2006 NISSAN FRONTIER engine

Vehicles operated in high temperatures or under
severe conditions require frequent checks of the
battery fluid level.
JUMP STARTING
If jump starting is necessary, see “Jump starting”
in the “In case of emergency” section of this
manual. If the engine does not start by jump
starting, the battery may have to be replaced.
Contact a NISSAN dealer.
CAUTION
cDo not ground accessories directly to
the battery terminal. Doing so will by-
pass the variable voltage control sys-
tem and the vehicle battery may not
charge completely.
cUse electrical accessories with the en-
gine running to avoid discharging the
vehicle battery.
Your vehicle is equipped with a variable voltage
control system. This system measures the
amount of electrical discharge from the battery
and controls voltage generated by the generator.If you add electrical accessories to your vehicle
ground it to the body ground
sAlocated near the
battery along the negative battery cable.
LDI0454
VARIABLE VOLTAGE CONTROL
SYSTEM
Maintenance and do-it-yourself8-17
ZREVIEW COPYÐ2006 Truck/Frontier(d22)
Owners ManualÐUSA_English(nna)
10/17/05Ðdebbie
X

1. Power steering fluid pump
2. Cooling fan
3. Air conditioner compressor
4. Crankshaft
5. Generator
WARNING
Be sure the ignition key is in the OFF or
LOCK position. The engine could rotate
unexpectedly.1. Visually inspect the belt(s) for signs of un-
usual wear, cuts, fraying or looseness. If the
belt is in poor condition or is loose, have it
replaced or adjusted by a NISSAN dealer.
2. Have the belts checked regularly for condi-
tion and tension in accordance with the
maintenance schedule found in the
“NISSAN Service and Maintenance Guide”.
1 Power steering fluid pump
2 Water pump
3 Air conditioner compressor
4 Crankshaft
5 Generator
VQ40DE
LDI0449
QR25DE
LDI0461
DRIVE BELTS
8-18Maintenance and do-it-yourself
ZREVIEW COPYÐ2006 Truck/Frontier(d22)
Owners ManualÐUSA_English(nna)
10/17/05Ðdebbie
X

REPLACING SPARK PLUGS
Platinum-tipped spark plugs
It is not necessary to replace platinum-tipped
spark plugs as frequently as conventional type
spark plugs because they last much longer. Fol-
low the maintenance log shown in the “NISSAN
Service and Maintenance Guide”. Do not service
platinum-tipped spark plugs by cleaning or re-
gapping.
cAlways replace spark plugs with rec-
ommended or equivalent ones.
WARNING
Be sure the engine and ignition switch are
off and that the parking brake is engaged
securely.
CAUTION
Be sure to use the correct socket to re-
move the spark plugs. An incorrect socket
can damage the spark plugs.
If replacement is required, see your NISSAN
dealer for assistance.
The air cleaner filter should not be cleaned and
reused. Replace it according to the maintenance
log shown in the “NISSAN Service and Mainte-
nance Guide.” When replacing the filter, wipe the
inside of the air cleaner filter housing and the
cover with a damp cloth.
To remove the air cleaner filter Type A:
s1Loosen the screw.
s2Disconnect the electrical connector.
s3Push down on the clips and remove the air
cleaner cover. Remove the air cleaner filter.
To remove the air cleaner filter Type B:
WDI0005
Type A
LDI0376
SPARK PLUGSAIR CLEANER
Maintenance and do-it-yourself8-19
ZREVIEW COPYÐ2006 Truck/Frontier(d22)
Owners ManualÐUSA_English(nna)
10/17/05Ðdebbie
X

1. Unlatch the clipssA,sB,sC.
2. Push down half of air cleaner to clear the
bottom retainers.
3. Lift up on half of air cleaner to remove the air
cleaner filter
WARNING
cOperating the engine with the air
cleaner removed can cause you or oth-
ers to be burned. The air cleaner not
only cleans the air, it stops the flame if
the engine backfires. If it isn’t there, and
the engine backfires, you could be
burned. Do not drive with the air cleaner
removed, and be careful when working
on the engine with the air cleaner
removed.
cNever pour fuel into the throttle body or
attempt to start the engine with the air
cleaner removed. Doing so could result
in serious injury.
IN-CABIN MICROFILTER
The in-cabin microfilter restricts the entry of air-
borne dust and pollen particles and reduces
some objectionable outside odors. The filter is
located behind the glove box. Refer to the
“NISSAN Service and Maintenance Guide” for
change intervals.
To replace the filter, perform the following proce-
dure:1. Open the glove box and press in on the
sides so that it will open completely allowing
it to hang by the cord.
Type B
LDI0465LDI0442
8-20Maintenance and do-it-yourself
ZREVIEW COPYÐ2006 Truck/Frontier(d22)
Owners ManualÐUSA_English(nna)
10/17/05Ðdebbie
X

CHECKING PARKING BRAKE
From the released position, pull the parking brake
lever up slowly and firmly. If the number of clicks is
out of the range listed, see a NISSAN dealer.
Range: 6–8 clicks under pulling force of 44 lb
(196 N) .
CHECKING BRAKE PEDAL
With the engine running, check the distanceA
between the upper surface of the pedal and the
metal floor. If it is out of the range listed, see a
NISSAN dealer.
Range: 4.1–4.8 in (103–123 mm) under a de-
pressing force of 110 lb (490 N) .
Self-adjusting brakes
Your vehicle is equipped with self-adjusting
brakes.
The front and rear disc-type brakes self-adjust
every time the brake pedal is applied.
WARNING
See a NISSAN dealer for a brake system
check if the brake pedal height does not
return to normal.
Brake pad wear indicators
The disc brake pads on your vehicle have audible
wear indicators. When a brake pad requires re-
placement, a high pitched scraping or screech-
ing sound will be heard when the vehicle is in
motion. The noise will be heard whether or not the
brake pedal is depressed. Have the brakes
checked as soon as possible if the wear indicator
sound is heard.
Under some driving or climate conditions, occa-
sional brake squeak, squeal or other noise may
be heard. Occasional brake noise during light to
moderate stops is normal and does not affect the
function or performance of the brake system.
Proper brake inspection intervals should
be followed.For more information regarding
brake inspections, see the appropriate mainte-
nance schedule information in the “NISSAN Ser-
vice and Maintenance Guide”.
LDI0476WDI0197
PARKING BRAKE AND BRAKE PEDAL
Maintenance and do-it-yourself8-23
ZREVIEW COPYÐ2006 Truck/Frontier(d22)
Owners ManualÐUSA_English(nna)
10/17/05Ðdebbie
X

BRAKE BOOSTER
Check the brake booster function as follows:
1. With the engine off, press and release the
brake pedal several times. When brake
pedal movement (distance of travel) remains
the same from one pedal application to the
next, continue on to the next step.
2. While depressing the brake pedal, start the
engine. The pedal height should drop a little.
3. With the brake pedal depressed, stop the
engine. Keep the pedal depressed for about
30 seconds. The pedal height should not
change.
4. Run the engine for one minute without de-
pressing the brake pedal, then turn it off.
Depress the brake pedal several times. The
pedal travel distance will decrease gradually
with each depression as the vacuum is re-
leased from the booster.
If the brakes do not operate properly, have the
brakes checked by a NISSAN dealer.Two types of fuses are used. Type A is used in the
fuse boxes in the engine compartment. Type B is
used in the passenger compartment fuse box.
Type A fuses are provided as spare fuses. They
are stored in the passenger compartment fuse
box.
Type A fuses can be installed in the engine com-
partment and passenger compartment fuse
boxes.If a type A fuse is used to replace a type B fuse,
the type A fuse will not be level with the fuse
pocket as shown in the illustration. This will not
affect the performance of the fuse. Make sure the
fuse is installed in the fuse box securely.
Type B fuses cannot be installed in the under-
hood fuse boxes. Only use type A fuses in the
underhood fuse boxes.
LDI0455LDI0457
FUSES
8-24Maintenance and do-it-yourself
ZREVIEW COPYÐ2006 Truck/Frontier(d22)
Owners ManualÐUSA_English(nna)
10/17/05Ðdebbie
X

ENGINE COMPARTMENT
CAUTION
Never use a fuse of a higher or lower
amperage rating than specified on the
fuse box cover. This could damage the
electrical system or cause a fire.
If any electrical equipment does not come on,
check for an open fuse.
1. Be sure the ignition switch and the headlight
switch are OFF.
2. Open the engine hood.3. Remove the fuse box cover by pushing the
tab and lifting the cover up.
4. Remove the fuse with the fuse puller. The
fuse puller is located in the center of the fuse
block in the passenger compartment.
5. If the fuse is open
sA, replace it with a new
fuse
sB.
6. If a new fuse also opens, have the electrical
system checked and repaired by a NISSAN
dealer.
Fusible links
If the electrical equipment does not operate and
fuses are in good condition, check the fusible
links. If any of these fusible links are melted,
replace with only genuine NISSAN parts.
LDI0444WDI0452
Maintenance and do-it-yourself8-25
ZREVIEW COPYÐ2006 Truck/Frontier(d22)
Owners ManualÐUSA_English(nna)
10/17/05Ðdebbie
X

HEADLIGHTS
The headlight is a semi-sealed beam type which
uses a replaceable headlight (halogen) bulb. A
bulb can be replaced from inside the engine
compartment without removing the headlight as-
sembly.
CAUTION
cHigh pressure halogen gas is sealed
inside the halogen bulb. The bulb may
break if the glass envelope is scratched
or the bulb is dropped.
cWhen handling the bulb, do not touch
the glass envelope.
cDO NOT TOUCH THE BULB
cUse the same number and wattage as
originally installed:
Wattage 65/55Bulb No. HB5/9007*
*: Always check with the Parts Depart-
ment at a NISSAN dealer for the latest
parts information.
cDo not leave the bulb out of the head-
light reflector for a long period of time
as dust, moisture and smoke may enter
the headlight body and affect the per-
formance of the headlight.cAiming is not necessary after replacing
the bulb. When aiming adjustment is
necessary, contact a NISSAN dealer.
Removing the headlight bulb
1. Open the hood.
2. Disconnect the negative (-) battery cable.
3. Disconnect the electrical connector from the
rear end of the bulb.
LDI0446
LIGHTS
8-28Maintenance and do-it-yourself
ZREVIEW COPYÐ2006 Truck/Frontier(d22)
Owners ManualÐUSA_English(nna)
10/17/05Ðdebbie
X