1996 TOYOTA TACOMA check engine

50
(a) Brake System Warning Light This light has the following functions: Parking brake reminder
If this light is on, make sure the parking
brake is fully released. The light should go
off.
Low brake fluid level warning
If this light comes on and stays on while
you are driving, slow down and pull off the
road. Then stop the vehicle carefully.There may be a problem somewhere in
the brake system. Check the fluid level of
the see-through reservoir.
To make sure the parking brake has not
caused the warning light to come on,
check to see that the parking brake is fully
released.
If the brake fluid level is low...
At a safe place, test your brakes by start-
ing and stopping. If you judge that the brakes still work
adequately, drive cautiously to yournearest dealer or shop for repairs.
If the brakes are not working, have the
vehicle towed in for repairs. (For tow- ing information, see Part 4.)
It is dangerous to continue driving
normally when the brake fluid level
is low. CAUTION
! If the brake fluid level is correct...
Have the warning system checked by
your Toyota dealer.
(b) Seat Belt Reminder Light and
Buzzer
Once the ignition key is turned to ONº or
STARTº, the reminder light and buzzer
come on if the driver's seat belt is not fas-
tened. Unless the driver fastens the belt, the light stays on and the buzzer sounds for about 4 to 8 seconds.
(c) Discharge Warning Light
This light warns that the battery is being discharged.
If it comes on while you are driving, there
is a problem somewhere in the charging system.
The engine ignition will continue to oper-
ate, however, until the battery is dischar-
ged. Turn off the air conditioning, blower,
radio, etc., and drive directly to the near-
est Toyota dealer or repair shop.
NOTICE
Do not continue driving if the engine drive belt is broken or loose.

51
(d) Low Oil Pressure Warning Light
This light warns that the engine oil pres-
sure is too low.
If it flickers or stays on while you are driving,
pull off the road to a safe place and stop the
engine immediately. Call a Toyota dealer or
qualified repair shop for assistance.
The light may occasionally flicker when
the engine is idling or it may come on brief-
ly after a hard stop. There is no cause for concern if it then goes out when the en-
gine is accelerated slightly.
The light may come on when the oil level
is extremely low. It is not designed to indi- cate low oil level, and the oil level must bechecked using the level dipstick.
NOTICE
Do not drive the vehicle with the warning light onÐeven for one
block. It may ruin the engine.
(e) Low Fuel Level Warning Light
This light comes on when the fuel level in
the tank becomes nearly empty. Fill up the
tank as soon as possible. (f) Malfunction Indicator Lamp
This lamp comes on in the following cases.
a. The fuel tank is completely empty. (See Fuel gaugeº in Chapter 1-5 for instruc- tions.)
b. The fuel tank cap is not tightened se-
curely. (See Fuel tank capº in Chapter
1-2 for instructions.)
c. There is a problem somewhere in your
engine or automatic transmission electri- cal system.
If it comes on while you are driving in case
c, have your vehicle checked/repaired by
your Toyota dealer as soon as possible.
(g) ABSº Warning Light
This light warns that there is a problem
somewhere in your anti-lock brake sys-tem.
If the light comes on while you are driving,
have your vehicle checked by your T
oyota
dealer as soon as possible.
The light will come on when the ignition key is turned to the ONº position. After
about 3 seconds, the light will go off. When the ABSº warning light is on (and
the brake system warning light is off), thebrake system operates conventionally but
without anti-lock function. Vehicles with rear differential lock systemÐ
The anti-lock brake system does not op-
erate when the rear differential is locked.
It is normal operation for the ABSº warn-
ing light to be on at this time.
(h) SRS Airbag Warning Light
This light will come on when the igni-
tion
key is turned to the ACCº or ONº
position. After about 6 seconds, the
light will go off. This means the airbag
system is operating properly.
The warning light system monitors the air-
bag sensor assembly, inflator, warning light, interconnecting wiring and powersources.
If either of the following conditions occurs, this indicates a malfunction somewhere inthe parts monitored by the warning light
system. Contact your Toyota dealer as
soon as possible to service the vehicle. The light does not come on when the
ignition key is turned to the ACCº or
ONº position or remains on.
The light comes on while driving.
(i) Light Reminder Buzzer
This buzzer will sound if the driver's door is opened while the ignition switch is turned to the LOCKº position with the
headlight switch on. Removing the key will
not stop the buzzer as long as the head-light switch is on.

52(j) Key Reminder Buzzer
This buzzer reminds you to remove the
key when you open the driver's door withthe ignition key in the ACCº or LOCKº position.
(k) Unengaged Parkº Warning Light
(vehicles with automatic transmis-sion)
This light warns that the transmission
Parkº mechanism is not engaged. If the
front drive control lever is in the Nº posi-
tion while the selector lever is in the Pº
position, the transmission will disengage
and the wheels will not lock.
To restore the park function, shift
the front drive control lever out of Nº.
CAUTION
!
(l) Automatic Transmission Fluid
Temperature Warning Light
This light warns that the automatic trans- mission fluid temperature is too high.
If this light comes on while you are driving,
slow down and pull off the road. Stop the
vehicle at a safe place and put the selector
lever in Pº. With the engine idling, wait
until the light goes off. If the light goes off,
you may start the vehicle again. If the light
does not go off, call a Toyota dealer or
qualified repair shop for assistance. (m) Low Windshield Washer Fluid
Level Warning Light (Canada)
The light warns that the windshield wash-
er fluid level is too low. Add washer fluid at
your earliest opportunity. (For instruc-
tions, see Adding washer fluidº in Chap- ter 7-3.)
CHECKING SERVICE REMINDER
INDI-
CATORS (except the low fuel level
warning light)
1. Apply the parking brake.
2. Turn ignition key to ACCº.
The SRS airbag warning light should
come on. It goes off after about 6 sec- onds.
3. Turn the ignition key to ONº, but do not
start the engine.
All the service reminder indicators except
the SRS airbag warning light should come
on. The ABSº warning light goes off after
about 3 seconds.
If any service reminder indicator or warn-
ing buzzer does not function as described above, either the bulb is burned out or the
circuit is in need of repair. Have it checked
by your Toyota dealer as soon as pos- sible.

72
Do not lock the differential until
the wheels have stopped spin-
ning. Otherwise, the vehicle may
move in an unexpected direction
when the differential lock is en-
gaged, resulting in an accident.
This may also lead to possible
damage to differential lock com-
ponent parts.
Do not drive over 8 km/h (5 mph)
when the differential is locked. CAUTION
!
To unlock the differential, push the
switch once again.
Unlock the differential as soon as the ve- hicle moves out.
For easy unlocking, slightly turn the steer-
ing wheel in either direction while the ve- hicle is in motion.
When the differential lock is disengaged, the indicator light will go out.
The differential will also unlock if you shift
the front drive control lever out of L4º. Never f orget to turn off the switch after us-
ing this feature. To check the indicator bulb, turn the igni-
tion key to the ONº position, but do not
start the engine.
Do not keep driving with the differ- ential lock switch on.
CAUTION
!
When parking, firmly apply the parking
brake to avoid inadvertent creeping.
To set: Pull out on the lever.
To release: Press the lock release button,
turn the lever, and push it in.
For better holding power, first depress the brake pedal and hold it while setting the
parking brake.
To remind you that the parking brake is
set,
the parking brake reminder light in the
instrument panel remains on until you re- lease the parking brake. Parking brake

74
SETTING AT A DESIRED SPEED
On vehicles with automatic transmission,
the transmission must be in Dº beforeyou set the cruise control speed.
Bring your vehicle to the desired speed, push the lever down in the SET/COASTº
direction and release it. This sets the ve-
hicle at that speed. If the speed is not sat-
isfactory, tap the lever up for a faster
speed, or tap it down for a slower speed.
Each tap changes the set speed by 1.6
km/h (1.0 mph). You can now take your
foot off the accelerator pedal. If you need accelerationÐfor example,
when passingÐdepress the accelerator
pedal
enough for the vehicle to exceed the
set speed. When you release it, the ve-
hicle will return to the speed set prior to the
acceleration.
For manual transmission:
While driving with the cruise control
on, do not shift to neutral without
depressing the clutch pedal, as this
may cause engine racing or overrev-ving. CAUTION
!
CANCELLING THE PRESET SPEED
You can cancel the preset speed by:
a. Pulling the lever in the CANCELº di- rection and releasing it.
b. Depressing the brake pedal
c. Depressing the clutch pedal (manual transmission)
If the vehicle speed falls below about 40
km/h (25 mph), the preset speed will auto-
matically cancel out.
If the vehicle speed drops 16 km/h (10 mph) below the preset speed, the presetspeed will also automatically cancel out. If the preset speed automatically cancels
out other than for the above cases, have your
vehicle checked by your Toyota deal-
er at the earliest opportunity.
RESETTING AT A FASTER SPEED Push the lever up in the RES/ACCº direc-
tion and hold it. Release the lever when
the desired speed is attained. While the
lever is held up, the vehicle will graduallygain speed.
However, a faster way to reset is to accel-
erate the vehicle and then push the lever down in the SET/COASTº direction.
RESETTING AT A SLOWER SPEED Push the lever down in the SET/COASTº
direction and hold it. Release the lever
when the desired speed is attained. While
the lever is held down, the vehicle speedwill gradually decrease.
However, a faster way to reset is to de- press the brake pedal and then push the
lever down in the SET/COASTº direction.
On vehicles with automatic transmission,
even if you turn off the overdrive switchwith the cruise control on, engine braking
will not be applied because the cruise con-
trol is not cancelled. To decrease the ve-
hicle speed, reset to a slower speed with
the cruise control lever or depress the brake pedal. If you use the brake pedal,cruise control is cancelled.

100
The three-way catalytic converter is
an emission control device installed in
the exhaust system.
The purpose is to reduce pollutants in the exhaust gas.
CAUTION!
Keep people and combustible ma- terials away from the exhaust pipe
while the engine is running. The
exhaust gas is very hot.
Do not drive, idle or park your ve-
hicle over anything that might
burn easily such as grass, leaves, paper or rags.
A large amount of unburned gases
flowing into the three-way catalytic
converter may cause it to overheat and create a fire hazard. To preventthis and other damage, observe the following precautions:
Use only unleaded gasoline.
Do not drive with an extremely lowfuel level; running out of fuelcould cause the engine to misfire,
creating an excessive load on the
three-way catalytic converter.
Do not allow the engine to run atidle speed for more than 20 min- utes.
Avoid racing the engine.
Do not push-start or pull-start
your vehicle.
Do not turn off the ignition whilethe vehicle is moving.
NOTICEKeep your engine in good running
order. Malfunctions in the engine
electrical system, electronic igni-
tion system/distributor ignitionsystem or fuel systems could
cause an extremely high three-way catalytic converter tempera-ture.
If the engine becomes difficult to
start or stalls frequently, take your
vehicle in for a check-up as soon
as possible. Remember, your To- yota dealer knows your vehicleand its three-way catalytic con-
verter system best.
To ensure that the three-way cata-lytic converter and the entire
emission control system operateproperly, your vehicle must re-ceive the periodic inspections re-
quired by the Toyota Maintenance
Schedule. For scheduled mainte- nance information, refer to the
separate Owner's Manual Sup-plement/Maintenance Scheduleº.
Three-way catalytic converter

101
CAUTION!
Avoid inhaling the engine ex-
haust. It contains carbon monox-
ide, which is a colorless and odor-
less gas. It can cause uncon-
sciousness or even death.
Make sure the exhaust system has
no holes or loose connections. The system should be checked
from time to time. If you hit some-
thing, or notice a change in the
sound of the exhaust, have the
system checked immediately.
Do not run the engine in a garage
or enclosed area except for the
time needed to drive the vehicle in
or out. The exhaust gases cannot
escape, making this a particularlydangerous situation.
Do not remain for a long time in a
parked vehicle with the engine
running. If it is unavoidable, how-
ever, do so only in an unconfined
area and adjust the heating or
cooling system to force outside air into the vehicle.To allow proper operation of your
vehicle's ventilation system, keep
the inlet grilles in front of the wind-
shield clear of snow, leaves, or oth-
er obstructions.
If you smell exhaust fumes in the
vehicle, drive with the windows
open. Have the cause immediately located and corrected.
Toyota does not recommend occu- pying the rear cargo area when it is
fitted with a slide-in camper,
camper shell or other type cover
while the engine is running. This
caution applies to both driving and
stopped or parked situations with
the engine running. Particular care
should be t aken to prevent exhaust
gases from entering camper bod-
ies, trailers or other enclosures on
or around your vehicle. If exhaust
fumes are detected, open all win-
dows and thoroughly ventilate the area. FUNCTIONS OF ENGINE OIL
Engine oil has the primary functions of lu-
bricating and cooling the inside of the en-
gine,
and plays a major role in maintaining
the engine in proper working order. ENGINE OIL CONSUMPTION
It is normal that an engine should con-
sume some engine oil during normal
engine operation. The causes of oil
consumption in a normal engine are
as follows. Oil is used to lubricate pistons, piston
rings and cylinders. A thin film of oil is left
on the cylinder wall when a piston
moves downwards in the cylinder. High
negative pressure generated when the
vehicle is decelerating sucks some of
this oil into the combustion chamber.
This oil as well as some part of the oil
film left on the cylinder wall is burned by
the high temperature combustion gases
during the combustion process.
Oil is also used to lubricate the stems
of the intake valves. Some of this oil is
sucked into the combustion chamber
together with the intake air and is
burned along with the fuel. High tem-perature exhaust gases also burn the
oil used to lubricate the exhaust valvestems.
Facts about engine oilconsumption
Engine exhaust cautions

102The amount of engine oil consumed
depends on
the viscosity of the oil, the
quality of the oil and the conditions
the vehicle is driven under.
More oil is consumed by high-speed driv-
ing and frequent acceleration and decel- eration.
A new engine consumes more oil, since
its pistons, piston rings and cylinder walls
have not become conditioned.
When judging the amount of oil con-
sumption, note that the oil may be- come diluted and make it difficult to
judge the true level accurately.
As an example, if a vehicle is used for re-
peated short trips, and consumes a nor- mal amount of oil, the dipstick may not
show any drop in the oil level at all, even
after 1000 km (600 miles) or more. This is
because the oil is gradually becoming di-
luted with the fuel or moisture, making it
appear that the oil level has not changed.
The diluting ingredients evaporate out
when the vehicle is then driven at high
speeds, as on an expressway, making it appear that oil is excessively consumed
after driving as high speeds. IMPORTANCE OF ENGINE OIL LEVEL CHECK
One of the most important points in proper vehicle maintenance is to keep the engine
oil at the optimum level so that oil function
will
not be impaired. Therefore, it is essen-
tial that the oil level be checked regularly.
Toyota recommends that the oil level be checked every time you refuel the vehicle.
Failure to check the oil level
regularly could lead to serious
engine trouble due to insufficient oil.
NOTICE
For detailed information on the oil level
check, see Checking the engine oil levelº
in Chapter 7-2.
Your engine is fitted with twin ground electrode spark plugs.
Use only twin ground electrode
spark plugs for your engine perfor-
mance.
NOTICE
Twin ground electrode spark plugs (5VZ-FE engine)