SWITCH READING SYSTEM

Component Parts Location

INFOID:0000000000924595

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

1.

Combination switch

2.

BCM

A.

Over the glove box

JPMIA0243ZZ

BCS

SIGNAL BUFFER SYSTEM

BCS-13

< FUNCTION DIAGNOSIS >

C

D

E

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A

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SIGNAL BUFFER SYSTEM

System Diagram

INFOID:0000000000924596

System Description

INFOID:0000000000924597

OUTLINE

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

Signal transmission function list

JPMIA0124GB

Signal name

Input

Output

Description

Door switch signal

Any door switch

• Combination meter (CAN)
• IPDM E/R (CAN)
• Intelligent Key unit (CAN)
• NAVI control unit (CAN)

Inputs the door switch signal 
and transmits it via CAN com-
munication.

Stop lamp switch signal

Stop lamp switch

TCM (CAN)

Inputs the stop lamp switch sig-
nal and transmits the stop lamp 
switch signal via CAN commu-
nication.

Oil pressure switch signal

IPDM E/R (CAN)

Combination meter (CAN)

Transmits the received oil pres-
sure switch signal via CAN 
communication.