Nissan Sentra. Instruction — 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
INFOID:0000000009757355
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
Instruction air conditioner system
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
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
Remote keyless entry system
DLK-217, "REMOTE KEYLESS ENTRY SYSTEM : System De-
scription"
Power window system
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 >
[WITHOUT INTELLIGENT KEY SYSTEM]
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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
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