2004 INFINITI QX56 Factory Service Manual

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INFINITI QX56 2004 Factory Service Manual TF-44
TROUBLE DIAGNOSIS — INTRODUCTION
Revision: August 20072004 QX56
TROUBLE DIAGNOSIS — INTRODUCTIONPFP:00000
IntroductionEDS0017W
DESCRIPTION
When a malfunction (indicated by the 4WD warning la

TF-44
TROUBLE DIAGNOSIS — INTRODUCTION
Revision: August 20072004 QX56
TROUBLE DIAGNOSIS — INTRODUCTIONPFP:00000
IntroductionEDS0017W
DESCRIPTION
When a malfunction (indicated by the 4WD warning lamp illumination) occurs, collect information first from the
customer about how the malfunction occurs. Then, proceed with the diagnosis presuming it is the cause. Also
inspect the electrical system, paying close attention to other possibilities such as fluid level and leaks.
All-mode 4WD transfer is controlled by transfer control unit and sensors.
If a malfunction occurs in the all-mode 4WD system, the 4WD warning lamp lights up to inform of the system
malfunction. There are two ways to identify the cause of the malfunction.
1. Performing the self-diagnosis. (The 4WD warning lamp will indicate what kind of malfunction has occurred
by flickering.)
2. Performing diagnosis using CONSULT-II.
DIAGNOSTIC WORKSHEET
Information from Customer
KEY POINTS
WHAT ..... Vehicle model
WHEN..... Date, Frequencies
WHERE..... Road conditions
HOW..... Operating conditions, Symptoms
Diagnostic Worksheet
Information sheet from customer
Customer name MR/MS Model & Year VIN
Transfer model
AT X 1 4 BEngine Mileage
Incident Date Manuf. Date In Service Date
Frequency❏ Continuous ❏ Intermittent ( times a day)
Symptoms❏ 4WD shift indicator lamp does not turn on.
❏ 4WD warning lamp does not turn on.
❏ 4WD shift indicator lamp does not turn off.
❏ ATP warning lamp does not turn on.
❏ 4LO indicator lamp does not turn on.
❏ 4WD shift indicator lamp does not indicate “4H”.
❏ 4WD shift indicator lamp repeats flicking.
❏ Tight corner braking symptom occurs.
❏ 4WD system does not operate.
❏ Others.
4WD warning lamp❏ Continuously lit❏ Not lit
1.❏ Listen to customer complaints.TF-47
2.❏ Check transfer fluid.TF-47
❏ Leakage
❏ Fluid condition
❏ Fluid level
3.❏ Road testingTF-47
❏ 1. Check before engine is started.
❏ 2. Check at idle.
❏ 3. Cruise test
4.❏ Perform self-diagnosis NG items (with CONSULT-II and without CONSULT-II).TF-31
, TF-28

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INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS — INTRODUCTION
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Revision: August 20072004 QX56
5.❏ Check component. Repair or replace the damaged parts.TF-109
6.❏ Perform final check. Perform

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INFINITI QX56 2004 Factory Service Manual TF-46
TROUBLE DIAGNOSIS — INTRODUCTION
Revision: August 20072004 QX56
Work FlowEDS0017X
HOW TO PERFORM TROUBLE DIAGNOSES FOR QUICK AND ACCURATE REPAIR
A good understanding of the malfunction conditi

Page 3172 of 3371

INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS — BASIC INSPECTION
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TROUBLE DIAGNOSIS — BASIC INSPECTIONPFP:00000
Listen to Customer ComplaintsEDS0017Y
Each custom

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INFINITI QX56 2004 Factory Service Manual TF-48
TROUBLE DIAGNOSIS — BASIC INSPECTION
Revision: August 20072004 QX56
1. CHECK BEFORE ENGINE IS STARTED
1. CHECK 4WD SHIFT INDICATOR LAMP
1. Park vehicle on flat surface.
2. Turn ignition switch

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INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS — BASIC INSPECTION
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2. CHECK AT IDLE
1. CHECK 4WD SHIFT INDICATOR LAMP
1. Park vehicle on flat surface.
2. Turn igniti

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INFINITI QX56 2004 Factory Service Manual TF-50
TROUBLE DIAGNOSIS — BASIC INSPECTION
Revision: August 20072004 QX56
3. CHECK 4WD SHIFT INDICATOR LAMP
1. Set 4WD shift switch to 2WD, AUTO, 4H, 4LO, 4H and 2WD in
order.
(Stay at each switch p

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INFINITI QX56 2004 Factory Service Manual TROUBLE DIAGNOSIS — BASIC INSPECTION
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5. CHECK 4WD SHIFT INDICATOR LAMP
1. Move A/T selector lever to P position.
2. Set 4WD shift switc

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