Nissan Frontier D22. Manual - part 743

GI-4

PRECAUTIONS

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Before starting repairs which do not require battery power:
Turn off ignition switch.
Disconnect the negative battery terminal.

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If the battery terminals are disconnected, recorded memory of
radio and each control unit is erased.

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To prevent serious burns:
Avoid contact with hot metal parts.
Do not remove the radiator cap when the engine is hot.

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Dispose of drained oil or the solvent used for cleaning parts in
an appropriate manner.

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Do not attempt to top off the fuel tank after the fuel pump nozzle
shuts off automatically.
Continued refueling may cause fuel overflow, resulting in fuel
spray and possibly a fire.

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Clean all disassembled parts in the designated liquid or solvent
prior to inspection or assembly.

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Replace oil seals, gaskets, packings, O-rings, locking washers, cotter pins, self-locking nuts, etc. with new
ones.

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Replace inner and outer races of tapered roller bearings and needle bearings as a set.

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Arrange the disassembled parts in accordance with their assembled locations and sequence.

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Do not touch the terminals of electrical components which use microcomputers (such as ECM).
Static electricity may damage internal electronic components.

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After disconnecting vacuum or air hoses, attach a tag to indicate the proper connection.

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Use only the fluids and lubricants specified in this manual.

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Use approved bonding agent, sealants or their equivalents when required.

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Use hand tools, power tools (disassembly only) and recom-
mended special tools where specified for safe and efficient ser-
vice repairs.

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When repairing the fuel, oil, water, vacuum or exhaust systems,
check all affected lines for leaks.

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Before servicing the vehicle:
Protect fenders, upholstery and carpeting with appropriate cov-
ers.
Take caution that keys, buckles or buttons do not scratch paint.

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PRECAUTIONS

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WARNING:

To prevent ECM from storing the diagnostic trouble codes, do not carelessly disconnect the harness
connectors which are related to the engine control system and TCM (transmission control module)
system. The connectors should be disconnected only when working according to the WORK FLOW of
TROUBLE DIAGNOSES in EC and AT sections.

Precautions for Three Way Catalyst

EAS00126

If a large amount of unburned fuel flows into the catalyst, the catalyst temperature will be excessively high. To
prevent this, follow the instructions.

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Use unleaded gasoline only. Leaded gasoline will seriously damage the three way catalyst.

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When checking for ignition spark or measuring engine compression, make tests quickly and only when
necessary.

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Do not run engine when the fuel tank level is low, otherwise the engine may misfire, causing damage to
the catalyst.

Do not place the vehicle on flammable material. Keep flammable material off the exhaust pipe and the three
way catalyst.

Precautions for Fuel (Unleaded Regular Gasoline Recommended)

EAS00127

Use unleaded regular gasoline with an octane rating of at least 87 AKI (Anti-Knock Index) number (Research
octane number 91).

CAUTION:

Do not use leaded gasoline. Using leaded gasoline will damage the three way catalyst. Using a fuel
other than that specified could adversely affect the emission control devices and systems, and could
also affect the warranty coverage validity.

Precautions for Fuel (Unleaded Premium Gasoline Required)

EAS00128

Use unleaded premium gasoline with an octane rating of at least 91 AKI (Anti-Knock Index) number (Research
octane number 96).

If unleaded premium gasoline is not available, unleaded regular gasoline with an octane rating of at least 87
AKI number (Research octane number 91) can be used, but only under the following precautions:

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have the fuel tank filled only partially with unleaded regular gasoline, and fill up with unleaded premium
gasoline as soon as possible.

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avoid full throttle driving and abrupt acceleration.

However, for maximum vehicle performance, the use of unleaded premium gasoline is recommended.

CAUTION:

Do not use leaded gasoline. Using leaded gasoline will damage the three way catalyst. Using a fuel
other than that specified could adversely affect the emission control devices and systems, and could
also affect the warranty coverage validity.

Precautions for Multiport Fuel Injection System or Engine Control System

EAS00129

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Before connecting or disconnecting any harness connector for
the multiport fuel injection system or ECM:
Turn ignition switch to “OFF” position.
Disconnect negative battery terminal.
Otherwise, there may be damage to ECM.

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Before disconnecting pressurized fuel line from fuel pump to
injectors, be sure to release fuel pressure.

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Be careful not to jar components such as ECM and mass air
flow sensor.

SGI787

GI-6

PRECAUTIONS

Precautions for Hoses

EAS0012A

HOSE REMOVAL AND INSTALLATION

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To prevent damage to rubber hose, do not pry off rubber hose
with tapered tool or screwdriver.

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To reinstall the rubber hose securely, make sure of hose inser-
tion length and clamp orientation. (If tube is equipped with hose
stopper, insert rubber hose into tube until it butts up against
hose stopper.)

HOSE CLAMPING

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If old rubber hose is re-used, install hose clamp in its original
position (at the indentation where the old clamp was). If there is
a trace of tube bulging left on the old rubber hose, align rubber
hose at that position.

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Discard old clamps; replace with new ones.

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After installing leaf spring clamps, apply force to them in the
direction of the arrow, tightening rubber hose equally all around.

Precautions for Engine Oils

EAS0012B

Prolonged and repeated contact with used engine oil may cause skin cancer. Try to avoid direct skin contact
with used oil.
If skin contact is made, wash thoroughly with soap or hand cleaner as soon as possible.

HEALTH PROTECTION PRECAUTIONS 

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Avoid prolonged and repeated contact with oils, particularly used engine oils.

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PRECAUTIONS

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Wear protective clothing, including impervious gloves where practicable.

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Do not put oily rags in pockets.

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Avoid contaminating clothes, particularly underpants, with oil.

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Heavily soiled clothing and oil-impregnated footwear should not be worn. Overalls must be cleaned regu-
larly.

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First aid treatment should be obtained immediately for open cuts and wounds.

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Use barrier creams, applying them before each work period, to help the removal of oil from the skin.

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Wash with soap and water to ensure all oil is removed (skin cleansers and nail brushes will help). Prepa-
rations containing lanolin replace the natural skin oils which have been removed.

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Do not use gasoline, kerosene, diesel fuel, gas oil, thinners or solvents for cleaning skin.

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If skin disorders develop, obtain medical advice without delay.

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Where practical, degrease components prior to handling.

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Where there is a risk of eye contact, eye protection should be worn, for example, chemical goggles or face
shields; in addition an eye wash facility should be provided.

ENVIRONMENTAL PROTECTION PRECAUTIONS 

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 pollution vary between regions.

Precautions for Air Conditioning

EAS0012C

Use an approved refrigerant recovery unit any time the air conditioning system must be discharged. Refer to
MTC section “HFC-134a (R-134a) Service Procedure”, “REFRIGERANT LINES” for specific instructions.