2002 Acura MDX ignition

The spark plugs in your vehicle are a
special platinum-tipped design f or
longer lif e. The spark plugs should
be replaced according to the time
and distance recommendations in
the maintenance schedule.Loosen the two holding clips by
turning the heads one-quarter turn
counterclockwise with a f lat-tipped
screwdriver. Remove the cover on
the f ront cylinder bank by pulling
it straight up.
Clean up any dirt and oil that have
collected around the ignition coils.
Clean the hood latch assembly with a
mild cleaner, then lubricate it with a
multipurpose grease. Lubricate all
the moving parts (as shown),
including the pivot. Follow the time
and distance recommendations in
the Maintenance Schedule. If you
are not sure how to clean and grease
the latch, contact your Acura dealer. 1.
2.
CONT INUED
Hood L atch
Spark PlugsReplacement
Hood L at ch, Spark Plugs
Maint enance277
L LAA T
TC
CH H A
AS
SSSEEM
M B
BLLYY
H
HO
OL LDD I
INNG G C
CLLIIPP
01/09/07 12:39:30 31S3V610_282

Disconnect the wire connector
f rom the ignition coil by pushing
on the lock tab and pulling on the
connector. Pull on the plastic
connector, not the wires.Remove the spark plug with
a f ive-eighths inch (16 mm) spark
plug socket. Use a wrench to remove the
hexagonsocketheadcapbolt
holding the ignition coil. Remove
the ignition coil by pulling it
straight out.Put the new spark plug into the
socket, then screw it into the hole.
Screw it in by hand so you do not
crossthread it.
3. 4.
5.6.
Maint enance
Spark Plugs
278
H H
E
EX
X A
AG
GO ONN S
SOOC CKKEET
T H
HE
EA
A D
D C
CAA P
P B
BOOL LTT
01/09/07 12:39:40 31S3V610_283

´
µ
Torque the spark plug. (If you do
not have a torque wrench, tighten
the spark plug two-thirds of a turn
af ter it contacts the cylinder head.)
Tightening torque:Spark Plug Gap:
Install the ignition coil. Reinstall
the hexagon socket head cap bolt.
Push the wire connector onto the
ignition coil. Make sure it locks in
place.
Repeat this procedure f or the
other f ive spark plugs.
Reinstall the cover on the front
cylinder bank while putting its
mounting clip in the hole on the
passenger’s side. Secure the cover
by turning the heads of the two
holding clips one-quarter turn
clockwise with a f lat-tipped
screwdriver. NGK:
DENSO:
7. 8.
9.
10.
11. Specif ications:
Spark Plugs
Maint enance279
13 lbf·ft (18 N·m , 1.8 kgf·m)
0.04 in (1.1 mm)
PKJ16CR-L11 PZFR5F-11
0
0.1 mm
Tighten the spark plugs caref ully. A
spark plug that is too loose can
overheat and damage the engine.
Overtightening can cause damage to
the threads in the cylinder head.
01/09/07 12:39:52 31S3V610_284

If you have a f lat tire while driving,
stop in a saf e place to change it.
Stopping in traf f ic or on the shoulder
of a busy road is dangerous. Drive
slowly along the shoulder until you
gettoanexitoranareatostopthat
is far away from the traffic lanes.Turn on the hazard warning lights
and turn the ignition switch to
LOCK (0). Have all the
passengers get out of the vehicle
while you change the tire.
Park the vehicle on f irm, level and
non-slippery ground away f rom
traffic. Put the transmission in
Park. Apply the parking brake.
2.
1.
CONT INUED
Changing a Flat T ire
T aking Care of t he Unexpect ed315
S SP PA
A R
REE T
TI
IRRE E
J
JA
A C
CKK
T
T O
OO OLLSS
The vehicle can easily roll off
the jack, seriously injuring
anyone underneath.
Follow the directions for
changing a tire exactly, and
never get under the vehicle
when it is supported only by the
jack.
01/09/07 12:45:22 31S3V610_320

Diagnosing why your engine won’t
start f alls into two areas, depending
on what you hear when you turn the
key to START (III):You hear nothing, or almost
nothing. The engine’s starter
motor does not operate at all, or
operates very slowly.
You can hear the starter motor
operating normally, or the starter
motor sounds like it is spinning
f aster than normal, but the engine
does not start up and run.
When you turn the ignition switch to
START (III), you do not hear the
normal noise of the engine trying to
start. You may hear a clicking sound
or series of clicks, or nothing at all.
Check these things: Check the transmission interlock.
The transmission must be in Park
orNeutralorthestarterwillnot
operate.
Turn the ignition switch to ON (II).
Turn on the headlights and check
their brightness. If the headlights
are very dim or don’t light at all,
the battery is discharged. See
on page .
Turn the ignition switch to START
(III). If the headlights do not dim,
check the condition of the f uses. If
thefusesareOK,thereisproba-
bly something wrong with the
electrical circuit for the ignition
switch or starter motor. You will
need a qualif ied technician to
determine the problem. (See on page .)If the headlights dim noticeably or
go out when you try to start the
engine, either the battery is dis-
charged or the connections are
corroded. Check the condition of
the battery and terminal connec-
tions (see page ). You can
then try jump starting the vehicle
f rom a booster battery (see page
).
In this case, the starter motor’s
speed sounds normal, or even f aster
than normal, when you turn the
ignition switch to START (III), but
the engine does not run. Are you using the proper starting
procedure? Ref er to on page .
338 280
323
210
323
Nothing Happens or the Starter
Motor Operates Very Slowly Jump Starting
Emergency T owingT he Starter Operates Normally
Starting the
Engine
T aking Care of t he Unexpect ed
If Your Engine Won’t Start
322
01/09/07 12:46:30 31S3V610_327

To jump start your vehicle, f ollow
these directions closely:
If your vehicle’s battery has run
down,youmaybeabletostartthe
engine by using a booster battery.
Although this seems like a simple
procedure, you should take several
precautions.
Put the transmission in Neutral or
Park, and set the parking brake. Open the hood and check the
physical condition of the battery
(see page ). In very cold
weather, check the condition of
the electrolyte. If it seems slushy
or like ice, do not try jump starting
until it thaws.
Turn of f all the electrical acces-
sories: heater, A/C, climate
control, stereo system, lights, etc.
You cannot start your Acura by
pushing or pulling it.
Your vehicle has the Immobilizer
System. You should use a
properly-coded master or valet key
to start the engine (see page ).
A key that is not properly coded
will cause the immobilizer system
indicator in the dash panel to blink
rapidly.
Do you have f uel? Turn the
ignition switch to ON (II) for a
minute and watch the f uel gauge.
The low f uel level warning light
may not be working, so you were
not reminded to f ill the tank.
There may be an electrical
problem, such as no power to the
f uel pump. Check all the f uses
(see page ).
If youfindnothingwrong,youwill
need a qualif ied technician to f ind
the problem. See on page . 1.
2.
338 80
336 280
CONT INUED
Jump Starting
Emergency
Towing
If Your Engine Won’t Start, Jump Starting
T aking Care of t he Unexpect ed323
A battery can explode if you do
not follow the correct procedure,
seriously injuring anyone
nearby.
Keep all sparks, open flames,
and smoking materials away
from the battery. If a battery sits in extreme cold, the
electrolyte inside can f reeze.
Attempting to jump start with a f rozen
battery can cause it to rupture.
01/09/07 12:46:44 31S3V610_328

This indicator should light when the
ignition switch is ON (II), and go out
af ter the engine starts. It should
never come on when the engine is
running. If it starts f lashing, it
indicates that the oil pressure
dropped very low f or a moment, then
recovered. If the indicator stays on
with the engine running, it shows
that the engine has lost oil pressure
and serious engine damage is
possible. In either case, you should
take immediate action.Saf ely pull of f the road and shut
of f the engine. Turn on the hazard
warning indicators.
If necessary, add oil to bring the
level back to the full mark on the
dipstick (see page ). Let the vehicle sit f or a minute.
Open the hood and check the oil
level (see page ). Although oil
levelandoilpressurearenot
directly connected, an engine that
is very low on oil can lose pressure
during cornering and other driving
maneuvers.Start the engine and watch the oil
pressure indicator. If the light
does not go out within ten seconds,
turn of f the engine. There is a
mechanical problem that needs to
be repaired bef ore you can
continue driving. (See
on page .)
1.
2.
3. 4.
338
261
198
L ow Oil Pressure Indicator
T aking Care of t he Unexpect ed
Emergency
Towing
327
L LO OW W O
OIILL P
PR
RE ES
SS SUUR REE I
INND DI
ICCA A T
TO
OR R
Running the engine with low oil
pressure can cause serious mechanical
damage almost immediately. Turn of f
the engine as soon as you can saf ely get
the vehicle stopped.
01/09/07 12:47:27 31S3V610_332

This indicator should come on when
the ignition switch is ON (II), and go
out af ter the engine starts. If it
comes on brightly when the engine
is running, it indicates that the
charging system has stopped
charging the battery.By eliminating as much of the
electrical load as possible, you can
drive several miles (kilometers)
before the battery is too discharged
to keep the engine running. Drive to
a service station or garage where
you can get technical assistance.
Immediately turn of f all electrical
accessories:radio,heater,A/C,
climate control, rear def ogger, cruise
control, etc. Try not to use other
electrically-operated controls such as
the power windows. Keep the engine
running and take extra care not to
stall it. Starting the engine will
discharge the battery rapidly.
T aking Care of t he Unexpect ed
Charging System Indicator
328
C CH
H A
AR
RGGI INNG G S
SYYSSTTE
EM
M I
INND DI
ICCA A T
TO
OR R
01/09/07 12:47:34 31S3V610_333