Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti QX56 JA60 2004-2005 Approved 2005_QX56 ww
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K ELECTRICAL
A
SECTION
WIPER, WASHER & HORN
WW B
C
D
E
CONTENTS
PRECAUTION ........................................................... 3 . ATE ..................................................................... 25
. F
Precautions for Supplemental Restraint System ONLY FRONT WIPER HI DOES NOT OPERATE 27 ...
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- ONLY FRONT WIPER INT DOES NOT OPER-
SIONER" ................................................................. 3
. ATE ..................................................................... 28
. G
Wiring Diagrams and Trouble Diagnosis ................. 3 . FRONT WIPER INTERMITTENT OPERATION
FRONT WIPER AND WASHER SYSTEM ................. 4 . SWITCH POSITION CANNOT BE ADJUSTED... 29
Components Parts and Harness Connector Loca- WIPERS DO NOT WIPE WHEN FRONT
H
tion .......................................................................... 4
. WASHER OPERATES ....................................... 29 .
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 ........................ 29 .
AUTO STOP OPERATION ................................... 6 . Removal and Installation of Front Wiper Arms,
FRONT WASHER OPERATION .......................... 6 . Adjustment of Wiper Arms Stop Location .............. 31 . J
MIST OPERATION ............................................... 6 . REMOVAL .......................................................... 31 .
FAIL-SAFE FUNCTION ........................................ 6 . INSTALLATION .................................................. 31 .
COMBINATION SWITCH READING FUNCTION 7 ..... Removal and Installation of Wiper Motor and Link-
WW
CAN Communication System Description ............... 9 . age ......................................................................... 31
.
Schematic ............................................................. 10. REMOVAL .......................................................... 31 .
Wiring Diagram -- WIPER -- ................................11 . INSTALLATION .................................................. 32 .
Terminals and Reference Values for BCM ............ 14 . Washer Nozzle Adjustment ................................... 32 . L
Terminals and Reference Values for IPDM E/R .... 15 . Washer Tube Layout ............................................. 33 .
Work Flow ............................................................. 15. Removal and Installation of Wiper and Washer
Preliminary Inspection ........................................... 15 . Switch .................................................................... 33
. M
INSPECTION FOR POWER SUPPLY AND REMOVAL .......................................................... 33 .
GROUND CIRCUIT ............................................ 15 . INSTALLATION .................................................. 33 .
CONSULT-II Function (BCM) ................................ 17 . Removal and Installation of Washer Tank ............. 33 .
CONSULT-II OPERATION ................................. 17 . REMOVAL .......................................................... 33 .
WORK SUPPORT .............................................. 18 . INSTALLATION .................................................. 34 .
DATA MONITOR ................................................ 18 . Removal and Installation of Washer Motor ............ 34 .
ACTIVE TEST .................................................... 19 . REMOVAL .......................................................... 34 .
CONSULT-II Function (IPDM E/R) ........................ 19 . INSTALLATION .................................................. 34 .
CONSULT-II OPERATION ................................. 19 . REAR WIPER AND WASHER SYSTEM ................. 35 .
DATA MONITOR ................................................ 20 . Components Parts and Harness Connector Loca-
ACTIVE TEST .................................................... 21 . tion ......................................................................... 35
.
Trouble Diagnosis ................................................. 21 . System Description ................................................ 35 .
FRONT WIPER DOES NOT OPERATE ............ 21 . REAR WIPER OPERATION ............................... 36 .
FRONT WIPER STOP POSITION IS INCOR- INTERMITTENT OPERATION ........................... 36 .
RECT ................................................................. 24
. AUTO STOP OPERATION ................................. 37 .
ONLY FRONT WIPER LOW DOES NOT OPER- REAR WASHER OPERATION ........................... 37 .
Revision: October 2005 WW-1 2005 QX56
BCM WIPER SWITCH READING FUNCTION ... 38 INSTALLATION ...................................................53 .
Wiring Diagram -- WIP/R -- ................................. 39 . Rear Washer Nozzle Adjustment ...........................54 .
Terminals and Reference Values for BCM ............. 41 . Rear Washer Tube Layout .....................................54 .
How to Proceed With Trouble Diagnosis ............... 43 . Removal and Installation of Rear Washer Nozzle ...54
Preliminary Inspection ........................................... 43
. REMOVAL ...........................................................54 .
INSPECTION FOR POWER SUPPLY AND INSTALLATION ...................................................54 .
GROUND CIRCUIT ............................................ 43 . Check Valve ...........................................................55
.
CONSULT-II Function (BCM) ................................. 45 . Removal and Installation of Rear Wiper and Washer
CONSULT-II OPERATION .................................. 45 . Switch ....................................................................55
.
DATA MONITOR ................................................. 46
. Removal and Installation of Washer Tank ..............55 .
ACTIVE TEST .................................................... 46
. Removal and Installation of Washer Motor ............55 .
Rear Wiper Does Not Operate .............................. 47 . POWER SOCKET ....................................................56 .
Rear Wiper Stop Position Is Incorrect .................... 49 . Wiring Diagram -- P/SCKT -- ...............................56 .
Only Rear Wiper Does Not Operate ...................... 50 . Removal and Installation of Power Sockets ...........57 .
Only Rear Wiper Intermittent Does Not Operate ... 51 REMOVAL ...........................................................57 .
Wiper Does Not Wipe When Rear Washer Operates 51 ... INSTALLATION ...................................................57 .
Removal and Installation of Rear Wiper Arm, Adjust- HORN .......................................................................58
.
ment of Rear Wiper Arm Stop Location ................. 52 . Wiring Diagram -- HORN -- .................................58 .
REMOVAL .......................................................... 52
. Removal and Installation ........................................59 .
INSTALLATION ................................................... 52
. REMOVAL ...........................................................59 .
Removal and Installation of Rear Wiper Motor ...... 53 . INSTALLATION ...................................................59 .
REMOVAL .......................................................... 53
.
Revision: October 2005 WW-2 2005 QX56
PRECAUTION
PRECAUTION PFP:00011
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS00BDQ
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
G 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
G 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
G 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 EKS00BDR
When you read wiring diagrams, refer to the following:
H
G Refer to GI-15, "How to Read Wiring Diagrams" .
G Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" for power distribution circuit.
When you perform trouble diagnosis, refer to the following: I
G Refer to GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" .
G Refer to GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident" .
J
WW
L
M
Revision: October 2005 WW-3 2005 QX56
FRONT WIPER AND WASHER SYSTEM
FRONT WIPER AND WASHER SYSTEM PFP:28810
Components Parts and Harness Connector Location EKS00BDS
WKIA1920E
System Description EKS00BDT
G Both front wiper relays are located in the IPDM E/R (intelligent power distribution module engine room).
G The wiper switch (combination switch) is composed of a combination of 5 output terminals and 5 input ter-
minals. Terminal combination status is read by the BCM when the wiper switch is turned ON.
G BCM controls front wiper LO, HI, and INT (intermittent) operation.
G IPDM E/R (intelligent power distribution module engine room) operates the wiper motor according to CAN
communication signals from the BCM.
Power is supplied at all times
G through 50A fusible link (letter f , located in the fuse and fusible link box)
G to BCM terminal 70, and
G through 30A fuse (No. 39, located in the IPDM E/R)
G to front wiper relay (located in the IPDM E/R).
With the ignition switch in ON or START position, power is supplied
G through 10A fuse (No. 9, located in the fuse block J/B)
Revision: October 2005 WW-4 2005 QX56
FRONT WIPER AND WASHER SYSTEM
G to combination switch terminal 14, and
G through 10A fuse (No. 59 located in the fuse and relay box) A
G to BCM terminal 38.
Ground is supplied
B
G to BCM terminal 67 and
G to combination switch terminal 12
G through grounds M57, M61 and M79, and C
G to IPDM E/R terminals 38 and 59 and
G to front wiper motor terminal 1
G through grounds E9, E15, and E24. D
LOW SPEED WIPER OPERATION
When the ignition switch is in the ON or START position, and the front wiper switch is turned to the low posi-
tion, the BCM detects a low speed wiper ON request through the combination switch (wiper switch) reading E
function. The BCM then sends a front wiper (low) request signal over CAN communication lines
G from BCM terminals 39 and 40
G to IPDM E/R terminals 39 and 40. F
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
G through front wiper relay G
G to front wiper high relay
G through IPDM E/R terminal 32
H
G to front wiper motor terminal 3.
With power and ground supplied, the front wiper motor operates at low speed.
HI SPEED WIPER OPERATION I
When the ignition switch is in the ON or START position, and the front wiper switch is turned to the high posi-
tion, the BCM detects a high speed wiper ON request through the combination switch (wiper switch) reading
function. The BCM then sends a front wiper (high) request signal over CAN communication lines J
G from BCM terminals 39 and 40
G to IPDM E/R terminals 39 and 40.
When the IPDM E/R receives a front wiper (high) request signal, it supplies ground to energize the front wiper WW
and the front wiper high relays.
With the front wiper and the front wiper high relays energized, power is supplied
G through front wiper relay L
G to front wiper high relay
G through IPDM E/R terminal 35
M
G to front wiper motor terminal 2.
With power and ground supplied, the front wiper motor operates at high speed.
INTERMITTENT OPERATION
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.
When the ignition switch is in the ON or START position, and the front wiper switch is turned to an intermittent
position, the BCM detects a front wiper (intermittent) ON request through the combination switch (wiper
switch) reading function.
The BCM then sends a front wiper (intermittent) request signal over CAN communication lines
G from BCM terminals 39 and 40
G to IPDM E/R terminals 39 and 40.
When the BCM determines that combination switch status is front wiper intermittent ON, it performs the follow-
ing operations.
G BCM detects ON/OFF status of intermittent wiper dial position.
Revision: October 2005 WW-5 2005 QX56
FRONT WIPER AND WASHER SYSTEM
G BCM calculates operation interval from wiper dial position and vehicle speed signal received through CAN
communications.
G BCM sends front wiper request signal (INT) to IPDM E/R at calculated operation interval.
When the IPDM E/R receives a front wiper request signal (INT), it supplies ground to energize the front wiper
relay. It then sends an auto-stop signal to the 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 the windshield base. When the wiper arms
reach the base of windshield, front wiper motor terminals 6 and 1 are connected.
Ground is supplied
G to IPDM E/R terminal 43
G through front wiper motor terminal 6
G through front wiper motor terminal 1
G through grounds E9, E15, and E24.
The IPDM E/R sends an auto stop operation signal to the BCM through CAN communication lines.
When the BCM receives an auto stop operation signal, the BCM sends wiper stop signal to the IPDM E/R over
CAN communication lines. The IPDM E/R then de-energizes the front wiper relay.
The wiper motor will then stop the wiper arms at the STOP position.
FRONT WASHER OPERATION
When the ignition switch is in the ON or START position, and the front and rear washer switches are OFF, the
front and rear washer motor is supplied power
G through 10A fuse (No. 9, located in the fuse block J/B)
G through combination switch (wiper switch) terminal 14
G through combination switch (wiper switch) terminal 13
G to front and rear washer motor terminal 1, and
G through combination switch (wiper switch) terminal 11
G to front and rear washer motor terminal 2.
When the front wiper switch is in the front washer position, the BCM detects a front washer signal request
through the combination switch (wiper switch) reading function.
Combination switch ground is supplied
G to front and rear washer motor terminal 2
G through combination switch (wiper switch) terminal 11
G through combination switch (wiper switch) terminal 12
G through grounds M57, M61 and M79.
With ground supplied, the front and rear washer motor is operated in the front direction.
When the BCM detects that front washer motor has operated for 0.4 seconds or longer, the BCM uses CAN
communication and sends a wiper request signal to the IPDM E/R for low speed operation of wipers.
When the BCM detects that the 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
The BCM includes fail-safe function to prevent malfunction of electrical components controlled by CAN com-
munications if a malfunction in CAN communications occurs.
The BCM uses CAN communications to stop output of electrical components it controls.
Until the ignition switch is turned off, the front wiper system remains in same status as just before fail-safe con-
trol was initiated. (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, the BCM remains in standby until normal signals are received.
When normal signals are received, fail-safe status is canceled.
Revision: October 2005 WW-6 2005 QX56
FRONT WIPER AND WASHER SYSTEM
COMBINATION SWITCH READING FUNCTION
Description A
G BCM reads combination switch status, and controls related systems such as headlamps and wipers,
according to the results.
G BCM reads information for a maximum of 20 switches by combining five output terminals (OUTPUT 1-5) B
and five input terminals (INPUT 1-5).
Operation Description
C
G BCM activates transistors of output terminals (OUTPUT 1-5) periodically, and allows current to flow in
turn.
G If any (1 or more) switches are turned ON, the circuit of output terminals (OUTPUT 1-5) and input termi-
D
nals (INPUT 1-5) becomes active.
G At this time, transistors of output terminals (OUTPUT 1-5) are activated to allow current to flow. When volt-
age of the input terminal (INPUT 1-5) corresponding to that switch changes, the interface in the BCM
detects a voltage change, and the BCM determines that the switch is ON. E
F
G
H
I
J
WW
L
M
SKIA4958E
Revision: October 2005 WW-7 2005 QX56
FRONT WIPER AND WASHER SYSTEM
BCM - Operation Table of Combination Switches
G BCM reads operation status of the combination switch using combinations shown in the table below.
SKIA4959E
Sample Operation: (When Wiper Switch is Turned ON)
G When the wiper switch is turned ON, contact in the combination switch turns ON. At this time if OUTPUT 1
transistor is activated, the BCM detects that voltage changes in INPUT 3.
G When the OUTPUT 1 transistor is ON, the BCM detects that voltage changes in INPUT 3, and judges that
front wiper low is ON. Then the BCM sends a front wiper request signal (LO) to the IPDM E/R using CAN
communication.
G When OUTPUT 1 transistor is activated again, BCM detects that voltage changes in INPUT 3, and recog-
nizes that the wiper switch is continuously ON.
SKIA5290E
Revision: October 2005 WW-8 2005 QX56
FRONT WIPER AND WASHER SYSTEM
NOTE:
Each OUTPUT terminal transistor is activated at 10 ms intervals. Therefore, after the switch is turned ON, A
electrical loads are activated with time delay. This time delay is so short that it cannot be detected by human
senses.
Operation Mode B
The combination switch reading function has the operation modes shown below.
1. Normal status
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