Nissan Frontier D40. Instruction — part 50
BCS-10
< FUNCTION DIAGNOSIS >
COMBINATION SWITCH READING SYSTEM
1.
BCM M18, M19, M20 (view with low-
er instrument panel LH removed)
2.
Combination switch (lighting and
turn signal switch) M28
3.
Combination switch (wiper and
washer switch) M28
BCS
SIGNAL BUFFER SYSTEM
BCS-11
< FUNCTION DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
SIGNAL BUFFER SYSTEM
System Diagram
INFOID:0000000005275666
System Description
INFOID:0000000005275667
OUTLINE
BCM has the signal transmission function that outputs/transmits each input/received signal to each unit.
Signal transmission function list
ALMIA0263GB
Signal name
Input
Output
Description
Oil pressure switch signal
IPDM E/R (CAN)
Combination meter (CAN)
Transmits the received oil pres-
sure switch signal via CAN
communication.
BCS-12
< FUNCTION DIAGNOSIS >
POWER CONSUMPTION CONTROL SYSTEM
POWER CONSUMPTION CONTROL SYSTEM
System Diagram
INFOID:0000000005275668
System Description
INFOID:0000000005275669
OUTLINE
• BCM incorporates a power consumption 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 each switches changes from 10 ms interval to 20 ms interval.
Sleep mode activation
• BCM receives the sleep-ready signal (ready) from IPDM E/R and combination meter via CAN communica-
tion.
• BCM transmits the sleep wake up signal (sleep) to each unit when all of the CAN sleep conditions are ful-
filled.
• Each unit stops the transmission of CAN communication with the sleep wake up signal. BCM is in CAN com-
munication sleep mode.
• BCM is in the low power consumption mode and perform the low power consumption control when all of the
BCM sleep conditions are fulfilled with CAN sleep condition.
ALMIA0300GB
BCS
POWER CONSUMPTION CONTROL SYSTEM
BCS-13
< FUNCTION DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
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 trans-
mits wake up signals to BCM with CAN communication to convey the start of CAN communication.
Wake-up condition
Component Parts Location
INFOID:0000000005275670
CAN sleep condition
BCM sleep condition
• Receiving the sleep-ready signal (ready) from all units
• Ignition switch: OFF
• Vehicle security system alarm: No operation
• Warning lamp: No operation
• Warning chime: No operation
• Stop lamp switch: OFF
• Key switch status: No change for 2 seconds
• Hazard warning lamp: No operation
• Exterior lamp: OFF
• Door lock status: No change for 2 seconds
• CONSULT-III communication status: No communication
• Door switch status: No change for 2 seconds
The controls only BCM are completed.
(Interior room lamp battery saver: Time out etc.)
BCM wake-up condition
• Ignition switch: OFF
→
ACC or ON
• Stop lamp switch: ON (Depress brake pedal)
• Any door switch: OFF
→
ON
• Lighting switch: OFF
→
1ST or PASS
• Hazard switch: OFF
→
ON
• Remote keyless entry receiver: Receiving (with remote keyless entry)
1.
BCM M18, M19, M20 (view with low-
er instrument panel LH removed)
2.
Combination meter M24
3.
IPDM E/R
ALMIA0408ZZ
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