Nissan Tiida C11. Manual - part 37

BCS-12

< FUNCTION DIAGNOSIS >

COMBINATION SWITCH READING SYSTEM

Component Parts Location

INFOID:0000000001451457

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.

BCM M18, M19, M20 (view with 
glove box removed)

2.

Combination switch (light and turn 
signal switch) M28

3.

Combination switch (wiper and 
washer switch) M28

ALMIA0186ZZ

BCS

SIGNAL BUFFER SYSTEM

BCS-13

< FUNCTION DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

SIGNAL BUFFER SYSTEM

System Diagram

INFOID:0000000001451458

System Description

INFOID:0000000001451459

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)
ECM (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.

BCS-14

< FUNCTION DIAGNOSIS >

POWER CONSUMPTION CONTROL SYSTEM

POWER CONSUMPTION CONTROL SYSTEM

System Diagram

INFOID:0000000001451460

System Description

INFOID:0000000001451461

OUTLINE

• BCM incorporates a power consumption control function that reduces the power consumption according to

the vehicle status. 

• BCM switches the status (control mode) by itself with the power saving control function. It performs the sleep

request to each unit [IPDM E/R, combination meter and Intelligent Key unit (with Intelligent Key)] that oper-
ates with the ignition switch OFF.

Normal mode (wake-up)

- CAN communication is normally performed with other units
- Each control with BCM is operating properly

CAN communication sleep mode (CAN sleep)

- CAN transmission is stopped
- Control with BCM only is operating

Low power consumption mode (BCM sleep)

- Low power consumption control is active
- CAN transmission is stopped

LOW POWER CONSUMPTION CONTROL WITH BCM

BCM reduces the power consumption with the following operation in the low power consumption mode.
• The reading interval of the each switches changes from 10 ms interval to 20 ms interval.

Sleep mode activation

• BCM receives the sleep-ready signal (ready) from IPDM E/R, combination meter and Intelligent Key unit

(with Intelligent Key) via CAN communication.

• BCM transmits the sleep wake up signal (sleep) to each unit when all of the CAN sleep conditions are ful-

filled.

• Each unit stops the transmission of CAN communication with the sleep wake up signal. BCM is in CAN com-

munication sleep mode.

• BCM is in the low power consumption mode and perform the low power consumption control when all of the

BCM sleep conditions are fulfilled with CAN sleep condition.

JPMIA0125GB

BCS

POWER CONSUMPTION CONTROL SYSTEM

BCS-15

< FUNCTION DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

Sleep condition

Wake-up operation

• BCM transmits sleep wake up signal (wake up) to each unit when any condition listed below is established,

and then goes into normal mode from low power consumption mode.

• Each unit starts transmissions with CAN communication by receiving sleep wake up signals. Each unit trans-

mits wake up signals to BCM with CAN communication to convey the start of CAN communication.

Wake-up condition

Component Parts Location

INFOID:0000000001451462

CAN sleep condition

BCM sleep condition

• Receiving the sleep-ready signal (ready) from all units
• Ignition switch: OFF
• Vehicle security system alarm: No operation
• Warning lamp: No operation
• Warning chime: No operation
• Stop lamp switch: OFF
• Key switch status: No change for 2 seconds
• Hazard warning lamp: No operation
• Exterior  lamp:  OFF
• Door lock status: No change for 2 seconds
• CONSULT-III communication status: No communication
• Door switch status: No change for 2 seconds

The controls only BCM are completed.
(Interior room lamp battery saver: Time out etc.)

BCM wake-up condition

• Ignition switch: OFF 

→

 ACC or ON

• Stop lamp switch: ON (Depress brake pedal)
• Any door switch: OFF 

→

 ON

• Lighting switch: OFF 

→

 1ST or PASS

• Hazard switch: OFF 

→

 ON

• Back door opener switch OFF 

→

 ON

• Remote keyless entry receiver: Receiving (with remote keyless entry)
• Intelligent Key unit: Receiving (with Intelligent Key)

1.

IPDM E/R E46 

2.

BCM M18, M19, M20 (view with 
glove box removed)

3.

Intelligent Key unit M52 (with Intelli-
gent Key) (view with glove box re-
moved)

4.

Combination meter M24

ALMIA0187ZZ