2001 INFINITI QX4 battery

ohmmeter, contact by a single strand of wire will give reading of 0
ohms. This would indicate a good circuit. When the circuit operates,
this single strand of wire is not able to carry the current. The single
strand will have a high resistance to the current. This will be picked
up as a slight voltage drop.
Unwanted resistance can be caused by many situations as follows:
IUndersized wiring (single strand example)
ICorrosion on switch contacts
ILoose wire connections or splices.
If repairs are needed always use wire that is of the same or larger
gauge.
Measuring Voltage Drop Ð Accumulated Method
1) Connect the voltmeter across the connector or part of the cir-
cuit you want to check. The positive lead of the voltmeter
should be closer to power and the negative lead closer to
ground.
2) Operate the circuit.
3) The voltmeter will indicate how many volts are being used to
ªpushº current through that part of the circuit.
Note in the illustration that there is an excessive 4.1 volt drop
between the battery and the bulb.
SGI974
Measuring Voltage Drop Ð Step by Step
The step by step method is most useful for isolating excessive
drops in low voltage systems (such as those in ªComputer Con-
trolled Systemsº).
Circuits in the ªComputer Controlled Systemº operate on very low
amperage.
The (Computer Controlled) system operations can be adversely
affected by any variation in resistance in the system. Such resis-
tance variation may be caused by poor connection, improper
installation, improper wire gauge or corrosion.
The step by step voltage drop test can identify a component or wire
with too much resistance.
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HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT
Circuit Inspection (Cont'd)
GI-31

SGI854
CONTROL UNIT CIRCUIT TESTNBGI0004S0307System Description: When the switch is ON, the control unit lights
up the lamp.
MGI034A
Input-output voltage chart
Pin No. Item ConditionVoltage
value [V]In case of high resistance such as single strand [V]
*
1 Switch Switch ON Battery voltage Lower than battery voltage Approx. 8 (Example)
Switch OFF Approx. 0 Approx. 0
2 Lamp Switch ON Battery voltage Approx. 0 (Inoperative lamp)
Switch OFF Approx. 0 Approx. 0
The voltage value is based on the body ground.
* : If high resistance exists in the switch side circuit (caused by a single strand), terminal 1 does not detect battery voltage. Control unit
does not detect the switch is ON even if the switch does not turn ON. Therefore, the control unit does not supply power to light up the
lamp.
HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT
Circuit Inspection (Cont'd)
GI-32

MGI035A
Input-output voltage chart
Pin No. Item ConditionVoltage
value [V]In case of high resistance such as single strand [V]
*
1 Lamp Switch ON Approx. 0 Battery voltage (Inoperative lamp)
Switch OFF Battery voltage Battery voltage
2 Switch Switch ON Approx. 0 Higher than 0 Approx. 4 (Example)
Switch OFF Approx. 5 Approx. 5
The voltage value is based on the body ground.
* : If high resistance exists in the switch side circuit (caused by a single strand), terminal 2 does not detect approx. 0V. Control unit
does not detect the switch is ON even if the switch does not turn ON. Therefore, the control unit does not control ground to light up the
lamp.
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HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT
Circuit Inspection (Cont'd)
GI-33

NBGI0005
NOTICE:
Trouble diagnoses indicates work procedures required to diagnose
problems effectively. Observe the following instructions before
diagnosing.
1)Before performing trouble diagnoses, read the ªPrelimi-
nary Checkº, the ªSymptom Chartº or the ªWork Flowº.
2)After repairs, re-check that the problem has been com-
pletely eliminated.
3)Refer to Component Parts and Harness Connector Loca-
tion for the Systems described in each section for
identification/location of components and harness con-
nectors.
4)Refer to the Circuit Diagram for quick pinpoint check.
If you need to check circuit continuity between harness
connectors in more detail, such as when a sub-harness is
used, refer to Wiring Diagram in each individual section
and Harness Layout in EL section for identification of har-
ness connectors.
5)When checking circuit continuity, ignition switch should
be OFF.
6)Before checking voltage at connectors, check battery volt-
age.
7)After accomplishing the Diagnostic Procedures and Elec-
trical Components Inspection, make sure that all harness
connectors are reconnected as they were.
HOW TO FOLLOW TROUBLE DIAGNOSIS
GI-34

How to Follow Test Groups in Trouble
Diagnosis
NBGI0005S01
SGI138A
1)Work and diagnostic procedure
Start to diagnose a problem using procedures indicated in
enclosed test groups.
2)Questions and required results.
Questions and required results are indicated in bold type in test
group.
The meaning of are as follows:
a. Battery voltage®11 - 14V or approximately 12V
b. Voltage: Approximately 0V®Less than 1V
3)Symbol used in illustration
Symbols included in illustrations refer to measurements or pro-
cedures. Before diagnosing a problem, familiarize yourself with
each symbol. Refer to ªCONNECTOR SYMBOLSº (GI-15) and
ªKey to Symbols Signifying Measurements or Proceduresº (GI-
36).
4)Action items
Next action for each test group is indicated based on result of
each question. Test group number is shown in the left upper
portion of each test group.
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HOW TO FOLLOW TROUBLE DIAGNOSIS
How to Follow Test Groups in Trouble Diagnosis
GI-35

Key to Symbols Signifying Measurements or
Procedures
NBGI0005S02
Symbol Symbol explanation Symbol Symbol explanation
Check after disconnecting the con-
nector to be measured.Procedure with Generic Scan Tool
(GST, OBD-II scan tool)
Check after connecting the connec-
tor to be measured.Procedure without CONSULT-II or
GST
Insert key into ignition switch.A/C switch is ªOFFº.
Remove key from ignition switch.A/C switch is ªONº.
Turn ignition switch to ªOFFº posi-
tion.REC switch is ªONº.
Turn ignition switch to ªONº position.REC switch is ªOFFº.
Turn ignition switch to ªSTARTº posi-
tion.Fan switch is ªONº. (At any position
except for ªOFFº position)
Turn ignition switch from ªOFFº to
ªACCº position.Fan switch is ªOFFº.
Turn ignition switch from ªACCº to
ªOFFº position.Apply positive voltage from battery
with fuse directly to components.
Turn ignition switch from ªOFFº to
ªONº position.Drive vehicle.
Turn ignition switch from ªONº to
ªOFFº position.Disconnect battery negative cable.
Do not start engine, or check with
engine stopped.Depress brake pedal.
Start engine, or check with engine
running.Release brake pedal.
Apply parking brake.Depress accelerator pedal.
Release parking brake.Release accelerator pedal.
HOW TO FOLLOW TROUBLE DIAGNOSIS
Key to Symbols Signifying Measurements or Procedures
GI-36

Diagnostic
test modeFunction ENGINEALL-
MODE
4WDA/T ABSAIR
BAGIVCS*1IVIS
(NATS)*2SMART
EN-
TRANCE
Registered
dataDisplay the VIN, etc. data
registered in the IVCS
unit.ÐÐÐÐÐ x ÐÐ
Configura-
tionIThe IVCS system can
be set up in the dem-
onstration mode to
confirm system opera-
tion.
IVarious data related to
both the Communica-
tor Response Center
contract and cellular
provider can be
written/rewritten in this
mode.ÐÐÐÐÐ x ÐÐ
REMO
CONT ID
SET UPA maximum of four IDs
(identifications) can be
registered in the memory
using the remote control-
ler. These IDs can be
also be confirmed and
erased as required.ÐÐÐÐÐÐÐ x
x: Applicable
*1: INFINITI Communicator (IVCS)
*2: IVIS (NATS) [INFINITI Vehicle Immobilizer System (Nissan Anti-Theft System)]
Nickel Metal Hydride Battery ReplacementNBGI0006S06CONSULT-II contains a nickel metal hydride battery. When replacing the battery obey the following:
WARNING:
Replace the nickel metal hydride battery with Genuine CONSULT-II battery only. Use of another bat-
tery may present a risk of fire or explosion. The battery may present a fire or chemical burn hazard if
mistreated. Do not recharge, disassemble of dispose of in fire.
Keep the battery out of reach of children and discard used battery conforming to the local regulations.
Checking EquipmentNBGI0006S07When ordering the below equipment, contact your NISSAN/INFINITI distributor.
Tool name Description
NISSAN CONSULT-II
q
1CONSULT-II unit (Tester internal soft:
Resident version 3.2.0) and accessories
q
2Program card AED99C (Version 3.0)
and UEN99A (For IVIS and IVCS)
To confirm the best combination of these
softwares, refer to CONSULT-II Operation
Manual.
SGI100A
NOTE:
IThe CONSULT-II must be used in conjunction with a program card.
CONSULT-II does not require loading (Initialization) procedure.
IBe sure the CONSULT-II is turned off before installing or removing a program card.
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CONSULT-II CHECKING SYSTEM
Function and System Application (Cont'd)
GI-39

Tool number
(Kent-Moore No.)
Tool nameDescription
(J-43926)
Refrigerant dye leak
detection kit
Kit includes:
(J-42220) UV lamp and
UV safety glasses
(J-41459) Refrigerant
dye injector
(J-41447) qty. 24
R-134a refrigerant dye
(J-43872) Refrigerant
dye cleaner
SHA437F
Power supply:
DC 12V (Battery terminal)
(J-42220)
Fluorescent dye leak
detectorUV lamp
SHA438F
Power supply: DC 12V (Battery terminal)
For checking refrigerant leak when fluorescent dye
is installed in A/C system.
Includes: UV lamp and UV safety glasses
UV safety glasses
(J-41447)
R134a Fluorescent Leak
Detection Dye (Box of
24, 1/4 ounce bottles)Dye
SHA439F
Application: For R-134a PAG oil
Container: 1/4 ounce (7.4 cc) bottle
(Includes self-adhesive dye identification labels for
affixing to vehicle after charging system with dye.)
(J-41459)
R134a Dye Injector
Use with J-41447, 1/4
ounce bottleDye injector
SHA440F
For injecting 1/4 ounce of Fluorescent Leak Detec-
tion Dye into A/C system.
(J-43872)
Dye cleaner
SHA441F
For cleaning dye spills.
(J-39183)
Manifold gauge set (with
hoses and couplers)
NT199
Identification:
IThe gauge face indicates R-134a.
Fitting size: Thread size
I1/2²-16 ACME
PREPARATION
HFC-134a (R-134a) Service Tools and Equipment (Cont'd)
HA-12