Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti QX56 JA60 2004-2005 Approved 2004_QX56 ww
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K ELECTRICAL
A
SECTION
WIPER, WASHER & HORN
WW B
C
D
E
CONTENTS
PRECAUTION ........................................................... 3 . ONLY FRONT WIPER HI DOES NOT OPERATE 25 ... F
Precautions for Supplemental Restraint System ONLY FRONT WIPER INT DOES NOT OPER-
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- ATE ..................................................................... 26
.
SIONER" ................................................................. 3
. FRONT WIPER INTERMITTENT OPERATION G
Wiring Diagrams and Trouble Diagnosis ................. 3 . SWITCH POSITION CANNOT BE ADJUSTED... 27
FRONT WIPER AND WASHER SYSTEM ................. 4 . WIPERS DO NOT WIPE WHEN FRONT
Components Parts and Harness Connector Loca- WASHER OPERATES ....................................... 27 .
H
tion .......................................................................... 4
. FRONT WIPERS OPERATE FOR 10 SECONDS,
System Description ................................................. 4 . STOP FOR 20 SECONDS, AND AFTER
LOW SPEED WIPER OPERATION ..................... 5 . REPEATING THIS OPERATION FIVE TIMES,
HI SPEED WIPER OPERATION .......................... 5 . THEY BECOME INOPERATIVE ........................ 27 . I
INTERMITTENT OPERATION ............................. 5 . Removal and Installation of Front Wiper Arms,
AUTO STOP OPERATION ................................... 6 . Adjustment of Wiper Arms Stop Location .............. 29 .
FRONT WASHER OPERATION .......................... 6 . REMOVAL .......................................................... 29 . J
MIST OPERATION ............................................... 6 . INSTALLATION .................................................. 29 .
FAIL-SAFE FUNCTION ........................................ 6 . Removal and Installation of Wiper Motor and Link-
COMBINATION SWITCH READING FUNCTION 7 ..... age ......................................................................... 29
.
WW
CAN Communication System Description ............... 7 . REMOVAL .......................................................... 29 .
Schematic ............................................................... 8
. INSTALLATION .................................................. 30 .
Wiring Diagram -- WIPER -- ................................. 9 . Washer Nozzle Adjustment ................................... 30 .
Terminals and Reference Values for BCM ............ 12 . Washer Tube Layout ............................................. 31 . L
Terminals and Reference Values for IPDM E/R .... 13 . Removal and Installation of Wiper and Washer
Work Flow ............................................................. 13. Switch .................................................................... 31
.
Preliminary Inspection ........................................... 13 . REMOVAL .......................................................... 31 . M
INSPECTION FOR POWER SUPPLY AND INSTALLATION .................................................. 31 .
GROUND CIRCUIT ............................................ 13 . Removal and Installation of Washer Tank ............. 31 .
CONSULT-II Function (BCM) ................................ 15 . REMOVAL .......................................................... 31 .
CONSULT-II OPERATION ................................. 15 . INSTALLATION .................................................. 32 .
DATA MONITOR ................................................ 16 . Removal and Installation of Washer Motor ............ 32 .
ACTIVE TEST .................................................... 17 . REAR WIPER AND WASHER SYSTEM ................. 33 .
CONSULT-II Function (IPDM E/R) ........................ 17 . Components Parts and Harness Connector Loca-
CONSULT-II OPERATION ................................. 17 . tion ......................................................................... 33
.
DATA MONITOR ................................................ 18 . System Description ................................................ 33 .
ACTIVE TEST .................................................... 19 . REAR WIPER OPERATION ............................... 33 .
Trouble Diagnosis ................................................. 19 . INTERMITTENT OPERATION ........................... 34 .
FRONT WIPER DOES NOT OPERATE ............ 19 . AUTO STOP OPERATION ................................. 35 .
FRONT WIPER STOP POSITION IS INCOR- REAR WASHER OPERATION ........................... 35 .
RECT ................................................................. 22
. BCM WIPER SWITCH READING FUNCTION ... 36
ONLY FRONT WIPER LOW DOES NOT OPER- Wiring Diagram -- WIP/R -- ................................. 37 .
ATE .................................................................... 23
. Terminals and Reference Values for BCM ............. 39 .
Revision: August 2007 WW-1 2004 QX56
How to Proceed With Trouble Diagnosis ............... 41 . Rear Washer Nozzle Adjustment ...........................52 .
Preliminary Inspection ........................................... 41
. Rear Washer Tube Layout .....................................52 .
INSPECTION FOR POWER SUPPLY AND Removal and Installation of Rear Washer Nozzle ...52
GROUND CIRCUIT ............................................ 41 . REMOVAL ...........................................................52 .
CONSULT-II Function (BCM) ................................. 43 . INSTALLATION ...................................................52 .
CONSULT-II OPERATION .................................. 43 . Check Valve ...........................................................53
.
DATA MONITOR ................................................. 44
. Removal and Installation of Rear Wiper and Washer
ACTIVE TEST .................................................... 44
. Switch ....................................................................53
.
Rear Wiper Does Not Operate .............................. 45 . Removal and Installation of Washer Tank ..............53 .
Rear Wiper Stop Position Is Incorrect .................... 47 . Removal and Installation of Washer Motor ............53 .
Only Rear Wiper Does Not Operate ...................... 48 . POWER SOCKET ....................................................54 .
Only Rear Wiper Intermittent Does Not Operate ... 49 Wiring Diagram -- P/SCKT -- ...............................54 .
Wiper Does Not Wipe When Rear Washer Operates 49 ... Removal and Installation of Power Sockets ...........55 .
Removal and Installation of Rear Wiper Arm, Adjust- REMOVAL ...........................................................55 .
ment of Rear Wiper Arm Stop Location ................. 50 . INSTALLATION ...................................................55 .
REMOVAL .......................................................... 50
. HORN .......................................................................56
.
INSTALLATION ................................................... 50
. Wiring Diagram -- HORN -- .................................56 .
Removal and Installation of Rear Wiper Motor ...... 51 . Removal and Installation ........................................57 .
REMOVAL .......................................................... 51
. REMOVAL ...........................................................57 .
INSTALLATION ................................................... 51
. INSTALLATION ...................................................57 .
Revision: August 2007 WW-2 2004 QX56
PRECAUTION
PRECAUTION PFP:00011
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS007F3
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 EKS007F4
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: August 2007 WW-3 2004 QX56
FRONT WIPER AND WASHER SYSTEM
FRONT WIPER AND WASHER SYSTEM PFP:28810
Components Parts and Harness Connector Location EKS007F5
WKIA3400E
System Description EKS007F6
G Both front wiper relays are located in 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 (body control module) when the wiper switch is
turned ON.
G BCM controls front wiper LO, HI, and INT (intermittent) operation.
G IPDM E/R operates the wiper motor according to CAN communication signals from the BCM.
Power is supplied at all times
G to ignition relay, located in the IPDM E/R, and
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
Revision: August 2007 WW-4 2004 QX56
FRONT WIPER AND WASHER SYSTEM
G to ignition relay, located in the IPDM E/R, and
G through 10A fuse (No. 9, located in the fuse block J/B) A
G to combination switch terminal 14, and
G through 10A fuse (No. 59, located in the fuse and relay box)
B
G to BCM terminal 38.
Ground is supplied
G to BCM terminal 67 and C
G to combination switch terminal 12
G through grounds M57, M61 and M79, and
G to IPDM E/R terminals 38 and 59 and D
G to front wiper motor terminal 1
G through grounds E9, E15 and E24.
E
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
function. The BCM then sends a front wiper (low) request signal over CAN communication lines F
G from BCM terminals 39 and 40
G to IPDM E/R terminals 39 and 40.
G
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
H
G to front wiper high relay
G through IPDM E/R terminal 32
G to front wiper motor terminal 3. I
With power and ground supplied, the front wiper motor operates at low speed.
HI SPEED WIPER OPERATION
J
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
G from BCM terminals 39 and 40 WW
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
and the front wiper high relays. L
With the front wiper and the front wiper high relays energized, power is supplied
G through front wiper relay
M
G to front wiper high relay
G through IPDM E/R terminal 35
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.
Revision: August 2007 WW-5 2004 QX56
FRONT WIPER AND WASHER SYSTEM
G BCM detects ON/OFF status of intermittent wiper dial position
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.
Revision: August 2007 WW-6 2004 QX56
FRONT WIPER AND WASHER SYSTEM
When normal signals are received, fail-safe status is canceled.
A
COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "COMBINATION SWITCH READING FUNCTION" .
CAN Communication System Description EKS007F7 B
Refer to LAN-5, "CAN COMMUNICATION" .
C
D
E
F
G
H
I
J
WW
L
M
Revision: August 2007 WW-7 2004 QX56
FRONT WIPER AND WASHER SYSTEM
Schematic EKS007F8
WKWA2262E
Revision: August 2007 WW-8 2004 QX56
FRONT WIPER AND WASHER SYSTEM
Wiring Diagram -- WIPER -- EKS007F9
A
B
C
D
E
F
G
H
I
J
WW
L
M
WKWA3099E
Revision: August 2007 WW-9 2004 QX56
FRONT WIPER AND WASHER SYSTEM
WKWA1388E
Revision: August 2007 WW-10 2004 QX56
FRONT WIPER AND WASHER SYSTEM
A
B
C
D
E
F
G
H
I
J
WW
L
M
WKWA3100E
Revision: August 2007 WW-11 2004 QX56
FRONT WIPER AND WASHER SYSTEM
Terminals and Reference Values for BCM EKS007FA
Measuring condition
Terminal Wire Igni- Reference Value (V)
Signal name
No. color tion Operation or condition (Approx.)
switch
G Light switch and wiper switch OFF
2 SB Combination switch input 5 ON
G Wiper dial position 4
SKIA5291E
G Light switch and wiper switch OFF
3 G/Y Combination switch input 4 ON
G Wiper dial position 4
SKIA5292E
G Light switch and wiper switch OFF
4 Y Combination switch input 3 ON
G Wiper dial position 4
SKIA5291E
5 G/B Combination switch input 2
G Light switch and wiper switch OFF
ON
6 V Combination switch input 1 G Wiper dial position 4
SKIA5292E
G Light switch and wiper switch OFF
32 R/G Combination switch output 5 ON
G Wiper dial position 4
SKIA5291E
G Light switch and wiper switch OFF
33 R/Y Combination switch output 4 ON
G Wiper dial position 4
SKIA5292E
G Light switch and wiper switch OFF
34 L Combination switch output 3 ON
G Wiper dial position 4
SKIA5291E
Revision: August 2007 WW-12 2004 QX56
FRONT WIPER AND WASHER SYSTEM
Measuring condition
Terminal Wire Reference Value (V) A
Signal name Igni-
No. color tion Operation or condition (Approx.)
switch
35 O/B Combination switch output 2 B
G Light switch and wiper switch OFF
ON C
36 R/W Combination switch output 1 G Wiper dial position 4
SKIA5292E
D
38 W/L Ignition switch (ON) ON -- Battery voltage
39 W CAN-H ON -- --
40 R CAN-L ON -- -- E
67 B Ground -- -- 0V
70 W/B Battery power OFF -- Battery voltage
F
Terminals and Reference Values for IPDM E/R EKS007FB
Measuring condition
Terminal Wire Reference value (V) G
Signal name Ignition
No. color Operation or condition (Approx.)
switch
OFF 0V H
32 L Low speed signal ON Wiper switch
LO Battery voltage
OFF 0V
35 L/B High speed signal ON Wiper switch
HI Battery voltage I
Wiper operating Battery voltage
43 L/Y Wiper auto stop signal ON
Wiper stopped 0V
J
38 B Ground -- -- 0V
39 W CAN-H ON -- --
40 R CAN-L ON -- -- WW
59 B Ground -- -- 0V
Work Flow EKS007FC L
1. Confirm the symptom or customer complaint.
2. Understand the system description, refer to WW-4, "System Description" .
M
3. Perform preliminary inspection, refer to WW-13, "Preliminary Inspection" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does wiper function operate normally? If it operates normally, GO TO 6. If not, GO TO 4.
6. Inspection End.
Preliminary Inspection EKS007FD
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
Inspection procedure
1. CHECK FUSE
Check if wiper or washer fuse is blown.
Unit Power source Fuse and fusible link No.
Front and rear washer motor Ignition switch ON or START 9
Front wiper relay Battery 39
Revision: August 2007 WW-13 2004 QX56
FRONT WIPER AND WASHER SYSTEM
Unit Power source Fuse and fusible link No.
Ignition switch ON or START 59
BCM
Battery f
OK or NG
OK >> GO TO 2.
NG >> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse
or fusible link. Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connectors.
2. Check voltage between BCM harness connector terminals and
ground.
BCM Ignition switch position
(+)
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