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4RUNNER (1998)
(k) Key Reminder Buzzer
This buzzer reminds you to remove
the key when you open the driver's
door with the ignition key in the ºACCº
or ºLOCKº position.
(l) Unengaged ºParkº Warning
Light
( vehicles with automatic
transmission)
This light warns that the transmission
ºParkº mechanism is not engaged. If
the front drive control lever is in the
ºNº position while the selector lever is
in the ºPº position, the transmission
will disengage and the wheels will not
lock.
CAUTION
To restore the park function, shift
the front drive control lever out
of ºNº, or the vehicle can move.
(m) Automatic Transmission Fluid Temperature Warning Light
This light warns that the automatic
transmission 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 ºPº. 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 as-
sistance.
NOTICE
Continued driving with the warn- ing light on may damage the auto-matic transmission.
(n) Low windshield Washer Fluid Level Warning Light (Canada)
The light warns that the windshield
washer fluid level is too low. Add
washer fluid at your earliest opportuni-
ty. (For instructions, see ºAdding
washer fluidº in Chapter 7- 3.) CHECKING SERVICE REMINDER
INDICATORS
1. Apply the parking brake.
2. Open one of the side doors or the back door.
The open door warning light should
come on.
3. Close the door. The open door warning light should
go off.
4. Turn the ignition key to ºACCº. The SRS airbag warning light
should come on. It goes off after
about 6 seconds.
5. Turn the ignition key to ºONº, but do not start the engine.
All the service reminder indicators
except the open door warning light
and SRS airbag warning light
should come on. The ºABSº warn-
ing light goes off after about 3 se-
conds.
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4RUNNER (1998)
If any service reminder indicator or
warning 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 Toyo-
ta dealer as soon as possible.
Page 157 of 350

4RUNNER (1998)
To lock the rear differential, push
the switch.
Be sure to stop the wheels before
locking the differential.
Vehicles with manual transmis-
sion'For easy locking, depress the
clutch pedal, push the lock switch and
slowly release the clutch pedal.
The indicator light will blink when the
switch is turned on. Wait a few se-
conds for the system to complete op-
eration. After the differential is locked,
the light will stop blinking and remain on. The anti- lock brake system does not
operate when the rear differential is
locked. It is normal operation for the
ºABSº warning light to be on at this
time.CAUTION
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 engaged, resulting in an
accident. This may also lead to
possible damage to differential
lock component parts.
Do not drive over 8 km/h (5
mph) when the differential is
locked.
To unlock the differential, push the
switch once again.
Unlock the differential as soon as the
vehicle moves out.
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4RUNNER (1998)
Your engine is fitted with twin
ground electrode spark plugs.
NOTICE
Use only twin ground electrode
spark plugs for your engine per-formance.
Brake system
TANDEM MASTER CYLINDER
BRAKE SYSTEM
The tandem master cylinder brake
system is a hydraulic system with two
separate sub- systems. If either sub-
system s hould fail, the other will still
work. However, the pedal will be hard-
er to press, and your stopping dis-
tance will be longer. Also, the brake
system warning light may come on.
CAUTION
Do not drive your vehicle with
only a single brake system. Have
your brakes fixed immediately.
BRAKE BOOSTER The brake booster uses engine vacu-
um to power- assist the brakes. If the
engine should quit while you are driv-
ing, you can bring the vehicle to a
stop with normal pedal pressure.
There is enough reserve vacuum for
one or two stopsÐbut no more!
CAUTION
Do not pump the brake pedal if
the engine stalls. Each push on
the pedal uses up your vacuum
reserve.
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