Nissan March K13. Manual - part 22

BCS

SYSTEM

BCS-61

< SYSTEM DESCRIPTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

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SYSTEM

BODY CONTROL SYSTEM

BODY CONTROL SYSTEM : System Description

INFOID:0000000006014870

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 switches (light, turn

signal, wiper and washer) in addition to functions for controlling the operation of various electrical compo-
nents. It also has a signal transmission function, for other systems, and a power consumption control func-
tion that reduces the power consumption with the ignition switch OFF.

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

be changed.

BCM FUNCTION LIST

BODY CONTROL SYSTEM : Fail-safe

INFOID:0000000006032442

FAIL-SAFE CONTROL BY DTC

BCM performs fail-safe control when any DTC are detected.

System

Reference page

Combination switch reading system

BCS-62, "COMBINATION SWITCH READING SYSTEM : System 
Diagram"

Signal buffer system

BCS-66, "SIGNAL BUFFER SYSTEM : System Diagram"

Power consumption control system

BCS-66, "POWER CONSUMPTION CONTROL SYSTEM : System 
Diagram"

Headlamp system

EXL-7, "HEADLAMP SYSTEM : System Diagram"

Front fog lamp system

EXL-8, "FRONT FOG LAMP SYSTEM : System Diagram"

Turn signal and hazard warning lamp system

EXL-8, "TURN SIGNAL AND HAZARD WARNING LAMP SYSTEM 
: System Diagram"

Parking, license plate, side maker and tail lamps system

EXL-9, "PARKING, LICENSE PLATE AND TAIL LAMP SYSTEM : 
System Diagram"

Exterior lamp battery saver system

EXL-10, "EXTERIOR LAMP BATTERY SAVER SYSTEM : System 
Diagram"

Interior room lamp control system

INL-8, "INTERIOR ROOM LAMP CONTROL SYSTEM (WITHOUT 
INTELLIGENT KEY SYSTEM) : System Diagram"

Interior room lamp battery saver system

INL-10, "INTERIOR ROOM LAMP BATTERY SAVER SYSTEM : 
System Diagram"

Front wiper and washer system

WW-6, "FRONT WIPER AND WASHER SYSTEM : System Dia-
gram"

Rear wiper and washer system

WW-9, "REAR WIPER AND WASHER SYSTEM : System Diagram"

Automatic air conditioner system

HAC-13, "System Diagram"

Manual air conditioner system

HAC-88, "System Diagram"

Heater and ventilation

HAC-126, "System Diagram"

Warning chime system

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

Power door lock system

DLK-154, "System Diagram"

Nissan anti-theft system (NATS)

SEC-132, "NISSAN ANTI-THEFT SYSTEM : System Diagram"

Rear window defogger system

DEF-6, "REAR WINDOW DEFOGGER : System Diagram"

Remote keyless entry system

DLK-155, "System Diagram"

Power window system

PWC-6, "POWER WINDOW SYSTEM : System Diagram"

BCS-62

< SYSTEM DESCRIPTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

SYSTEM

REAR WIPER MOTOR PROTECTION

BCM detects the rear wiper stopping position according to the rear wiper auto stop signal.
When the rear wiper auto stop signal does not change more than 5 seconds while driving the rear wiper, BCM
stops power supply to protect the rear wiper motor.

Condition of cancellation

1.

Pass more than 1 minute after the rear wiper stop.

2.

Turn rear wiper switch OFF.

3.

Operate the rear wiper switch or rear washer switch.

COMBINATION SWITCH READING SYSTEM

COMBINATION SWITCH READING SYSTEM : System Diagram

INFOID:0000000006032440

NOTE:
*: TAIL LAMP switch links lighting switch 1ST position.

COMBINATION SWITCH READING SYSTEM : System Description

INFOID:0000000006032441

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 status.

COMBINATION SWITCH MATRIX

Display contents of CONSULT

Fail-safe

Cancellation

B2190: NATS ANTENNA AMP

Inhibit engine cranking

Erase DTC

B2191: DIFFERENCE OF KEY

Inhibit engine cranking

Erase DTC

B2192: ID DISCORD BCM-ECM

Inhibit engine cranking

Erase DTC

B2193: CHAIN OF BCM-ECM

Inhibit engine cranking

Erase DTC

B2195: ANTI SCANNING

Inhibit engine cranking

Ignition switch ON 

→

 OFF

JMMIA0392GB

BCS

SYSTEM

BCS-63

< SYSTEM DESCRIPTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

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Combination switch circuit

NOTE:
*: TAIL LAMP switch links lighting switch 1ST position.

Combination switch INPUT-OUTPUT system list

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 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.

JMMIA0393GB

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

RR WASHER

—

HEADLAMP 2

HI BEAM

OUTPUT 4

RR WIPER INT

INT VOLUME 3

—

—

TAIL LAMP

OUTPUT 5

INT VOLUME 2

RR WIPER

—

FR FOG

—

JPMIA0609GB

BCS-64

< SYSTEM DESCRIPTION >

[WITHOUT INTELLIGENT KEY SYSTEM]

SYSTEM

- 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 switch) is turned ON

• 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 switch, TAIL LAMP switch) are turned ON

JMMIA0326GB

JMMIA0394GB