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Infiniti G35 (V35). Manual - part 799

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FRONT WIPER AND WASHER SYSTEM

PFP:28810

Components Parts and Harness Connector Location

NKS000LU

System Description

NKS000LV

●

All front wiper relays (HI, LO) are included in IPDM E/R (intelligent power distribution module engine
room).

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Wiper switch (combination switch) is composed of a combination of 5 output terminals and 5 input termi-
nals. Terminal combination status is read by BCM (body control module) when switch is turned ON.

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BCM controls front wiper LO, HI, and INT (intermittent) operation.

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IPDM E/R operates wiper motor according to CAN communication signals from BCM.

OUT LINE

Power is supplied at all times

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to ignition relay located in IPDM E/R, from battery direct,

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through 50 A fusible link (letter F, located in fuse, fusible link and relay box)

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to BCM terminal 55,

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through 10 A fuse [No.18 located in fuse block (J/B)]

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to BCM terminal 42,

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through 20 A fuse (No.73 located in IPDM E/R)

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to front wiper relay located in IPDM E/R,

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through 15 A fuse (No.78 located in IPDM E/R)

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to CPU located in IPDM E/R,

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through 10 A fuse (No.71 located in IPDM E/R)

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to CPU located in IPDM E/R.

PKIC6340E

FRONT WIPER AND WASHER SYSTEM

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With the ignition switch in the ON or START position, power is supplied

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through ignition relay located in IPDM E/R

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to front wiper relay located in IPDM E/R

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to front wiper high relay located in IPDM E/R and

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to CPU located in IPDM E/R,

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through 10 A fuse [No.1 located in fuse block (J/B)]

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to BCM terminal 38,

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through 10 A fuse (No.84 located in IPDM E/R)

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through IPDM E/R terminal 44

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to front washer motor terminal 2.

Ground is supplied

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to BCM terminal 52 and

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to combination switch terminal 12

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through grounds M30 and M66,

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to IPDM E/R terminals 38 and 60

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through grounds E17 and E43.

LOW SPEED WIPER OPERATION

When the front wiper switch is in LOW position, BCM detect low speed wiper ON signal by BCM wiper switch
reading function.
BCM sent front wiper request signal (LOW) with CAN communication line

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from BCM terminals 39 and 40

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to IPDM E/R terminals 48 and 49.

When the IPDM E/R receives front wiper request signal (LOW), it turns ON front wiper relay, located in the
IPDM E/R, power is supplied

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through IPDM E/R terminal 21 and front wiper high relay and front wiper relay

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to front wiper motor terminal 3.

Ground is supplied

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to front wiper motor terminal 2

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through grounds E17 and E43.

with power and ground is supplied, front wiper motor operates at low speed.

HIGH SPEED WIPER OPERATION

When the front wiper switch is in HI position, BCM detect high speed wiper ON signal by BCM wiper switch
reading function.
BCM sent front wiper request signal (HI) with CAN communication line

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from BCM terminals 39 and 40

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to IPDM E/R terminals 48 and 49.

When the IPDM E/R receives front wiper request signal (HI), it turns ON front wiper relay, located in IPDM E/
R, power is supplied

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through IPDM E/R terminal 31 and front wiper high relay and front wiper relay

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to front wiper motor terminal 5.

Ground is supplied

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to front wiper motor terminal 2

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through grounds E17 and E43.

with power and ground is supplied, front wiper motor operates at high speed.

INTERMITTENT OPERATION

Front wiper intermittent operation delay interval is determined from a combination of 3 switches (intermittent
operation INT VOLUME 1, 2, and 3) and vehicle speed signal.
After each intermittent operation delay interval, BCM sends front wiper request signal to IPDM E/R.

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FRONT WIPER AND WASHER SYSTEM

Wiper Intermittent Dial Position Setting

Example: For wiper intermittent dial position 1
Using combination switch reading function, BCM detects ON/OFF status of intermittent operation INT VOL-
UME 1, 2, and 3.
When combination switch status is as listed below, BCM determines that it is wiper Intermittent dial position 1.

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Intermittent operation INT VOLUME 1: ON (Continuity exists between combination switch output 3 and
input 1.)

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Intermittent operation INT VOLUME 2: ON (Continuity exists between combination switch output 5 and
input 1.)

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Intermittent operation INT VOLUME 3: ON (Continuity exists between combination switch output 4 and
input 2.)

BCM determines front wiper intermittent operation delay interval from wiper Intermittent dial position and vehi-
cle speed, and sends wiper request signal (INT) to IPDM E/R.

AUTO STOP OPERATION

With wiper switch turned OFF, wiper motor will continue to operate until wiper arms reach windshield base.
When the wiper arms are not located at base of windshield with wiper switch OFF, ground is provided

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from IPDM E/R terminal 21

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to front wiper motor terminal 3, in order to continue wiper motor operation at low speed,

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to IPDM E/R terminal 32

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through front wiper motor terminals 4 and 2

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through grounds E17 and E43.

When the wiper arms reach base of windshield, front wiper motor terminals 4 and 2 are connected, and
ground is supplied
Then the IPDM E/R sends auto stop operation signal to BCM with CAN communication line.
When the BCM receives auto-stop operation signal, BCM sends wiper stop signal to IPDM E/R with CAN com-
munication line.
IPDM E/R stops wiper motor. Wiper motor will then stop wiper arms at the STOP position.

WASHER OPERATION

When the wiper switch is in front wiper washer position, BCM detect front wiper washer signal by BCM wiper
switch reading function. (Refer to

WW-7, "COMBINATION SWITCH READING FUNCTION"

)

Combination switch ground is supplied

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to front washer pump terminal 1

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through combination switch terminal 11

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through combination switch terminal 12

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through grounds M30 and M66.

With ground is supplied, front washer pump is operated.
When the BCM detects that front washer pump has operated for 0.4 seconds or longer, BCM operates front
wiper motor for low speed.
When the BCM detects washer switch is OFF, low speed operation cycles approximately 3 times and stops.

MIST OPERATION

When the wiper switch is turned to the mist position, wiper low speed operation cycles once and then stops.

Wiper dial position

Intermittent operation

interval

Combination switch

Intermittent operation

dial position 1

Intermittent operation

dial position 2

Intermittent operation

dial position 3

Short

↑

↓

Long

OFF

FRONT WIPER AND WASHER SYSTEM

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For additional information about wiper operation under this condition, refer to

WW-5, "LOW SPEED WIPER

OPERATION"

If switch is held in mist position, low speed operation continues.

FAIL-SAFE FUNCTION

If an abnormality occurs in CAN communications, IPDM E/R holds the condition just before fail-safe status is
initiated until ignition switch is turned OFF. (If wipers were operating in LO just before the initiation of fail-safe
status, they continue to operate in LO until ignition switch is turned OFF.)

COMBINATION SWITCH READING FUNCTION
Description

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BCM reads combination switch (wiper) status, and controls related systems such as headlamps and wip-
ers, according to the results.

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BCM reads information of a maximum of 20 switches by combining five output terminals (OUTPUT 1-5)
and five input terminals (INPUT 1-5).

Operation Description

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BCM activates transistors of output terminals (OUTPUT 1-5) periodically, and allows current to flow in
turn.

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If any (1 or more) switches are turned ON, circuit of output terminals (OUTPUT 1-5) and input terminals
(INPUT 1-5) becomes active.

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At this time, transistors of output terminals (OUTPUT 1-5) are activated to allow current to flow. When volt-
age of input terminals (INPUT 1-5) corresponding to that switch changes, interface in BCM detects volt-
age change, and BCM determines that switch is ON.

PKIC6010E

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