Nissan Leaf. Manual — part 153
BCS-6
< SYSTEM DESCRIPTION >
SYSTEM
SYSTEM
BODY CONTROL SYSTEM
BODY CONTROL SYSTEM : System Description
INFOID:0000000010122302
OUTLINE
• BCM (Body Control Module) controls the various electrical components. It inputs the information required to
the control from CAN communication and the signal received from each switch and sensor.
• BCM has combination switch reading function for reading the operation status of combination switches (light,
turn signal, wiper and washer) in addition to a function for controlling the operation of various electrical com-
ponents. It also has the signal transmission function as the passed point of signal and the power saving con-
trol function that reduces the power consumption with the power switch OFF.
• BCM is equipped with the diagnosis function that performs the diagnosis with CONSULT and various set-
tings.
BCM CONTROL FUNCTION LIST
System
Reference
Combination switch reading system
BCS-8, "COMBINATION SWITCH READING SYSTEM : System
Description"
Signal buffer system
BCS-11, "SIGNAL BUFFER SYSTEM : System Description"
Power consumption control system
BCS-12, "POWER CONSUMPTION CONTROL SYSTEM : Sys-
tem Description"
Headlamp system
EXL-14, "HEADLAMP SYSTEM : System Description"
Auto light system
EXL-15, "AUTO LIGHT SYSTEM (EXCEPT FOR CANADA) :
System Description"
Daytime running light system
EXL-18, "DAYTIME RUNNING LIGHT SYSTEM : System De-
scription"
Turn signal and hazard warning lamp system
EXL-19, "TURN SIGNAL AND HAZARD WARNING LAMP SYS-
TEM : System Description"
Parking, license plate, side marker and tail lamps system
EXL-20, "PARKING, LICENSE PLATE, SIDE MARKER AND
TAIL LAMP SYSTEM : System Description"
Front fog lamp system
EXL-21, "FRONT FOG LAMP SYSTEM : System Description"
Exterior lamp battery saver system
EXL-22, "EXTERIOR LAMP BATTERY SAVER SYSTEM : Sys-
tem Description"
Interior room lamp control system
INL-8, "INTERIOR ROOM LAMP CONTROL SYSTEM : System
Description"
Interior room lamp battery saver system
INL-10, "INTERIOR ROOM LAMP BATTERY SAVER SYSTEM :
System Description"
Front wiper and washer system
WW-8, "FRONT WIPER AND WASHER SYSTEM : System De-
scription"
Rear wiper and washer system
WW-11, "REAR WIPER AND WASHER SYSTEM : System De-
scription"
Warning chime system
WCS-6, "WARNING CHIME SYSTEM : System Description"
Power door lock system
Intelligent Key system
DLK-24, "INTELLIGENT KEY SYSTEM : System Description"
Back door opener system
Nissan Vehicle Immobilizer System (NVIS) - NATS
SEC-15, "NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS :
System Description"
Vehicle security system
•
SEC-18, "VEHICLE SECURITY SYSTEM : System Descrip-
tion (Except for Canada)"
•
SEC-21, "VEHICLE SECURITY SYSTEM : System Descrip-
tion (For Canada)"
Rear window defogger system
BCS
SYSTEM
BCS-7
< SYSTEM DESCRIPTION >
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BODY CONTROL SYSTEM : Fail-safe
INFOID:0000000010563538
FAIL-SAFE CONTROL BY DTC
BCM performs fail-safe control when any DTC are detected.
*: “ECM” is indicated on CONSULT display, however this means VCM on this vehicle.
REAR WIPER MOTOR PROTECTION
BCM detects the rear wiper stopping position according to the rear wiper stop position signal.
When the rear wiper stop position signal does not change for more than 5 seconds while driving the rear
wiper, BCM stops power supply to protect the rear wiper motor.
Condition of cancellation
1. More than 1 minute is passed after the rear wiper stop.
2. Turn rear wiper switch OFF.
3. Operate the rear wiper switch or rear washer switch.
FAIL-SAFE CONTROL OF COMBINATION SWITCH READING FUNCTION CAUSED BY LOW
POWER SUPPLY VOLTAGE
If voltage of battery power supply lower, BCM maintains combination switch reading to the status when input
voltage is less than approximately 9 V.
NOTE:
When voltage of battery power supply is approximately 9 V or more, combination switch reading function
returns to normal operation.
COMBINATION SWITCH READING SYSTEM
Power window system [Retained accessory power (RAP function)]
Tire pressure monitoring system
System
Reference
Display contents of CONSULT
Fail-safe
Cancellation
B2192: ID DISCORD BCM-ECM*
Inhibit setting the vehi-
cle to READY
Erase DTC
B2193: CHAIN OF BCM-ECM*
Inhibit setting the vehi-
cle to READY
Erase DTC
B2195: ANTI-SCANNING
Inhibit setting the vehi-
cle to READY
Power switch ON
→ OFF
B2196: DONGLE NG
Inhibit setting the vehi-
cle to READY
Erase DTC
B2198: IMMOBI ANT NG
Inhibit setting the vehi-
cle to READY
Erase DTC
B261E: FUEL MIS CONFIG
Inhibit setting the vehi-
cle to READY
When the VCM status signal is normally received from VCM.
B26F1: IGN RELAY OFF STUCK
Inhibit setting the vehi-
cle to READY
When the following conditions are fulfilled
• Power switch ON signal (CAN: Transmitted from BCM): ON
• Power switch ON signal (CAN: Transmitted from IPDM E/R): ON
B26F2: IGN RELAY ON STUCK
Inhibit setting the vehi-
cle to READY
When the following conditions are fulfilled
• Power switch ON signal (CAN: Transmitted from BCM): OFF
• Power switch ON signal (CAN: Transmitted from IPDM E/R): OFF
B26F7: LF DRIVER COMMUNI-
CATION
Inhibit setting the vehi-
cle to READY
When inside key antennas function normally
U0415: VDC CAN CIRC2
Inhibit setting the vehi-
cle to READY
When vehicle speed signal (Meter) (CAN) is received normally
BCS-8
< SYSTEM DESCRIPTION >
SYSTEM
COMBINATION SWITCH READING SYSTEM : System Description
INFOID:0000000010122304
SYSTEM DIAGRAM
NOTE:
*: TAIL LAMP switch links lighting switch 1ST and 2ND positions.
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
Combination switch circuit
NOTE:
*: TAIL LAMP switch links lighting switch 1ST and 2ND positions.
Combination switch INPUT-OUTPUT system list
JMMIA0636GB
JMMIA0637GB
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
BCS
SYSTEM
BCS-9
< SYSTEM DESCRIPTION >
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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.
- 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
OUTPUT 4
RR WIPER INT
INT VOLUME 3
AUTO LIGHT
—
TAIL LAMP
OUTPUT 5
INT VOLUME 2
RR WIPER ON
—
FR FOG
—
System
INPUT 1
INPUT 2
INPUT 3
INPUT 4
INPUT 5
JPMIA0609GB
JMMIA0326GB
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