Body Control System: Overview Nissan Armada I facelift

ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Description

When replacing BCM, save or print current vehicle specification with CONSULT-III configuration before replacement.

Configuration has three functions as follows

1. READ CONFIGURATION is the function to read (extract) vehicle configuration of current BCM.
2. WRITE CONFIGURATION - Manual selection is the function to select and write vehicle configuration on BCM manually.
3. WRITE CONFIGURATION - Config file is the function to write vehicle configuration with the data extracted from current BCM.

CONFIGURATION : Description

Vehicle specification needs to be written with CONSULT-III because it is not written after replacing BCM.

Configuration has three functions as follows

1. READ CONFIGURATION is the function to read (extract) vehicle configuration of current BCM.
2. WRITE CONFIGURATION - Manual selection is the function to select and write vehicle configuration on BCM manually.
3. WRITE CONFIGURATION - Config file is the function to write vehicle configuration with the data extracted from current BCM.

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".

Scheme 52

Example 1: When a switch (TURN RH switch) is turned ON

1. The circuit between INPUT 1 and OUTPUT 5 is formed when the TURN RH switch is turned ON.
2. BCM detects the combination switch status signal "1E" when the signal of OUTPUT 5 is input to INPUT 1.
3. BCM judges that the TURN RH switch is ON when the signal "1E" is detected.

Example 2: When some switches (turn RH switch, front wiper LO switch) are turned ON

Scheme 53

1. The circuits between INPUT 1 and OUTPUT 5 and between INPUT 1 and OUTPUT 3 are formed when the TURN RH switch and FR WIPER LOW switch are turned ON.
2. BCM detects the combination switch status signal "1CE" when the signals of OUTPUT 3 and OUTPUT 5 are input to INPUT 1.
3. BCM judges that the TURN RH switch and FR WIPER LOW switch are ON when the signal "1CE" 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.

VOLUME SWITCH ON/OFF STATUS

Scheme 54

Scheme 55

Wake-up operation

1. 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.
2. 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.

Wake-up condition

BCM WAKE-UP CONDITION

Scheme 56

DESCRIPTION

During driving, the TPMS receives the signal transmitted from the transmitter installed in each wheel, when the tire pressure becomes low. The control unit (BCM) of this system has pressure judgment and trouble diagnosis functions.

When the TPMS detects low inflation pressure or another unusual symptom, the warning lamps in the combination meter comes on.

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern vehicle is equipped with many electronic control unit, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to " CAN COMMUNICATION SIGNAL CHART ".

See also:
• DOOR LOCK AND UNLOCK SWITCH : SYSTEM DIAGRAM