INFINITI QX56 2008 Factory Service Manual

PRECAUTIONSGI-29
< PRECAUTION >
C
DE
F
G H
I
J
K L
M B
GI
N
O P
Dispose of used oil and used oil filters through authorized waste disposal contractors to licensed waste dis-
posal sites, or to the waste oil reclamation trade. If in doubt, contact the local authority for advice on disposal
facilities.
It is illegal to pour used oil on to the ground, down sewers or drains, or into water sources.
The regulations concerning po llution vary between regions.
Air ConditioningINFOID:0000000001539216
Use an approved refrigerant recovery unit any time t he air conditioning system must be discharged. Refer to
HA-20, "
HFC-134a (R-134a) Service Procedure".
Revision: March 2010 2008 QX56

GI-30
< PRECAUTION >
LIFTING POINT
LIFTING POINT
Pantograph JackINFOID:0000000004900860
WARNING:
• Never get under the vehicle while it is supported only by the jack. Always use safety stands to sup-
port the frame when you have to get under the vehicle.
• Place wheel chocks at both front an d back of the wheels on the ground.
Garage Jack and Safety StandINFOID:0000000004900861
CAUTION:
Place a wooden or rubber block between safety stand and vehicle body when the supporting body is
flat.
2-Pole LiftINFOID:0000000004900862
WARNING:
• When lifting the vehicle, open the lift arms as wid e as possible and ensure that the front and rear of
the vehicle are well balanced.
WAIA0041E
WAIA0028E
Revision: March 2010 2008 QX56

LIFTING POINTGI-31
< PRECAUTION >
C
DE
F
G H
I
J
K L
M B
GI
N
O P
• When setting the lift arm, do not allow the arm to contact the brake tubes, brake cable, or fuel lines.
WAIA0029E
Revision: March 2010 2008 QX56

GI-32
< PRECAUTION >
TOW TRUCK TOWING
TOW TRUCK TOWING
Tow Truck TowingINFOID:0000000004900863
WARNING:
• Never get under the vehicle while it is supported only by the jack. Always use safety stands to sup-
port the frame when you have to get under the vehicle.
• Place wheel chocks at both front an d back of the wheels on the ground.
CAUTION:
• All applicable local laws regarding the towing operation must be obeyed.
• It is necessary to use proper towing equipment to avoid possible damage during towing operation.
Towing is in accordance with Towing Procedure Manual at dealer.
• Always attach safety chains before towing.
• When towing, make sure that the transmission, steering system and power train are in good order. If
any unit is damaged, dollies must be used.
• Never tow an automatic transmission model from the rear
(i.e., backward) with four wh eels on the ground as this may
cause serious and expensive dama ge to the transmission.
4WD MODEL
INIFINTI does not recommend towing automatic transmi ssion equipped vehicles with the drive wheels on the
ground.
CAUTION:
• Never tow 4WD models with any of the tires on the ground as this may cause serious and expensive
damage to the transfer case and transmission.
Towiing Point
CAUTION:
WAIA0030E
WAIA0032E
Revision: March 2010 2008 QX56

TOW TRUCK TOWINGGI-33
< PRECAUTION >
C
DE
F
G H
I
J
K L
M B
GI
N
O P
Never tow the vehicle using only the towing points. To avoid
damaging the vehicle body, use propeer towing equipment
when towing.
Vehicle Recovery (Freeing a stuck vehicle)INFOID:0000000004900864
• Tow chains or cables must be attached only to the main structural members of the vehicle.
• Pulling devices should be routed so they do not touch any part of the suspension, steering, brake or
cooling systems
• Always pull the cable straight out from the front or rear of the vehicle. Never pull the vehicle at a
sideways angle.
• Pulling devices such as ropes or canvas straps are not recommended for use for vehicle towing or
recovery.
WAIA0055E
Revision: March 2010 2008 QX56

GI-34
< BASIC INSPECTION >
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
BASIC INSPECTION
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Work FlowINFOID:0000000001539223
WORK FLOW
Control Units and Electrical PartsINFOID:0000000001539224
PRECAUTIONS
• Never reverse polarity of battery terminals.
• Install only parts specified for a vehicle.
• Before replacing the control unit, check the i nput and output and functions of the component parts.
• Do not apply excessive force when disconnecting a connector.
SGI838
STEP DESCRIPTION
STEP 1 Get detailed information about the conditions and the environment when the incident occurred.
The following are key pieces of information required to make a good analysis:
WHAT
Vehicle Model, Engine, Transmission/Transaxle and the System (i.e. Radio).
WHEN Date, Time of Day, Weather Conditions, Frequency.
WHERE Road Conditions, Altitude and Traffic Situation.
HOW System Symptoms, Operating Conditions
(Other Components Interaction).
Service History and if any After Market Accessories have been installed.
STEP 2 Operate the system, road test if necessary.
Verify the parameter of the incident.
If the problem cannot be duplicated, refer to “Incident Simulation Tests”.
STEP 3 Get the proper diagnosis materials together including:
• Power Supply Routing
• System Operation Descriptions
• Applicable Service Manual Sections
• Check for any Service Bulletins
Identify where to begin diagnosis based upon your knowledge of the system operation and the customer comments.
STEP 4 Inspect the system for mechanical binding, loose connectors or wiring damage.
Determine which circuits and components are involved and diagnose using the Power Supply Routing and Harness Lay-
outs.
STEP 5 Repair or replace the incident circuit or component.
STEP 6 Operate the system in all modes. Verify the system works properly under all conditions. Make sure you have not inad-
vertently created a new incident during your diagnosis or repair steps.
Revision: March 2010
2008 QX56

SERVICE INFORMATION FOR ELECTRICAL INCIDENTGI-35
< BASIC INSPECTION >
C
DE
F
G H
I
J
K L
M B
GI
N
O P
• Do not apply excessive shock to the control unit by dropping or hit- ting it.
• Be careful to prevent condensation in the control unit due to rapid
temperature changes and do not let water or rain get on it. If water
is found in the control unit, dry it fully and then install it in the vehi-
cle.
• Be careful not to let oil to get on the control unit connector.
• Avoid cleaning the control unit with volatile oil.
• Do not disassemble the control unit, and do not remove the upper and lower covers.
• When using a DMM, be careful not to let test probes get close to each other to prevent the power transistor in the control unit from
damaging battery voltage because of short circuiting.
• When checking input and output signals of the control unit, use the specified check adapter.
How to Check TerminalINFOID:0000000001539225
CONNECTOR AND TERMINAL PIN KIT
• Use the connector and terminal pin kits listed below when replacing connectors or terminals.
• The connector and terminal pin kits contain some of the most commonly used NISSAN/INFINITI connectors
and terminals. For detailed connector and terminal pin r eplacement procedures, refer to the latest NISSAN/
INFINITI CONNECTOR AND TERMINAL PIN SERVICE MANUAL.
SAIA0255E
SEF348N
Revision: March 2010 2008 QX56

GI-36
< BASIC INSPECTION >
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
HOW TO PROBE CONNECTORS
• Connector damage and an intermittent connection can result from improperly probing of the connector dur-ing circuit checks.
• The probe of a digital multimeter (DMM) may not correctly fit the connector cavity. To correctly probe the connector, follow the procedures below using a “T” pin. For the best contact grasp the “T” pin using an alliga-
tor clip.
Probing from Harness Side
Standard type (not waterproof type) connector should be probed
from harness side with “T” pin.
• If the connector has a rear cover such as a ECM connector,remove the rear cover before probing the terminal.
• Do not probe waterproof connector from harness side. Damage to the seal between wire and connector may result.
Probing from Terminal Side
FEMALE TERMINAL
• There is a small notch above each female terminal. Probe each
terminal with the “T” pin through the notch.
Do not insert any object other than the same type male terminal
into female terminal.
Tool number
(Kent-Moore No.) Tool name Description
-
(J38751-95NI)
Connector and terminal
pin kit (NISSAN)
-
(J38751-95INF)
Connector and terminal
pin kit (INFINITI)
-
(J42992-98KIT)
OBD and terminal repair
kit
-
(J42992-2000UPD)
OBD-II Connector Kit Up-
date
WAIA0004EWAIA0005E
SGI841
SEL265V
Revision: March 2010 2008 QX56

SERVICE INFORMATION FOR ELECTRICAL INCIDENTGI-37
< BASIC INSPECTION >
C
DE
F
G H
I
J
K L
M B
GI
N
O P
• Some connectors do not have a notch above each terminal. To probe each terminal, remove the connector retainer to make con-
tact space for probing.
MALE TERMINAL• Carefully probe the contact surface of each terminal using a “T”pin.
CAUTION:
Dot not bend terminal.
How to Check Enlarged Cont act Spring of Terminal
• An enlarged contact spring of a terminal may create intermittent signals in the circuit.
• If the intermittent open circuit occurs, follow the pr ocedure below to inspect for open wires and enlarged con-
tact spring of female terminal.
1. Assemble a male terminal and approx. 10 cm (3.9 in) of wire. NOTE:
Use a male terminal which matches the female terminal.
2. Disconnect the suspected faulty connector and hold it terminal side up.
3. While holding the wire of the male terminal, try to insert the male terminal into the female terminal.
CAUTION:
Do not force the male terminal into the female terminal with
your hands.
SEL266V
SEL267V
SEL270V
SEL271V
Revision: March 2010 2008 QX56

GI-38
< BASIC INSPECTION >
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
4. While moving the connector, check whether the male terminalcan be easily inserted or not.
• If the male terminal can be easily inserted into the female ter-minal, replace the female terminal.
Waterproof Connector Inspection
If water enters the connector, it can short interior circuits. This may lead to intermittent problems.
Check the following items to maintain the original waterproof characteristics.
RUBBER SEAL INSPECTION• Most waterproof connectors are provided with a rubber seal between the male and female connectors. If the seal is missing,
the waterproof performance may not meet specifications.
• The rubber seal may come off when connectors are disconnected.
Whenever connectors are reconnected, make sure the rubber seal
is properly installed on either side of male or female connector.
WIRE SEAL INSPECTION• The wire seal must be installed on the wire insertion area of awaterproof connector. Be sure that the seal is installed properly.
Terminal Lock Inspection
Check for unlocked terminals by pulling wire at the end of connector.
An unlocked terminal may create intermittent signals in the circuit.
Intermittent IncidentINFOID:0000000001539226
DESCRIPTION
Sometimes the symptom is not present when the vehicle is brought in for service. If possible, re-create the
conditions present at the time of the incident. Doi ng so may help avoid a No Trouble Found Diagnosis. The fol-
SEL272V
SEL273V
SEL275V
SEL330V
Revision: March 2010 2008 QX56