Nissan Frontier. Manual - part 95

BCS

COMBINATION SWITCH READING SYSTEM

BCS-9

< SYSTEM DESCRIPTION >

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• The circuit between OUTPUT 4 and INPUT 5 is formed when the TAIL LAMP switch 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 (TURN 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.

AWMIA1245GB

AWMIA1246GB

BCS-10

< SYSTEM DESCRIPTION >

COMBINATION SWITCH READING SYSTEM

Component Parts Location

INFOID:0000000009479182

Wiper intermittent

dial position

Intermittent

operation delay 

interval

INT VOLUME switch ON/OFF status  

INT VOLUME 1

INT VOLUME 2

INT VOLUME 3

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 low-
er instrument panel LH removed)

2.

Combination switch (lighting and 
turn signal switch) M28

3.

Combination switch (wiper and 
washer switch) M28

ALMIA0416ZZ

BCS

SIGNAL BUFFER SYSTEM

BCS-11

< SYSTEM DESCRIPTION >

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SIGNAL BUFFER SYSTEM

System Diagram

INFOID:0000000009479183

System Description

INFOID:0000000009479184

OUTLINE

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

Signal transmission function list

ALMIA0263GB

Signal name

Input

Output

Description

Oil pressure switch signal

IPDM E/R (CAN)

Combination meter (CAN)

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

BCS-12

< SYSTEM DESCRIPTION >

POWER CONSUMPTION CONTROL SYSTEM

POWER CONSUMPTION CONTROL SYSTEM

System Diagram

INFOID:0000000009479185

System Description

INFOID:0000000009479186

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 and combination meter) that operates 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 and combination meter via CAN communica-

tion.

• 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.

ALMIA0300GB