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WIPER, WASHER & HORN

K ELECTRICAL

SECTION
WIPER, WASHER & HORN
WW B

E
CONTENTS
PRECAUTION ........................................................... 3 . Only Front Wiper Hi Does Not Operate ................. 30 . F
Precautions for Supplemental Restraint System Only Front Wiper Intermittent Does Not Operate ... 32
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Front Wiper Intermittent Operation Switch Position
SIONER" ................................................................. 3
. Cannot Be Adjusted ............................................... 32 . G
Precautions for Procedures without Cowl Top Cover 3 ..... Wiper Does Not Wipe When Front Washer Operates
FRONT WIPER AND WASHER SYSTEM ................. 4 . ... 32
Components Parts and Harness Connector Loca- After Front Wiper Operate for 10 Seconds, They
H
tion .......................................................................... 4
. Stop for 20 Seconds, and after Repeating the Oper-
System Description ................................................. 4 . ations Five Times, They Become Inoperative ....... 33 .
OUTLINE .............................................................. 4
. Front Wiper Does Not Stop .................................... 34 .
LOW SPEED WIPER OPERATION ..................... 5 . Removal and Installation of Front Wiper Arms, I
HIGH SPEED WIPER OPERATION .................... 5 . Adjustment of Wiper Arms Stop Location .............. 35 .
INTERMITTENT OPERATION ............................. 6 . REMOVAL .......................................................... 35 .
AUTO STOP OPERATION ................................... 6 . INSTALLATION .................................................. 35 . J
WASHER OPERATION ........................................ 7 . ADJUSTMENT ................................................... 35 .
MIST OPERATION ............................................... 7 . Removal and Installation of Front Wiper Motor and
FAIL-SAFE FUNCTION ........................................ 7 . Linkage .................................................................. 35
.
WW
COMBINATION SWITCH READING FUNCTION 8 ..... REMOVAL .......................................................... 35 .
CAN Communication System Description ............. 10 . INSTALLATION .................................................. 36 .
CAN Communication Unit ..................................... 10 . Disassembly and Assembly of Front Wiper Motor
Schematic ..............................................................11. and Linkage ........................................................... 36
. L
Wiring Diagram -- WIPER -- ............................... 12 . DISASSEMBLY .................................................. 36 .
Terminals and Reference Values for BCM ............ 15 . ASSEMBLY ........................................................ 36 .
Terminals and Reference Values for IPDM E/R .... 18 . Washer Nozzle Adjustment ................................... 37 . M
How to Proceed with Trouble Diagnosis ............... 19 . Washer Tube Layout ............................................. 38 .
Preliminary Check ................................................. 19 . Removal and Installation of Front Washer Nozzle... 38
CHECK POWER SUPPLY AND GROUND CIR- REMOVAL .......................................................... 38 .
CUIT ................................................................... 19
. INSTALLATION .................................................. 38 .
CONSULT-II Functions (BCM) .............................. 21 . Inspection for Washer Nozzle ................................ 38 .
CONSULT-II BASIC OPERATION ...................... 21 . CHECK VALVE INSPECTION ............................ 38 .
WORK SUPPORT .............................................. 22 . Removal and Installation of Front Wiper and Washer
DATA MONITOR ................................................ 22 . Switch .................................................................... 39
.
ACTIVE TEST .................................................... 23 . REMOVAL .......................................................... 39 .
CONSULT-II Functions (IPDM E/R) ...................... 24 . INSTALLATION .................................................. 39 .
CONSULT-II BASIC OPERATION ...................... 24 . Removal and Installation of Washer Tank ............. 39 .
DATA MONITOR ................................................ 25 . REMOVAL .......................................................... 39 .
ACTIVE TEST .................................................... 25 . INSTALLATION .................................................. 39 .
Front Wiper Does Not Operate ............................. 26 . Removal and Installation of Washer Pump ............ 40 .
Front Wiper Does Not Return to Stop Position ...... 28 . REMOVAL .......................................................... 40 .
Only Front Wiper Low Does Not Operate ............. 29 . INSTALLATION .................................................. 40 .

Revision: 2005 September WW-1 2006 Murano
REAR WIPER AND WASHER SYSTEM ................. 41 . REMOVAL ...........................................................54 .
Components Parts and Harness Connector Loca- INSTALLATION ...................................................54 .
tion ......................................................................... 41
. Removal and Installation of Rear Wiper Blade ......55 .
System Description ................................................ 41 . REMOVAL ...........................................................55 .
OUT LINE ........................................................... 41 . INSTALLATION ...................................................55 .
REAR WIPER ON OPERATION ......................... 42 . Washer Nozzle Adjustment ....................................55 .
INTERMITTENT OPERATION ........................... 42 . Washer Tube Layout ..............................................56 .
AUTO STOP OPERATION ................................. 42 . Removal and Installation of Rear Washer Nozzle...56
WASHER OPERATION ...................................... 42 . Check Valve Inspection ..........................................57 .
BCM WIPER SWITCH READING FUNCTION ... 42 Removal and Installation of Rear Wiper and Washer
Wiring Diagram -- WIP/ R -- ................................ 43 . Switch ....................................................................57
.
Terminals and Reference Values for BCM ............. 45 . Removal and Installation of Washer Tank ..............57 .
How to Proceed with Trouble Diagnosis ................ 46 . Removal and Installation of Washer Pump ............57 .
Preliminary Check ................................................. 47 . POWER SOCKET ....................................................58 .
CHECK POWER SUPPLY AND GROUND CIR- Wiring Diagram -- P/SCKT -- ...............................58 .
CUIT ................................................................... 47
. Removal and Installation of Instrument Power
CONSULT-II Functions (BCM) ............................... 48 . Socket ....................................................................59
.
CONSULT-II BASIC OPERATION ...................... 48 . REMOVAL ...........................................................59 .
DATA MONITOR ................................................. 49 . INSTALLATION ...................................................59 .
ACTIVE TEST .................................................... 49 . Removal and Installation of Luggage Room Power
Rear Wiper Does Not Operate .............................. 50 . Socket ....................................................................59
.
Rear Wiper Does Not Return to Stop Position ....... 51 . REMOVAL ...........................................................59 .
Only Rear Wiper ON Does Not Operate ................ 52 . INSTALLATION ...................................................59 .
Only Rear Wiper INT Does Not Operate ............... 52 . Removal and Installation of Console Power Socket...59
Wiper Does Not Wipe When Rear Washer Operates 52 ... REMOVAL ...........................................................59 .
Rear Wiper Do Not Stop ........................................ 53 . INSTALLATION ...................................................59 .
Removal and Installation of Rear Wiper Arm, Adjust- HORN .......................................................................60
.
ment of Wiper Arms Stop Location ........................ 53 . Wiring Diagram -- HORN -- .................................60 .
REMOVAL .......................................................... 53 . Removal and Installation ........................................61 .
INSTALLATION ................................................... 53 . REMOVAL ...........................................................61 .
ADJUSTMENT ................................................... 53 . INSTALLATION ...................................................61 .
Removal and Installation of Rear Wiper Motor ...... 54 .

Revision: 2005 September WW-2 2006 Murano
PRECAUTION

PRECAUTION PFP:00011
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" NKS001TO

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front C
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING: D
q To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer. E
q Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section. F
q Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
G
Precautions for Procedures without Cowl Top Cover NKS002TY

When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc. H

PIIB3706J
WW

Revision: 2005 September WW-3 2006 Murano
FRONT WIPER AND WASHER SYSTEM

FRONT WIPER AND WASHER SYSTEM PFP:28810

Components Parts and Harness Connector Location NKS001TQ

PKIC7611E

System Description NKS001TR

q BCM (Body Control Module) controls front wiper low, high and intermittent operation.
q IPDM E/R (Intelligent Power Distribution Module Engine Room) operates front wiper motor according to
CAN communication signals from BCM.
OUTLINE
Power is supplied at all times
q to ignition relay located in IPDM E/R, from battery direct,
q through 30 A fuse (No. 73 located in IPDM E/R)
q to front wiper relay located in IPDM E/R,
q through 15 A fuse (No. 78 located in IPDM E/R)
q to CPU located in IPDM E/R,
q through 10 A fuse (No. 71, located in IPDM E/R)
q to CPU located in IPDM E/R,
q through 50 A fusible link (letter F, located in fuse and fusible link block)
q to BCM terminal 55,
q through 10 A fuse [No. 18 located in fuse block (J/B)]
q to BCM terminal 42.
When the ignition switch ON or START position, power is supplied
q to ignition relay located in IPDM E/R, from battery direct,

Revision: 2005 September WW-4 2006 Murano
FRONT WIPER AND WASHER SYSTEM

q through 10 A fuse [No. 1 located in fuse block (J/B)]
q to BCM terminal 38, A
q through 10 A fuse (No. 84 located in IPDM E/R)
q through IPDM E/R terminal 44
B
q to combination switch terminal 14.
Ground is supplied
q to BCM terminal 52 C
q through grounds M14 and M78,
q to IPDM E/R terminals 38 and 60
q through grounds E13, E26 and E28, D
q to combination switch terminal 12
q through grounds M14 and M78.
E
LOW SPEED WIPER OPERATION
When the front wiper switch is in LO position, BCM detects the FR WIPER LOW (ON) by BCM combination
switch reading function. BCM sends front wiper request signal (LO) through CAN communication.
When receiving front wiper request signal (LO), IPDM E/R turns ON front wiper relay in IPDM E/R. IPDM E/R F
supplies power
q through IPDM E/R terminal 21, front wiper high relay and front wiper relay
q to front wiper motor terminal 3. G
Ground is supplied
q to front wiper motor terminal 1
H
q through grounds E13, E26 and E28.
With power and ground is supplied, the front wiper motor operates at low speed.
HIGH SPEED WIPER OPERATION I
When the front wiper switch is in HI position, BCM detects the FR WIPER HI (HI) by BCM combination switch
reading function. BCM sends front wiper request signal (HI) through CAN communication.
When receiving front wiper request signal (HI), IPDM E/R turns ON front wiper relay and front wiper high relay J
in IPDM E/R. IPDM E/R supplies power
q through IPDM E/R terminal 31, front wiper high relay and front wiper relay
q to front wiper motor terminal 2. WW
Ground is supplied
q to front wiper motor terminal 1
q through grounds E13, E26 and E28. L
With power and ground is supplied, the front wiper motor operates at high speed.

Revision: 2005 September WW-5 2006 Murano
FRONT WIPER AND WASHER SYSTEM

INTERMITTENT OPERATION
Front wiper intermittent operation is determined from a combination of 3 switches (INT VOLUME 1, 2, and 3)
and vehicle speed signal*.
When the front wiper switch is in INT position, BCM detects the FR WIPER INT (ON) and ON/OFF status of
the INT VOLUME 1, 2, and 3 by BCM combination switch reading function. BCM judges the condition of wiper
intermittent dial position by ON/OFF status of INT VOLUME 1, 2, and 3 .
BCM sends front wiper request signal (1LOW) at certain intervals through CAN communication. The interval is
calculated by wiper intermittent dial position and vehicle speed signal received from combination meter
through CAN communication.
When receiving front wiper request signal (1LOW), IPDM E/R turns ON front wiper relay in IPDM E/R, and
operates front wiper motor at low speed. Then IPDM E/R detects wiper arms reach to the stop position via
wiper auto stop signal from front wiper motor, IPDM E/R turns OFF front wiper relay, and sends front wiper
auto stop signal (ON) to BCM through CAN communication, and controls intermittent operation.
Wiper Intermittent Dial Position Setting
Wiper intermittent dial Intermittent operation Combination switch
position interval INT VOLUME 1 INT VOLUME 2 INT VOLUME 3
1 Short ON ON ON
2 ON ON OFF
3 ON OFF OFF

4 OFF OFF OFF

5 OFF OFF ON
6 OFF ON ON
7 Long OFF ON OFF

Example: For wiper intermittent dial position 1
Using combination switch reading function, BCM detects ON/OFF status of INT VOLUME 1, 2, and 3.
When combination switch status is as listed below, BCM determines that it is wiper Intermittent dial position 1.
q INT VOLUME 1: ON (Continuity exists between combination switch output 3 and input 1.)
q INT VOLUME 2: ON (Continuity exists between combination switch output 5 and input 1.)
q INT VOLUME 3: ON (Continuity exists between combination switch output 4 and input 2.)
BCM determines front wiper intermittent operation interval from wiper dial position 1 and vehicle speed*, and
sends wiper request signal (INT) to IPDM E/R.
*: Vehicle-speed-sensing intermittent wiper function reads vehicle speed signal when the function is ON. It is
set in OFF at the factory shipment. Vehicle-speed-sensing intermittent wiper function ON/OFF can be
changed by the CONSULT-II. Refer to WW-22, "WORK SUPPORT" .
AUTO STOP OPERATION
With wiper switch turned OFF, wiper motor will continue to operate until wiper arms reach windshield base.
When wiper arms are not located at base of windshield with wiper switch OFF, power is provided
q from IPDM E/R terminal 21
q to front wiper motor terminal 3, in order to continue wiper motor operation at low speed.
When wiper arms reach base of windshield, front wiper motor terminals 1 and 4 are connected, and ground is
supplied
q to IPDM E/R terminal 32
q through front wiper motor terminal 4
q through front wiper motor terminal 1
q through grounds E13, E26 and E28.
Then the IPDM E/R sends front wiper auto stop signal (ON) to BCM with CAN communication line.
When the BCM receives front wiper auto stop signal (ON), BCM sends front wiper request signal (OFF) to
IPDM E/R with CAN communication line.
IPDM E/R stops wiper motor. Wiper motor will then stop wiper arms at the STOP position.

Revision: 2005 September WW-6 2006 Murano
FRONT WIPER AND WASHER SYSTEM

WASHER OPERATION
When the front washer switch is ON position, front and rear washer pump operates, and BCM detects the FR A
WASHER (ON) by BCM combination switch reading function. Combination switch supplies power
q through combination switch terminal 13
q to front and rear washer pump terminal 1 B
Ground is supplied
q to front and rear washer pump terminal 2
C
q through combination switch terminal 11
q to combination switch terminal 12
q through grounds M14 and M78. D
When BCM detects the FR WASHER (ON) for 0.4 seconds or longer, BCM sends front wiper request signal
(LO) through CAN communication. IPDM E/R operates front wiper motor at low speed.
When BCM detects the front washer switch is OFF, low speed wiper operation cycles approximately 2 times
E
and stops.
MIST OPERATION
When the wiper switch is turned to the mist position, wiper low speed operation cycles once and then stops. F
For additional information about wiper operation under this condition. Refer to WW-5, "LOW SPEED WIPER
OPERATION" .
If the switch is held in the mist position, low speed operation continues.
G
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 H
status, they continue to operate in LO until ignition switch is turned OFF.)

Revision: 2005 September WW-7 2006 Murano
FRONT WIPER AND WASHER SYSTEM

COMBINATION SWITCH READING FUNCTION
Description
q BCM reads combination switch (wiper) status, and controls related systems such as head lamps and wip-
ers, according to the results.
q 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
q BCM activates transistors of output terminals (OUTPUT 1-5) periodically and, and allows current to flow in
turn.
q If any (1 or more) switches are turned ON, circuit of output terminals (OUTPUT 1-5) and input terminals
(INPUT 1-5) becomes active.
q 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.

SKIB7831E

Revision: 2005 September WW-8 2006 Murano
FRONT WIPER AND WASHER SYSTEM

BCM - Operation Table of Combination Switches
BCM reads operation status of combination switch using combinations shown in table below. A

SKIA4959E G
Sample Operation: (When Wiper Switch Turned to LOW Position)
q When wiper switch is turned to LOW position, front wiper LOW contact in combination switch turns ON. At
this time if OUTPUT 1 transistor is activated, BCM detects that voltage changes in INPUT 3. H
q When BCM detects that voltage changes in INPUT 3 while OUTPUT 1 transistor is ON, it judges that front
wiper switch is in LOW position. Then BCM sends front wiper request signal (LO) to IPDM E/R using CAN
communication. I
q 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 LOW position.
J

SKIB7833E

Revision: 2005 September WW-9 2006 Murano
FRONT WIPER AND WASHER SYSTEM

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.
Operation Mode
Combination switch reading function has operation modes shown below.
1. Normal status

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