The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
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
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:

●

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.

●

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.

●

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.

Wiring Diagrams and Trouble Diagnosis

AKS004MR

When You Read Wiring Diagrams, Refer to the Following:

●

Refer to

GI-14, "How to Read Wiring Diagrams"

●

Refer to

PG-3, "POWER SUPPLY ROUTING CIRCUIT"

for power distribution circuit.

When You Perform Trouble Diagnosis, Refer to the Following:

●

Refer to

GI-10, "How to Follow Trouble Diagnoses"

●

Refer to

GI-26, "How to Perform Efficient Diagnosis for an Electrical Incident"

WW-4

FRONT WIPER AND WASHER SYSTEM

Revision; 2004 April

2003 Murano

FRONT WIPER AND WASHER SYSTEM

PFP:28810

Components Parts and Harness Connector Location

AKS004MS

System Description

AKS004MT

●

All front wiper relays (HI, LO) are included in IPDM E/R.

●

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.

●

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

●

IPDM E/R (intelligent power distribution module engine room) operates wiper motor according to CAN
communication signals from BCM (body control module).

Power is supplied at all times

●

through 50 A fusible link (letter F, located in fusible link block)

●

to BCM (body control module) terminal 7

●

through 30 A fuse [No. 74, located in IPDM E/R (intelligent power distribution module engine room)]

●

to front wiper relay [built in IPDM E/R (intelligent power distribution module engine room)]

●

through 15 A fuse [No. 73, located in IPDM E/R (intelligent power distribution module engine room)]

●

to CPU (central processing unit) [located in IPDM E/R (intelligent power distribution module engine
room)].

When the ignition switch ON or START position, power is supplied

●

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

●

to BCM (body control module) terminal 35

●

through 10 A fuse [No. 80, located in IPDM E/R (intelligent power distribution module engine room)]

●

to front wiper relay [built in IPDM E/R (intelligent power distribution module engine room)] and

●

to front wiper high relay [built in IPDM E/R (intelligent power distribution module engine room)]

●

to CPU (central processing unit) [located in IPDM E/R (intelligent power distribution module engine room)]

●

through 10 A fuse [No. 87, located in IPDM E/R (intelligent power distribution module engine room)]

SKIA4579E

FRONT WIPER AND WASHER SYSTEM

WW-5

Revision; 2004 April

2003 Murano

●

through IPDM E/R (intelligent power distribution module engine room) terminal 18

●

to combination switch terminal 14.

Ground is supplied

●

to BCM (body control module) terminal 8

●

through grounds E13, E26 and E28

●

to IPDM E/R (intelligent power distribution module engine room) terminals 14 and 45

●

through grounds E13, E26 and E28

●

to combination switch (wiper switch) terminal 12

●

through grounds M14 and M78.

LOW SPEED WIPER OPERATION

When front wiper switch is in LO position, BCM detects the LO position of the wiper switch by BCM wiper
switch reading function.
BCM sent front wiper request signal (LO) to IPDM E/R by CAN communication line

●

from BCM terminals 70 and 71

●

to IPDM E/R terminals 48 and 49.

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

●

to front wiper motor terminal 3

●

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

Ground is supplied

●

to front wiper motor terminal 1

●

through grounds E13, E26 and E28.

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

HI SPEED WIPER OPERATION

When front wiper switch is in HI position, BCM detects the HI position of the wiper switch by BCM wiper switch
reading function.
BCM sent front wiper request signal (HI) to IPDM E/R by CAN communication line

●

from BCM terminals 70 and 71

●

to IPDM E/R terminals 48 and 49.

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

●

to front wiper motor terminal 2

●

through IPDM E/R terminal 30 and front wiper high relay and front wiper relay.

Ground is supplied

●

to front wiper motor terminal 1

●

through grounds E13, E26 and E28.

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

INTERMITTENT OPERATION

The front wiper motor operates the wiper arms one time at low speed at a set interval of wiper volume switch
and vehicle speeds, this feature is controlled by the BCM and IPDM E/R.
When front wiper switch is in INT position BCM detects INT position of the wiper switch by BCM wiper switch
reading function. BCM performs the following operations

●

When BCM detects ON/OFF status of intermittent operation dial positions 1, 2, and 3 it determines wiper
dial position status. Refer to

WW-9, "Wiper Dial Position Setting"

●

BCM calculates operation interval from wiper dial position and vehicle speed signal received from unified
meter and A/C amp with CAN communications.

●

BCM sends front wiper request signal (INT) to IPDM E/R at calculated operation interval.

●

When IPDM E/R receives front wiper request signal (INT), it turns ON internal front wiper relay. It then
sends auto stop signal to BCM, and conducts intermittent front wiper motor operation.

With power is supplied and ground circuit is routed, front wiper operates at intermittent.

WW-6

FRONT WIPER AND WASHER SYSTEM

Revision; 2004 April

2003 Murano

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

●

from IPDM E/R terminal 31

●

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

●

to IPDM E/R terminal 38

●

through front wiper motor terminal 4

●

through front wiper motor terminal 1

●

through grounds E13, E26 and E28.

Then the IPDM E/R sends auto stop operation signal to BCM with CAN communication line.
When BCM receives auto stop operation signal, BCM sends wiper stop signal to IPDM E/R with CAN commu-
nication line.
IPDM E/R stops wiper motor. Wiper motor will then stop wiper arms at the STOP position.

WASHER OPERATION

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

WW-7, "BCM WIPER SWITCH READING FUNCTION"

), combination switch

(wiper switch) ground is supplied

●

through combination switch (wiper switch) terminal 13

●

to front and rear washer motor terminal 1

●

to front and rear washer motor terminal 2

●

through combination switch (wiper switch) terminal 11

●

to combination switch terminal 12

●

through grounds M14 and M78.

With ground is supplied, front and rear washer motor is operated.
When BCM detects that front and rear washer motor has operated for 0.4 seconds or linger, BCM operates
front wiper motor for low speed.
When 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.
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.

FAIL-SAFE FUNCTION

IPDM E/R includes a fail-safe function to prevent malfunction of electrical components controlled by CAN com-
munications in CAN communications occurs.
When fail-safe status is initiated, IPDM E/R remains in steady unit signals are received.
IPDM E/R maintains the condition of which before fail-safe starts until ignition switch is turned on.
After ignition switch is turned off and turned on again, if wipers stop at the different position, fail-safe returns
the wipers automatically to the proper position and then stops.

FRONT WIPER AND WASHER SYSTEM

WW-7

Revision; 2004 April

2003 Murano

BCM WIPER SWITCH READING FUNCTION

BCM reads combination switch (wiper switch) status, and controls front wipers based on the results.
BCM is a combination of 5 output terminals (OUTPUT 1 - 5) and 5 input terminals (INPUT 1 - 5). It reads 20
types of switch data and 5 types of diagnosis data.

Operation Description

BCM continuously outputs power voltage from input terminals (INPUT 1 - 5). At this time, output terminals
(OUTPUT 1 - 5) operate transistors in sequence and carry current. If any switch (or switches) becomes ON at
this time, the input terminal corresponding to that switch detects current flowing, and BCM determines that the
switch is ON.

Table of BCM - COMBINATION SWITCH OPERATIONS

BCM reads operation status of combination switch using combinations shown in table below.

SKIA6458E

SKIA6459E

WW-8

FRONT WIPER AND WASHER SYSTEM

Revision; 2004 April

2003 Murano

Sample Operation: (WIPER SWITCH TURNED TO LO POSITION)

●

When wiper switch is turned to LO position, front wiper LO contact inside combination switch becomes
ON. At this time, OUTPUT 3 transistor operates and BCM detects flow of current at INPUT 1.

●

When OUTPUT 3 transistor is ON and BCM detects current flowing at INPUT 1, BCM determines that
wiper switch is at LO. BCM uses CAN communication and sends front wiper signals to IPDM E/R.

●

When OUTPUT 3 transistor operates again and BCM again detects current flowing at INPUT 1, it confirms
that front wiper LO operation is continuing.

NOTE:
Each OUTPUT terminal transistor operates at 10 ms intervals. Therefore, a delay occurs between the
switch becoming ON and operation of the electric load. However, this delay is so small it is undetectable.

Operating Modes

The following operation modes exist for combination switch reading function.

Normal Status

When BCM is not in sleep status, OUTPUT terminals (1 - 5) each turn ON-OFF every 10 ms.

Sleep Status

When BCM is in sleep status, output from OUTPUT 1 and 2 transistors stops, with BCM entering a power-sav-
ing mode. OUTPUT (3 - 5) turns ON-OFF every 60 ms, and only input from lighting switch system is accepted.

SKIA4469E

SKIA3097E

FRONT WIPER AND WASHER SYSTEM

WW-9

Revision; 2004 April

2003 Murano

Intermittent Operation

Wiper intermittent operation delay interval is determined from a combination of 3 switches (intermittent opera-
tion dial position 1, intermittent operation dial position 2, and intermittent operation dial position 3) and vehicle
speed signal.
During each intermittent operation delay interval, BCM sends front wiper request signal to IPDM E/R.

Wiper Dial Position Setting

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.

●

Intermittent operation dial position 1: ON (input 3 and output 1 are conducting)

●

Intermittent operation dial position 2: ON (input 5 and output 1 are conducting)

●

Intermittent operation dial position 3: ON (input 4 and output 2 are conducting)

BCM determines front wiper intermittent operation delay interval from wiper dial position 1 and vehicle speed,
and sends wiper request signal (INT) to IPDM E/R.

CAN Communication System Description

AKS005MC

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex 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 For 2WD Models

AKS007R1

Wiper dial position

Intermittent operation

interval

Combination switch

Intermittent operation

dial position 1

Intermittent operation

dial position 2

Intermittent operation

dial position 3

Wiper dial position 1

Small

↓

Large

Wiper dial position 2

OFF

Wiper dial position 3

OFF

Wiper dial position 4

OFF

Wiper dial position 5

OFF

Wiper dial position 6

OFF

Wiper dial position 7

OFF

Body type

Wagon

Axle

2WD

Engine

VQ35DE

Transmission

CVT

Brake control

ABS

VDC

Low tire pressure warning
system

Navigation system

Automatic drive positioner

CAN communication unit

ECM

TCM

Low tire pressure warning
control unit

Display unit

WW-10

FRONT WIPER AND WASHER SYSTEM

Revision; 2004 April

2003 Murano

: Applicable

TYPE 1/TYPE 2/TYPE 3/TYPE 4/TYPE 5/TYPE 6/TYPE 7/TYPE 8
System Diagram

●

Type1

Display control unit

Data link connector

BCM

Unified meter and A/C amp.

Steering angle sensor

Driver seat control unit

ABS actuator and electric
unit (control unit)

IPDM E/R

CAN communication type

WW-10, "TYPE 1/TYPE 2/TYPE 3/TYPE 4/TYPE

5/TYPE 6/TYPE 7/TYPE 8"

WW-16, "TYPE 9/TYPE10/TYPE 11/TYPE 12/

TYPE 13/TYPE 14/TYPE 15/TYPE 16"

Body type

Wagon

Axle

2WD

Engine

VQ35DE

Transmission

CVT

Brake control

ABS

VDC

Low tire pressure warning
system

Navigation system

Automatic drive positioner

CAN communication unit

SKIA4902E

FRONT WIPER AND WASHER SYSTEM

WW-11

Revision; 2004 April

2003 Murano

●

Type2

●

Type3

●

Type4

SKIA4903E

SKIA4904E

SKIA4905E

WW-12

FRONT WIPER AND WASHER SYSTEM

Revision; 2004 April

2003 Murano

●

Type5

●

Type6

●

Type7

SKIA4906E

SKIA4907E

SKIA4908E

FRONT WIPER AND WASHER SYSTEM

WW-13

Revision; 2004 April

2003 Murano

●

Type8

SKIA4909E

WW-14

FRONT WIPER AND WASHER SYSTEM

Revision; 2004 April

2003 Murano

Input/output Signal Chart

T: Transmit R: Receive

Signals

ECM

TCM

Low

tire

pres-

sure

warn-

ing

control

unit

Dis-
play

unit

Dis-
play

control

unit

BCM

Uni-

fied

meter

and A/

C amp.

Driver

seat

control

unit

ABS

actua-

tor and

elec-

tric unit

(con-

trol

unit)

IPDM

E/R

Engine speed signal

Engine status signal

Engine coolant temperature signal

CVT position indicator signal

Second position signal

Second position indicator signal

Engine and CVT integrated control
signal

Accelerator pedal position signal

Closed throttle position signal

Wide open throttle position signal

Key switch signal

Ignition switch signal

P range signal

Stop lamp switch signal

Fuel consumption monitor signal

CVT self-diagnosis signal

ABS operation signal

Air conditioner switch signal

A/C compressor request signal

A/C compressor feedback signal

Blower fan motor switch signal

A/C control signal

Cooling fan speed request signal

Position lights request signal

Low beam request signal

Low beam status signal

High beam request signal

High beam status signal

Front fog lights request signal

Vehicle speed signal

Sleep request 1 signal

Sleep request 2 signal

Door switch signal

Turn indicator signal

FRONT WIPER AND WASHER SYSTEM

WW-15

Revision; 2004 April

2003 Murano

Key fob ID signal

Key fob door unlock signal

Seat belt buckle switch signal

Oil pressure switch signal

Buzzer output signal

Fuel level sensor signal

Fuel level low warning signal

Malfunction indicator lamp signal

ASCD SET lamp signal

ASCD CRUISE lamp signal

Input shaft revolution signal

Output shaft revolution signal

Front wiper request signal

Front wiper stop position signal

Rear window defogger switch signal

Rear window defogger control signal

Hood switch signal

Theft warning horn request signal

Horn chirp signal

Tire pressure signal

Tire pressure data signal

ABS warning lamp signal

Brake warning lamp signal

System setting signal

Parking brake switch signal

Signals

ECM

TCM

Low

tire

pres-

sure

warn-

ing

control

unit

Dis-
play

unit

Dis-
play

control

unit

BCM

Uni-

fied

meter

and A/

C amp.

Driver

seat

control

unit

ABS

actua-

tor and

elec-

tric unit

(con-

trol

unit)

IPDM

E/R

Content .. 281 282 283 284 ..