Nissan Sentra. Manual - part 127

BCS-78

< SYSTEM DESCRIPTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

COMPONENT PARTS

POWER CONSUMPTION CONTROL SYSTEM
POWER CONSUMPTION CONTROL SYSTEM : Component Parts Location

INFOID:0000000009757354

1.

BCM (view with combination meter 
removed)

2.

Combination switch (lighting and 
turn signal) (with fog lamps)

3.

Combination switch (lighting and 
turn signal) (without fog lamps)

4.

Combination switch (wiper and 
washer)

1

IPDM E/R

2

BCM (view with instrument panel re-
moved)

3

Combination meter

AWMIA1357ZZ

BCS

SYSTEM

BCS-79

< SYSTEM DESCRIPTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

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SYSTEM

BODY CONTROL SYSTEM
BODY CONTROL SYSTEM : System Description

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OUTLINE

• BCM (Body Control Module) controls various electrical components. It receives the information required

from CAN communication and the signals received from each switch and sensor.

• BCM has a combination switch reading function for reading the status of combination switch (light, turn sig-

nal, wiper and washer) in addition to functions for controlling the operation of various electrical components.

It also has a signal transmission function for other systems, and a power consumption control function that

reduces the power consumption with the ignition switch OFF.

• BCM is equipped with a diagnosis function that operates with CONSULT and allows for various settings to

be changed.

BCM FUNCTION LIST

System

Reference page

Combination switch reading system

BCS-80, "COMBINATION SWITCH READING SYSTEM : System 
Diagram"

Signal buffer system

BCS-83, "SIGNAL BUFFER : System Diagram"

Power consumption control system

BCS-83, "POWER CONSUMPTION CONTROL SYSTEM : System 
Diagram"

Headlamp system

EXL-8, "HEADLAMP SYSTEM : System Description"

Daytime running light system (if equipped)

EXL-9, "DAYTIME RUNNING LIGHT SYSTEM : System Descrip-
tion"

Turn signal and hazard warning lamp system

EXL-10, "TURN SIGNAL AND HAZARD WARNING LAMPS : Sys-
tem Description"

Parking, license plate, side maker and tail lamps system

EXL-11, "PARKING, LICENSE PLATE AND TAIL LAMPS : System 
Description"

Front fog lamp system (if equipped)

EXL-10, "FRONT FOG LAMP SYSTEM : System Description"

Exterior lamp battery saver system

EXL-8, "HEADLAMP SYSTEM : System Description"

Interior room lamp control system

INL-8, "INTERIOR ROOM LAMP CONTROL SYSTEM : System De-
scription"

Interior room lamp battery saver system

INL-8, "INTERIOR ROOM LAMP CONTROL SYSTEM : System De-
scription"

Front wiper and washer system

WW-8, "System Description"

Manual air conditioner system

HAC-121, "System Description"

Warning chime system

WCS-6, "WARNING CHIME SYSTEM : System Description"

Power door lock system

DLK-216, "POWER DOOR LOCK SYSTEM : System Description"

Trunk lid opener system

DLK-219, "System Description"

Nissan vehicle immobilizer system-NATS (NVIS)

SEC-141, "NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS : 
System Description"

Vehicle security system

SEC-142, "VEHICLE SECURITY SYSTEM : System Description"

Panic alarm

SEC-142, "VEHICLE SECURITY SYSTEM : System Description"

Rear window defogger system

DEF-6, "System Description"

Remote keyless entry system

DLK-217, "REMOTE KEYLESS ENTRY SYSTEM : System De-
scription"

Power window system

PWC-8, "System Description"

Retained accessory power (RAP) system

BCS-95, "RETAINED PWR : CONSULT Function (BCM - RE-
TAINED PWR)"

TPMS (tire pressure monitoring system)

WT-8, "TIRE PRESSURE MONITORING SYSTEM : System De-
scription"

BCS-80

< SYSTEM DESCRIPTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

SYSTEM

COMBINATION SWITCH READING SYSTEM
COMBINATION SWITCH READING SYSTEM : System Diagram

INFOID:0000000009757356

COMBINATION SWITCH READING SYSTEM : System Description

INFOID:0000000009757357

OUTLINE

• BCM reads the status of the combination switch (light, turn signal, wiper and washer) and recognizes the

status of each switch.

• BCM has a combination of 5 output terminals (OUTPUT 1 - 5) and 5 input terminals (INPUT 1 - 5). It reads a

maximum of 20 switch states.

COMBINATION SWITCH MATRIX

Combination switch circuit

Combination switch INPUT-OUTPUT system list

AWMIA1224GB

System

INPUT 1

INPUT 2

INPUT 3

INPUT 4

INPUT 5

OUTPUT 1

—

FR WASHER

FR WIPER LOW

TURN LH

TURN RH

OUTPUT 2

FR WIPER HI

—

FR WIPER INT

PASSING

HEADLAMP 1

OUTPUT 3

INT VOLUME 1

—

—

HEADLAMP 2

HI BEAM

AWMIA1221GB

BCS

SYSTEM

BCS-81

< SYSTEM DESCRIPTION >

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COMBINATION SWITCH READING FUNCTION

Description

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

NOTE:

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

consumption control 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

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

OUTPUT 4

—

INT VOLUME 3

—

—

TAIL LAMP

OUTPUT 5

INT VOLUME 2

—

—

FR FOG

—

System

INPUT 1

INPUT 2

INPUT 3

INPUT 4

INPUT 5

JPMIA0609GB

JMMIA0326GB