Nissan Versa (N17): System

Body control system

BODY CONTROL SYSTEM : System Description

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 signal, 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 "COMBINATION SWITCH READING SYSTEM : System Diagram"
Signal buffer system	BCS "SIGNAL BUFFER : System Diagram"
Power consumption control system	BCS "POWER CONSUMPTION CONTROL SYSTEM : System Diagram"
Headlamp system	EXL "HEADLAMP SYSTEM : System Diagram"
Daytime running light system	EXL "WITH DAYTIME LIGHT SYSTEM : System Diagram"
Turn signal and hazard warning lamp system	EXL "TURN SIGNAL AND HAZARD WARNING LAMP SYSTEM : System Diagram"
Parking, license plate, side maker and tail lamps system	EXL "PARKING, LICENSE PLATE AND TAIL LAMP SYSTEM : System Diagram"
Exterior lamp battery saver system	EXL "HEADLAMP SYSTEM : System Description"
Interior room lamp control system	INL "INTERIOR ROOM LAMP CONTROL SYSTEM : System Diagram"
Interior room lamp battery saver system	INL "INTERIOR ROOM LAMP CONTROL SYSTEM : System Description"
Front wiper and washer system	WW "System Diagram"
Manual air conditioner system	HAC "MANUAL AIR CONDITIONING SYSTEM : System Diagram"
Warning chime system	WCS "WARNING CHIME SYSTEM : System Diagram"
Power door lock system	DLK "POWER DOOR LOCK SYSTEM : System Diagram"
Nissan vehicle immobilizer system-NATS (NVIS)	SEC"NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS : System Diagram"
Panic alarm	DLK "REMOTE KEYLESS ENTRY SYSTEM : System Diagram"
Rear window defogger system	DEF "System Diagram"
Remote keyless entry system	DLK "REMOTE KEYLESS ENTRY SYSTEM : System Diagram"
Power window system	PWC "System Diagram"

Combination switch reading system

COMBINATION SWITCH READING SYSTEM : System Diagram

COMBINATION SWITCH READING SYSTEM : System Description

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   

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

• 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.

SIGNAL BUFFER

SIGNAL BUFFER : System Diagram

SIGNAL BUFFER : System Description

OUTLINE

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

SIGNAL TRANSMISSION FUNCTION LIST                               

Power consumption control system

POWER CONSUMPTION CONTROL SYSTEM : System Diagram

POWER CONSUMPTION CONTROL SYSTEM : System Description

OUTLINE

• BCM incorporates a power saving 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 switches changes from 10 ms interval to 60 ms interval.

Sleep mode activation

• BCM receives the sleep-ready signal (ready) from IPDM E/R and combination meter via CAN communication.
• BCM transmits the sleep wake up signal (sleep) to each unit when all of the CAN sleep conditions are fulfilled.
• Each unit stops the transmission of CAN communication with the sleep wake up signal. BCM is in CAN communication sleep mode.
• BCM is in the low power consumption mode and performs the low power consumption control when all of the BCM sleep conditions are fulfilled with CAN sleep condition.

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

DIAGNOSIS SYSTEM (BCM)

COMMON ITEM

COMMON ITEM : CONSULT Function (BCM - COMMON ITEM)

APPLICATION ITEM

CONSULT performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions.

DOOR LOCK

DOOR LOCK : CONSULT Function (BCM - DOOR LOCK)

DATA MONITOR                   

ACTIVE TEST                               

WORK SUPPORT                       

* : Initial setting

REAR DEFOGGER

REAR DEFOGGER : CONSULT Function (BCM - REAR DEFOGGER)

DATA MONITOR                                   

ACTIVE TEST                   

BUZZER

BUZZER : CONSULT Function (BCM - BUZZER)

DATA MONITOR                   

ACTIVE TEST                           

INT LAMP

INT LAMP : CONSULT Function (BCM - INT LAMP)

DATA MONITOR                           

ACTIVE TEST               

WORK SUPPORT               

* : Initial setting

MULTI REMOTE ENT

MULTI REMOTE ENT : CONSULT Function (BCM - MULTI REMOTE ENT)

DATA MONITOR                   

ACTIVE TEST               

WORK SUPPORT               

*: Initial setting

HEADLAMP

HEADLAMP : CONSULT Function (BCM - HEAD LAMP)

DATA MONITOR           

ACTIVE TEST               

WORK SUPPORT           

* : Initial setting

WIPER

WIPER : CONSULT Function (BCM - WIPER)

DATA MONITOR                   

ACTIVE TEST                   

WORK SUPPORT                   

* : Initial setting

FLASHER

FLASHER : CONSULT Function (BCM - FLASHER)

DATA MONITOR               

ACTIVE TEST               

AIR CONDITIONER

AIR CONDITIONER : CONSULT Function (BCM - AIR CONDITIONER)

DATA MONITOR                       

COMB SW

COMB SW : CONSULT Function (BCM - COMB SW)

DATA MONITOR               

BCM

BCM : CONSULT Function (BCM - BCM)

ECU IDENTIFICATION

The BCM part number is displayed.

SELF DIAGNOSTIC RESULT

Refer to BCS "DTC Index".

WORK SUPPORT                       

CONFIGURATION

Refer to BCS "CONFIGURATION (BCM) : Description".

CAN DIAG SUPPORT MNTR

Refer to LAN "CAN Diagnostic Support Monitor".

IMMU

IMMU : CONSULT Function (BCM - IMMU)

SELF DIAGNOSTIC RESULT

Refer to BCS "DTC Index".

ACTIVE TEST                               

WORK SUPPORT                           

BATTERY SAVER

BATTERY SAVER : CONSULT Function (BCM - BATTERY SAVER)

DATA MONITOR               

ACTIVE TEST               

WORK SUPPORT               

* : Initial setting

TRUNK

TRUNK : CONSULT Function (BCM - TRUNK)

DATA MONITOR               

THEFT ALM

THEFT ALM : CONSULT Function (BCM - THEFT)

DATA MONITOR               

ACTIVE TEST               

WORK SUPPORT               

*: Initial setting

SIGNAL BUFFER

SIGNAL BUFFER : CONSULT Function (BCM - SIGNAL BUFFER)

DATA MONITOR               

ACTIVE TEST               

AIR PRESSURE MONITOR

AIR PRESSURE MONITOR : CONSULT Function (BCM - AIR PRESSURE MONITOR)

NOTE: The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information.

• Activate and display TPMS transmitter IDs
• Display tire pressure reported by the TPMS transmitter
• Read TPMS DTCs
• Register TPMS transmitter IDs
• Test remote keyless entry keyfob relative signal strength

SELF DIAGNOSTIC RESULT

NOTE: Before performing self diagnostic result, be sure to register the ID, or else the actual malfunction may be different from that displayed on CONSULT.

Refer to BCS "DTC Index".                       

DATA MONITOR                   

ACTIVE TEST                   

PANIC ALARM

PANIC ALARM : CONSULT Function (BCM - PANIC ALARM)

ACTIVE TEST                               

ECU DIAGNOSIS INFORMATION