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K ELECTRICAL
A
B
SECTION
WIPER, WASHER & HORN C
D
E
CONTENTS
PRECAUTION ........................................................... 3 . ATE ..................................................................... 25
. F
Precautions for Supplemental Restraint System ONLY FRONT WIPER HI DOES NOT OPERATE 25 ...
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- ONLY FRONT WIPER INT DOES NOT OPER-
SIONER" ................................................................. 3
. ATE ..................................................................... 26
. G
Wiring Diagrams and Trouble Diagnosis ................. 3 . FRONT WIPER INTERMITTENT OPERATION
FRONT WIPER AND WASHER SYSTEM ................. 4 . SWITCH POSITION CANNOT BE ADJUSTED... 27
Components Parts and Harness Connector Loca- WIPERS DO NOT WIPE WHEN FRONT
H
tion .......................................................................... 4
. WASHER OPERATES ....................................... 27 .
System Description ................................................. 4 . FRONT WIPERS OPERATE FOR 10 SECONDS,
LOW SPEED WIPER OPERATION ..................... 5 . STOP FOR 20 SECONDS, AND AFTER
HI SPEED WIPER OPERATION .......................... 5 . REPEATING THIS OPERATION FIVE TIMES, I
INTERMITTENT OPERATION ............................. 5 . THEY BECOME INOPERATIVE ........................ 27 .
AUTO STOP OPERATION ................................... 5 . Removal and Installation for Front Wiper Arms,
WASHER OPERATION ........................................ 6 . Adjustment for Wiper Arms Stop Location ............. 29 . J
MIST OPERATION ............................................... 6 . Removal and Installation for Wiper Motor and Link-
FAIL-SAFE FUNCTION ........................................ 6 . age ......................................................................... 29
.
COMBINATION SWITCH READING FUNCTION 6 ..... REMOVAL .......................................................... 29 . WW
CAN Communication System Description ............... 9 . INSTALLATION .................................................. 30 .
Wiring Diagram -- WIPER -- ............................... 10 . Washer Nozzle Adjustment ................................... 30 .
Terminals and Reference Value for BCM .............. 12 . Washer Tube Layout ............................................. 31 .
Terminals and Reference Values for IPDM E/R .... 13 . Removal and Installation for Wiper and Washer L
Work Flow ............................................................. 13. Switch .................................................................... 31
.
Preliminary Inspection ........................................... 14 . REMOVAL .......................................................... 31 .
INSPECTION FOR POWER SUPPLY AND INSTALLATION .................................................. 31 . M
GROUND CIRCUIT ............................................ 14 . Removal and Installation for Washer Tank ............ 31 .
CONSULT-II Functions (BCM) .............................. 15 . Removal and Installation for Washer Motor ........... 31 .
CONSULT-II OPERATION ................................. 15 . CIGARETTE LIGHTER ............................................ 33 .
DATA MONITOR ................................................ 16 . Wiring Diagram -- CIGAR -- ................................ 33 .
ACTIVE TEST .................................................... 17 . Removal and Installation ....................................... 34 .
CONSULT-II Functions (IPDM E/R) ...................... 18 . REMOVAL .......................................................... 34 .
CONSULT-II OPERATION ................................. 18 . INSTALLATION .................................................. 34 .
DATA MONITOR ................................................ 19 . POWER SOCKET .................................................... 35 .
ACTIVE TEST .................................................... 20 . Wiring Diagram -- P/SCKT -- ............................... 35 .
Trouble Diagnosis ................................................. 20 . Removal and Installation ....................................... 36 .
FRONT WIPER DOES NOT OPERATE ............ 20 . FRONT POWER SOCKET ................................. 36 .
FRONT WIPER STOP POSITION IS INCOR- REAR POWER SOCKET ................................... 36 .
RECT ................................................................. 23
. HORN ....................................................................... 37
.
ONLY FRONT WIPER LOW DOES NOT OPER-
WW-1
Wiring Diagram -- HORN -- ................................. 37
.
Removal and Installation ....................................... 38
.
REMOVAL (HORN HIGH) .................................. 38 .
INSTALLATION (HORN HIGH) ........................... 38 .
REMOVAL (HORN LOW) ................................... 38 .
INSTALLATION (HORN LOW) ........................... 38 .
WW-2
PRECAUTION
PRECAUTION PFP:00011
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS004T3
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
Wiring Diagrams and Trouble Diagnosis EKS003UB
When you read wiring diagrams, refer to the following:
H
q Refer to GI-12, "How to Read Wiring Diagrams" .
q Refer to PG-3, "POWER SUPPLY ROUTING CIRCUIT" for power distribution circuit.
When you perform trouble diagnosis, refer to the following: I
q Refer to GI-10, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" .
q Refer to GI-25, "How to Perform Efficient Diagnosis for an Electrical Incident" .
J
WW
L
M
WW-3
FRONT WIPER AND WASHER SYSTEM
FRONT WIPER AND WASHER SYSTEM PFP:28810
Components Parts and Harness Connector Location EKS003UC
WKIA1546E
System Description EKS003UD
q Both front wiper relays are located in IPDM E/R.
q 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 when switch is turned ON.
q BCM controls front wiper LO, HI, and INT (intermittent) operation.
q IPDM E/R (intelligent power distribution module engine room) operates wiper motor according to CAN
communication signals from the BCM.
Power is supplied at all times
q through 50A fusible link (letter f , located in the fuse and fusible link box)
q to BCM terminal 55, and
q through 20A fuse (No. 39, located in the IPDM E/R)
q to front wiper relay (located in the IPDM E/R).
With the ignition switch in ON or START position, power is supplied at all times
q through 10A fuse (No. 1, located in the fuse block J/B)
q to BCM terminal 38, and
q through 10A fuse (No. 47, located in the IPDM E/R)
q through IPDM E/R terminal 44
q to front washer motor terminal +.
Ground is supplied at all times
q to BCM terminals 49 and 52, and
q to combination switch terminal 12
q from body grounds M57, M61, and M79;
q to IPDM E/R terminals 38 and 60, and
WW-4
FRONT WIPER AND WASHER SYSTEM
q to front wiper motor terminal E
q from body grounds E15 and E24. A
LOW SPEED WIPER OPERATION
When the ignition switch is in the ON or START position, and the front wiper switch is turned to low position, B
the BCM detects a low speed wiper ON signal by BCM wiper switch reading function.
BCM then sends front wiper (low) request signal over CAN communication lines
q from BCM terminals 39 and 40
C
q to IPDM E/R terminals 48 and 49.
When IPDM E/R receives front wiper (low) request signal, it supplies ground to energize the front wiper relay.
With the front wiper relay energized, power is supplied
D
q from front wiper relay
q to front wiper HI relay
q through IPDM E/R terminal 21 E
q to front wiper motor terminal L.
With power and ground supplied, the front wiper motor operates at low speed.
HI SPEED WIPER OPERATION F
When the ignition switch is in the ON or START position, and the front wiper switch is turned to high position,
the BCM detects a high speed wiper ON signal by BCM wiper switch reading function.
BCM then sends front wiper (high) request signal over CAN communication lines G
q from BCM terminals 39 and 40
q to IPDM E/R terminals 48 and 49.
H
When IPDM E/R receives front wiper (high) request signal, it supplies ground to energize the front wiper and
the front wiper HI relays.
With the front wiper and the front wiper HI relays energized, power is supplied
q from front wiper relay I
q to front wiper HI relay
q through IPDM E/R terminal 31
J
q to front wiper motor terminal H.
With power and ground supplied, the front wiper motor operates at high speed.
INTERMITTENT OPERATION WW
Wiper intermittent operation delay interval is determined from the combination of the intermittent wiper dial
position inputs and vehicle speed. During each intermittent operation delay interval, the BCM sends a front
wiper request signal to the IPDM E/R to operate the wipers. L
When the ignition switch is in ON or START position, and the front wiper switch is turned to intermittent posi-
tion, the BCM detects a front wiper (intermittent) ON signal by BCM wiper switch reading function.
BCM then sends front wiper (intermittent) request signal over CAN communication lines
M
q from BCM terminals 39 and 40
q to IPDM E/R terminals 48 and 49.
When BCM determines that combination switch status is front wiper intermittent ON, it performs the following
operations.
q BCM detects ON/OFF status of intermittent wiper dial position
q BCM calculates operation interval from wiper dial position and vehicle speed signal received from unified
meter and A/C amp. through CAN communications.
q 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 supplies ground to energize the front wiper relay.
It then sends auto-stop signal to BCM, and conducts intermittent front wiper motor operation.
AUTO STOP OPERATION
When the wiper arms are not located at the base of the windshield, and the wiper switch is turned OFF, the
wiper motor will continue to operate until the wiper arms reach windshield base. When wiper arms reach base
of windshield, front wiper motor terminals P and E are connected.
Ground is supplied
WW-5
FRONT WIPER AND WASHER SYSTEM
q to terminal 32 of the IPDM E/R
q through front wiper motor terminal P
q through terminal E of the front wiper motor
q from body grounds E15 and E24.
The IPDM E/R sends auto stop operation signal to BCM through CAN communication lines.
When BCM receives auto stop operation signal, BCM sends wiper stop signal to IPDM E/R with CAN commu-
nication lines. The IPDM E/R then de-energizes the front wiper relay.
Wiper motor will then stop wiper arms at the STOP position.
WASHER OPERATION
When the ignition switch is in ON or START position, power is supplied
q through 10A fuse (No. 47, located in the IPDM E/R)
q through IPDM E/R terminal 44
q to front washer motor terminal +.
When front wiper switch is placed in washer position,
Ground is supplied
q to front washer motor terminal -
q through combination switch terminal 11
q through combination switch terminal 12
q from body grounds M57, M61, and M79.
With power and ground supplied, the front washer motor is operated. At the same time,
Power is supplied
q through combination switch terminal 2
q to BCM (output 2) terminal 35.
When BCM detects that front washer motor has operated for 0.4 seconds or longer, BCM uses CAN commu-
nication and sends wiper request signal to IPDM E/R for low speed operation of wipers.
When BCM detects that washer switch is OFF, low speed operation cycles approximately 3 times and then
stops.
MIST OPERATION
When the wiper switch is temporarily placed in 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
BCM includes fail-safe function to prevent malfunction of electrical components controlled by CAN communi-
cations if a malfunction in CAN communications occurs.
BCM uses CAN communications to stop output of electrical components it controls.
Until ignition switch is turned off, front wiper remains in same status as just before fail-safe control was initi-
ated. (If wiper was in low speed operation just before fail-safe, it continues low speed operation until ignition
switch is turned OFF.)
When fail-safe status is initiated, BCM remains in standby until normal signals are received.
When normal signals are received, fail-safe status is canceled.
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 allows current to flow in
turn.
WW-6
FRONT WIPER AND WASHER SYSTEM
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. A
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. B
C
D
E
F
G
H
I
J
SKIA4958E
BCM - Operation Table of Combination Switches
q BCM reads operation status of combination switch using combinations shown in table below. WW
L
M
SKIA4959E
Sample Operation: (When Wiper Switch is Turned ON)
q When wiper switch is turned ON, contact in combination switch turns ON. At this time if OUTPUT 1 tran-
sistor is activated, BCM detects that voltage changes in INPUT 3.
WW-7
FRONT WIPER AND WASHER SYSTEM
q When OUTPUT 1 transistor is ON, BCM detects that voltage changes in INPUT 3, and judges that front
wiper low is ON. Then BCM sends front wiper request signal (LO) to IPDM E/R using CAN communica-
tion.
q When OUTPUT 1 transistor is activated again, BCM detects that voltage changes in INPUT 3, and recog-
nizes that wiper switch is continuously ON.
SKIA5290E
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. 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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