Infiniti M35/M45 Y50. Manual — part 1151
FRONT WIPER AND WASHER SYSTEM
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Sample Operation: (When Wiper Switch Turned to LO Position)
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When wiper switch is turned to LO position, front wiper LO contact in combination switch turns ON. At this
time if OUTPUT 1 transistor is activated, BCM detects that voltage changes in INPUT 3.
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When BCM detects that voltage changes in INPUT 3 while OUTPUT 1 transistor is ON, it judges that front
wiper switch is in LO position. Then BCM sends front wiper request signal (LO) to IPDM E/R using CAN
communication.
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If BCM detects that voltage changes in INPUT 3 when OUTPUT 1 transistor is activated again, it recog-
nizes that wiper switch is still in LO position.
NOTE:
Each OUTPUT terminal transistor is activated at 10 ms intervals. Therefore after switch is turned ON, electri-
cal loads are activated with time delay. But this time delay is so short that it cannot be detected by human
senses.
PKID0469E
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FRONT WIPER AND WASHER SYSTEM
Operation Mode
Combination switch reading function has operation modes shown below.
1.
Normal status
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When BCM is not in sleep status, OUTPUT terminals (1-5) each turn ON-OFF every 10 ms.
2.
Sleep status
–
When BCM is in sleep status, transistors of OUTPUT 1 and 5 stop the output, and BCM enters low current
consumption mode. OUTPUT 2, 3, and 4 turn ON-OFF every 60 ms, and only input from lighting switch
system is accepted.
PKIC0272E
FRONT WIPER AND WASHER SYSTEM
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Wiper Dial Position Setting
Front wiper intermittent operation delay interval is determined from a combination of 3 switches (intermittent
operation dial position 1, 2, and 3) and vehicle speed signal.
After each intermittent operation delay interval, BCM sends front wiper request signal to IPDM E/R.
Example: For wiper dial position 1
Using combination switch reading function, BCM detects ON/OFF status of intermittent operation dial posi-
tions 1, 2, and 3.
When combination switch status is as listed below, BCM determines that it is wiper dial position 1.
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Intermittent operation dial position 1: ON (Continuity exists between combination switch output 3 and input
1.)
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Intermittent operation dial position 2: ON (Continuity exists between combination switch output 5 and input
1.)
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Intermittent operation dial position 3: ON (Continuity exists between combination switch output 4 and input
2.)
BCM determines front wiper intermittent operation delay interval from wiper dial position and vehicle speed,
and sends wiper request signal (INT) to IPDM E/R.
CAN Communication System Description
NKS003WD
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-board multi-
plex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, 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 Unit
NKS003WE
Refer to
LAN-50, "CAN System Specification Chart"
.
Wiper dial position
Intermittent operation
interval
Combination switch
Intermittent operation
dial position 1
Intermittent operation
dial position 2
Intermittent operation
dial position 3
1
Short
↑
↓
Long
ON
ON
ON
2
ON
ON
OFF
3
ON
OFF
OFF
4
OFF
OFF
OFF
5
OFF
OFF
ON
6
OFF
ON
ON
7
OFF
ON
OFF
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FRONT WIPER AND WASHER SYSTEM
Schematic
NKS003WF
TKWT5089E
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