Back up INFINITI QX56 2004 Factory Service Manual

TF-94
TROUBLE DIAGNOSES FOR SYMPTOMS
Revision: August 20072004 QX56
Symptom 9. 4WD System Does Not Operate (The Vehicle Cannot Be Put Into
4WD Mode-Hydraulic System Failure)
EDS0018M
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Select “ECU INPUT SIGNALS” in Data Monitor.
2. Put A/T selector lever in D.
3. Turn 4WD shift switch to 4H and back to 2WD while reading out
ON/OFF status of "CL PRES SW".
Without CONSULT-II
Check voltage between transfer control unit harness connector E143
terminal 34 (BR) and ground.
Refer to TF-55, "
TRANSFER CONTROL UNIT INSPECTION
TABLE" .
OK or NG
OK >> 1. Check transfer fluid level.
2. Disassemble transfer unit and check the following.
–Transfer motor
–Main oil pump assembly
–Sub-oil pump assembly
–Oil strainer
–Control valve assembly
–2-4WD shift solenoid valve
–Oil filter element
–Lip seal
–Strainer O-ring
–Main oil pump drive gear
–Seal ring
–D-ring
–Clutch piston
–Clutch assembly
NG >> GO TO 2.
2. CHECK CLUTCH PRESSURE CIRCUIT
Check clutch pressure switch circuit.
Refer to TF-72, "
Diagnostic Procedure" .
OK or NG
OK >> GO TO 3.
NG >> Check, repair or replace faulty parts.
3. CHECK PROCEDURES FROM THE BEGINNING
Check again.
OK or NG
OK >> Inspection End.
NG >> Recheck each connector pin terminals for damage or loose connection.
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FRONT WIPER AND WASHER SYSTEM
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Revision: August 20072004 QX56
ACTIVE TEST
Operation Procedure
1. Touch “WIPER” on the “SELECT TEST ITEM” screen.
2. Touch “ACTIVE TEST” on the “SELECT DIAG MODE” screen.
3. Touch item(s) to be tested and check operation of the selected item(s).
4. During the operation check, touching “BACK” deactivates the operation.
Display Item List
CONSULT-II Function (IPDM E/R)EKS007FF
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II OPERATION
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and CON-
SULT-II CONVERTER to the data link connector, then turn the
ignition switch ON.
2. Touch "START (NISSAN BASED VHCL)".
Te s t i t e mDisplay on CONSULT-II
screenDescription
Front wiper HI output FR WIPER (HI) Front wiper HI can be operated by any ON-OFF operation.
Front wiper LO output FR WIPER (LO) Front wiper LO can be operated by any ON-OFF operation.
Front wiper INT output FR WIPER (INT) Front wiper INT can be operated by any ON-OFF operation.
IPDM E/R diagnostic Mode Description
SELF-DIAG RESULTS Displays IPDM E/R self-diagnosis results.
DATA MONITOR Displays IPDM E/R input/output data in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
BBIA0369E
BCIA0029E

FRONT WIPER AND WASHER SYSTEM
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Revision: August 20072004 QX56
ACTIVE TEST
Operation Procedure
1. Touch “WIPER” on the “SELECT TEST ITEM” screen.
2. Touch “ACTIVE TEST” on the “SELECT DIAG MODE” screen.
3. Touch item(s) to be tested and check operation of the selected item(s).
4. During the operation check, touching “BACK” deactivates the operation.
Display Item List
Trouble DiagnosisEKS007FG
FRONT WIPER DOES NOT OPERATE
CAUTION:
During IPDM E/R fail-safe control, front wipers may not operate. Refer to PG-17, "
CAN COMMUNICA-
TION LINE CONTROL" to make sure that it is not in fail-safe status.
Inspection Procedure
1. CHECK IPDM E/R TO FRONT WIPERS
With CONSULT-II
1. Select "IPDM E/R" with CONSULT-II, and select "ACTIVE
TEST" on "SELECT DIAG MODE" screen.
2. Select "FRONT WIPER" on "SELECT TEST ITEM" screen.
Without CONSULT-II
1. Turn on front wipers using auto active test. Refer to PG-23,
"Auto Active Test" .
2. Confirm front wiper operation.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
Te s t i t e mCONSULT-II
screen displayDescription
Front wiper (HI, LO) output FRONT WIPER With a certain operation (OFF, HI, LO) front wiper relays can be operated.
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REAR WIPER AND WASHER SYSTEM
Revision: August 20072004 QX56
4. Select the desired part to be diagnosed on the “SELECT TEST
ITEM” screen.
DATA MONITOR
Operation Procedure
1. Touch “WIPER” on “SELECT TEST ITEM” screen.
2. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
3. Touch either “ALL SIGNALS” or “SELECTION FROM MENU” on “SELECT MONITOR ITEM” screen.
4. Touch “START”.
5. When “SELECTION FROM MENU” is selected, touch items to be monitored. When “ALL SIGNALS” is
selected, all the items will be monitored.
6. Touch “RECORD” while monitoring, then the status of the monitored item can be recorded. To stop
recording, touch “STOP”.
Display Item List
ACTIVE TEST
Operation Procedure
1. Touch “WIPER” on the “SELECT TEST ITEM” screen.
2. Touch “ACTIVE TEST” on the “SELECT DIAG MODE” screen.
3. Touch item to be tested and check operation of the selected item.
4. During the operation check, touching “BACK” deactivates the operation.
LKIA0183E
ALL SIGNALS Monitors all the items.
SELECTION FROM MENU Selects and monitors the individual item selected.
Monitor item name
“OPERATION OR UNIT”Contents
IGN ON SW “ON/OFF” Displays “IGN Position (ON)/OFF, ACC Position (OFF)” status as judged from ignition switch signal.
IGN SW CAN “ON/OFF”Displays “IGN Position (ON)/OFF, ACC Position (OFF)” status as judged from CAN communica-
tions.
FR WIPER INT “ON/OFF” Displays “Front Wiper INT (ON)/Other (OFF)” status as judged from wiper switch signal.
FR WIPER LOW “ON/OFF” Displays “Front Wiper LOW (ON)/Other (OFF)” status as judged from wiper switch signal.
FR WIPER HI “ON/OFF” Displays “Front Wiper HI (ON)/Other (OFF)” status as judged from wiper switch signal.
FR WASHER SW “ON/OFF” Displays “Front Washer Switch (ON)/Other (OFF)” status as judged from wiper switch signal.
INT VOLUME (1 - 7) Displays intermittent operation dial position setting (1 - 7) as judged from wiper switch signal.
VEHICLE SPEED “0.0 km/h” Displays vehicle speed as received over CAN communication.
FR WIPER STOP “ON/OFF” Displays “Stopped (ON)/Operating (OFF)” status as judged from the auto stop signal.
RR WIPER INT “ON/OFF” Displays “Rear Wiper INT (ON)/Other (OFF)” status as judged from wiper switch signal.
RR WIPER ON “ON/OFF” Displays “Rear Wiper (ON)/Other (OFF)” status as judged from wiper switch signal.
RR WASHER SW “ON/OFF” Displays “Rear Washer Switch (ON)/Other (OFF)” status as judged from wiper switch signal.
RR WIPER STOP “ON/OFF” Displays “Stopped (OFF)/Operating (ON)” status as judged from the auto stop switch 1.
RR AUTO STP 2 “ON/OFF” Displays “Stopped (OFF)/Operating (ON)” status as judged from the auto stop switch 2.

REAR WIPER AND WASHER SYSTEM
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Revision: August 20072004 QX56
Removal and Installation of Rear Wiper Motor EKS007G1
REMOVAL
1. Remove rear wiper arm. Refer to WW-50, "Removal and Instal-
lation of Rear Wiper Arm, Adjustment of Rear Wiper Arm Stop
Location" .
2. Remove pivot cap.
3. Remove back door finisher lower. Refer to EI-41, "
BACK DOOR
TRIM" .
4. Remove the hatch glass latch. Refer to BL-136, "
BACK DOOR
LOCK" .
5. Disconnect rear wiper motor connector.
6. Remove rear wiper motor mounting bolts, and remove rear
wiper motor.
INSTALLATION
CAUTION:

Do not drop the wiper motor or cause it to contact other parts.
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1. Wiper arm cover 2. Wiper arm and blade 3. Pivot cap
4. Rear wiper motor 5. Wiper arm stop 6. Rear wiper arm mounting nut
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REAR WIPER AND WASHER SYSTEM
Revision: August 20072004 QX56
1. Clean up the pivot area as illustrated. This will reduce possibility
of wiper arm looseness.
2. Install rear wiper motor to the vehicle.
3. Connect rear wiper motor connector.
4. Install hatch glass latch and adjust as necessary. Refer to BL-
136, "BACK DOOR LOCK" .
5. Install back door finisher lower. Refer to EI-41, "
BACK DOOR
TRIM" .
6. Attach pivot cap.
7. Attach wiper arm. Refer to WW-50, "
Removal and Installation of
Rear Wiper Arm, Adjustment of Rear Wiper Arm Stop Location"
.
Rear Washer Nozzle AdjustmentEKS007G2

This vehicle is equipped with a non-adjustable rear washer nozzle.

If not satisfied with washer fluid spray coverage, confirm that the washer nozzle is installed correctly.

If the washer nozzle is installed correctly, and the washer fluid spray coverage is not satisfactory, replace
the washer nozzle.
Rear Washer Tube LayoutEKS007G3
Removal and Installation of Rear Washer NozzleEKS007G4
REMOVAL
1. Remove the rear spoiler. Refer to EI-26, "REAR SPOILER" .
2. Remove rear washer tube from nozzle.
3. Release retaining clips, and remove washer nozzle.
INSTALLATION
Installation is in the reverse order of removal.
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