2005 INFINITI QX4 Factory Service Manual

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Page 2121 of 3419

INFINITI QX4 2005 Factory Service Manual GI-20
HOW TO USE THIS MANUAL
Revision: October 20052005 QX56
A line with regular weight (wider line) represents a “detectable
line for DTC (Diagnostic Trouble Code)”. A “detectable line for
DTC

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INFINITI QX4 2005 Factory Service Manual HOW TO USE THIS MANUAL
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Revision: October 20052005 QX56
The switch diagram is used in wiring diagrams.
SG I8 75

Page 2123 of 3419

INFINITI QX4 2005 Factory Service Manual GI-22
HOW TO USE THIS MANUAL
Revision: October 20052005 QX56
Reference Area
The Reference Area of the wiring diagram contains references to additional electrical reference pages at the
end of the manu

Page 2124 of 3419

INFINITI QX4 2005 Factory Service Manual HOW TO USE THIS MANUAL
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Revision: October 20052005 QX56D3Drive range 3rd gear
D
4Drive range 4th gear
FR, RR Front, Rear
LH, RH Left-Hand, Right-Hand
M/T Manual Transaxl

Page 2125 of 3419

INFINITI QX4 2005 Factory Service Manual GI-24
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Revision: October 20052005 QX56
SERVICE INFORMATION FOR ELECTRICAL INCIDENTPFP:00000
How to Check Terminal EAS001FM
CONNECTOR AND TERMINAL PIN KIT
Use

Page 2126 of 3419

INFINITI QX4 2005 Factory Service Manual SERVICE INFORMATION FOR ELECTRICAL INCIDENT
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Some connectors do not have a notch above each terminal. To
probe each terminal, remove the

Page 2127 of 3419

INFINITI QX4 2005 Factory Service Manual GI-26
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Revision: October 20052005 QX56
4. While moving the connector, check whether the male terminal
can be easily inserted or not.
If the male terminal ca

Page 2128 of 3419

INFINITI QX4 2005 Factory Service Manual SERVICE INFORMATION FOR ELECTRICAL INCIDENT
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How to Perform Efficient Diagnosis for an Electrical IncidentEAS001FN
WORK FLOW
INCIDENT SIM

SERVICE INFORMATION FOR ELECTRICAL INCIDENT
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Revision: October 20052005 QX56
How to Perform Efficient Diagnosis for an Electrical IncidentEAS001FN
WORK FLOW
INCIDENT SIMULATION TESTS
Introduction
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. Doing so may help avoid a No Trouble Found Diagnosis. The fol-
lowing section illustrates ways to simulate the conditions/environment under which the owner experiences an
electrical incident.
The section is broken into the six following topics:
Vehicle vibration
Heat sensitive
SG I8 38
STEP DESCRIPTION
STEP 1Get 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:
WHATVehicle Model, Engine, Transmission/Transaxle and the System (i.e. Radio).
WHENDate, Time of Day, Weather Conditions, Frequency.
WHERERoad Conditions, Altitude and Traffic Situation.
HOWSystem Symptoms, Operating Conditions (Other Components Interaction).
Service History and if any After Market Accessories have been installed.
STEP 2Operate the system, road test if necessary.
Verify the parameter of the incident.
If the problem cannot be duplicated, refer to “Incident Simulation Tests”.
STEP 3Get 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 4Inspect 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
Layouts.
STEP 5 Repair or replace the incident circuit or component.
STEP 6Operate 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.

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