engine overheat TOYOTA HIGHLANDER 2001 Service User Guide

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2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)

Towing a trailer.
NOTICE

Do not remove the thermostat in
the engine cooling system as this
may cause the engine to overheat.
The thermostat is designed to con-
trol the flow of coolant to keep the
temperature of the engine within
the specified operating range.

Do not continue driving with an
overheated engine. See If your ve-
hicle overheatsº on page 336 in
Section 4.
The tachometer indicates engine speed
in thousands of rpm (revolutions per
minute). Use it while driving to select
correct shift points and to prevent en-
gine lugging and over- revving.
Driving with the engine running too fast
causes excessive engine wear and poor
fuel economy. Remember, in most cases
the slower the engine speed, the greater
the fuel economy.
NOTICE
Do not let the indicator needle get
into the red zone. This may cause
severe engine damage.
This meter displays the odometer and
two trip meters.
1. OdometerÐShows the total distance
the vehicle has been driven.
2. Two trip metersÐShow two different
distances independently driven since
the last time each trip meter was set
to zero.
You can use one trip meter to calculate
the fuel economy and the other to
measure the distance on each trip. All
trip meter data is cancelled if the elec-
trical power source is disconnected.
Tachometer Odometer and two trip meters

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2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
Shift into the Lº position. The trans-
mission will downshift to first gear
when the vehicle speed drops down to
or lower than the following speed, and
maximum engine braking will be en-
abled.
Two- wheel drive models
45 km/h (28 mph) . . . . . . . . . . . . . . . .
Four- wheel drive models
46 km/h (28 mph) . . . . . . . . . . . . . . . .
When the cruise control is being used,
even if you downshift the transmission by
pushing and releasing the overdrive
switch, engine braking is not enabled be-
cause the cruise control is not cancelled.
For ways to decrease the vehicle speed,
see Cruise controlº on page 165 in this
Section.
CAUTION
Be careful when downshifting on a
slippery surface. Abrupt shifting
could cause the vehicle to spin or
skid.
(e) Using 2º and Lº positions
The 2º and Lº positions are used for
strong engine braking as described pre-
viously.
With the selector lever in 2º or Lº, you
can start the vehicle in motion as with the
lever in Dº.
With the selector lever in 2º, the vehicle
will start in first gear and automatically
shift to second gear.
With the selector lever in Lº, the trans-
mission is engaged in first gear.
NOTICE

Be careful not to over- rev the en-
gine. Watch the tachometer to keep
engine rpm from going into the red
zone. The approximate maximum al-
lowable speed for each position is
given below for your reference:
Two- wheel drive models
2º 123 km/h (76 mph). . . . . . . . .
Lº 69 km/h (43 mph). . . . . . . . . .
Four- wheel drive models
 2 º 111 k m / h ( 6 9 m p h ). . . . . . . . .
Lº 62 km/h (38 mph). . . . . . . . . .

Do not continue hill climbing or
hard towing for a long time in the
2º or Lº position. This may cause
severe automatic transmission dam-
age from overheating. To prevent
such damage, Dº position should
be used in hill climbing or hard
towing.
(f) Backing up
1. Bring the vehicle to a complete stop.
2. With the brake pedal held down with
your foot, shift the selector lever to the
Rº position.
NOTICE
Never shift into reverse while the ve-
hicle is moving.
(g) Parking
1. Bring the vehicle to a complete stop.
2. With the brake pedal pressed down,
fully depress the parking brake pedal
to apply the parking brake securely.
3. With the brake pedal pressed down,
shift the selector lever to the Pº posi-
tion.

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2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
CAUTION
Never attempt to move the selector
lever into Pº position under any cir-
cumstances while the vehicle is mov-
ing. Serious mechanical damage and
loss of vehicle control may result.
(h) Good driving practice
If the transmission repeatedly shifts up
and down between third gear and over-
drive when climbing a gentle slope, the
overdrive switch should be turned off.
Be sure to turn the switch on immedi-
ately afterward.
When towing a trailer, in order to main-
tain engine braking efficiency, do not
use overdrive.
CAUTION
Always keep your foot on the brake
pedal while stopped with the engine
running. This prevents the vehicle
from creeping.
NOTICE
Always use the brake pedal or the
parking brake to hold the vehicle on
an upgrade. Do not attempt to hold
the vehicle using the accelerator ped-
al, as this can cause the transmission
to overheat.
(i) Driving in snow mode
Use this mode when starting your vehicle
in ice or snow.
To set the driving pattern to the snow
mode, push the switch. The ECT SNOWº
indicator on the instrument cluster is on.
To cancel the snow mode, push the switch
again.
If the engine is turned off with the snow
mode is on, the snow mode is cancelled
when the engine is restarted.

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Shift into the Lº position. The trans-
mission will downshift to first gear
when the vehicle speed drops down to
or lower than 39 km/h (24 mph), and
maximum engine braking will be en-
abled.
When the cruise control is being used,
even if you downshift the transmission by
pushing and releasing the overdrive
switch, engine braking is not enabled be-
cause the cruise control is not cancelled.
For ways to decrease the vehicle speed,
see Cruise controlº on page 165 in this
Section.
CAUTION
Be careful when downshifting on a
slippery surface. Abrupt shifting
could cause the vehicle to spin or
skid.
(e) Using 3º, 2º and Lº positions
The 3º, 2º and Lº positions are used for
strong engine braking as described pre-
viously.
With the selector lever in 3º, 2º or Lº,
you can start the vehicle in motion as
with the lever in Dº.With the selector lever in 3º or 2º, the
vehicle will start in first gear and automat-
ically shift to third gear or second gear.
With the selector lever in Lº, the trans-
mission is engaged in first gear.
NOTICE

Be careful not to over- rev the en-
gine. Watch the tachometer to keep
engine rpm from going into the red
zone. The approximate maximum al-
lowable speed for each position is
given below for your reference:
3º 144 km/h (90 mph). . . . . . . . . . .
2º 92 km/h (58 mph). . . . . . . . . . . .
Lº 51 km/h (32 mph). . . . . . . . . . . .

Do not continue hill climbing or
hard towing for a long time in the
3º, 2º or Lº position. This may
cause severe automatic transmis-
sion damage from overheating. To
prevent such damage, Dº position
should be used in hill climbing or
hard towing.
(f) Backing up
1. Bring the vehicle to a complete stop.
2. With the brake pedal held down with
your foot, shift the selector lever to the
Rº position.
NOTICE
Never shift into reverse while the ve-
hicle is moving.
(g) Parking
1. Bring the vehicle to a complete stop.
2. With the brake pedal pressed down,
fully depress the parking brake pedal
to apply the parking brake securely.
3. With the brake pedal pressed down,
shift the selector lever to the Pº posi-
tion.
CAUTION
Never attempt to move the selector
lever into Pº position under any cir-
cumstances while the vehicle is mov-
ing. Serious mechanical damage and
loss of vehicle control may result.

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2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
(h) Good driving practice
If the transmission repeatedly shifts up
and down between fourth gear and
overdrive when climbing a gentle slope,
the overdrive switch should be turned
off. Be sure to turn the switch on im-
mediately afterward.
When towing a trailer, in order to main-
tain engine braking efficiency, do not
use overdrive.
CAUTION
Always keep your foot on the brake
pedal while stopped with the engine
running. This prevents the vehicle
from creeping.
NOTICE
Always use the brake pedal or the
parking brake to hold the vehicle on
an upgrade. Do not attempt to hold
the vehicle using the accelerator ped-
al, as this can cause the transmission
to overheat.
(i) Driving in snow mode
Use this mode when starting your vehicle
in ice or snow.
To set the driving pattern to the snow
mode, push the switch. The ECT SNOWº
indicator on the instrument cluster is on.
To cancel the snow mode, push the switch
again.
If the engine is turned off with the snow
mode is on, the snow mode is cancelled
when the engine is restarted.(j) If you cannot shift the selector le-
ver out of Pº position
If you cannot shift the selector lever from
the Pº position even though the brake
pedal is depressed, use the shift lock
override button. For instructions, see If
you cannot shift automatic transmission
selector leverº on page 354 in Section 4.

'05 HIGHLANDER_U (L/O 0409)
2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
Publication No. OM48570U
Part No. 01999-48570
Printed in Japan 01- 0411- 00
Quick index

If a service reminder indicator or warning buzzer comes on 135. . . . . . . .

If your vehicle will not start 332. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

If your engine stalls while driving 335. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

If your vehicle overheats 336. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

If you have a flat tire 337. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

If your vehicle needs to be towed 349. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tips for driving during break- in period 291. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How to start the engine 318. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General maintenance 367. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Complete index NO TAG. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas station information
Fuel type:
2AZ- FE engine: UNLEADED gasoline, Octane Rating 87
(Research Octane Number 91) or higher
3MZ- FE engine: UNLEADED gasoline, Octane Rating 87
(Research Octane Number 91) or higher
For improved vehicle performance, the use of premium unleaded
gasoline with an Octane Rating of 91 (Research Octane Number 96)
or higher is recommended.
See page 291 for detailed information.
Fuel tank capacity:
72.5 L (19.1 gal., 16.0 Imp.gal.)
Engine oil:
API grade SL Energy- Conservingº or ILSAC multigrade engine oil is
recommended.
See page 381 for detailed information.
Tire information: See pages 385 through 393.
Tire inflation pressure: See page 410.
U-8
C

010QN-01
D32092
INCORRECT
INCORRECT
CORRECT
D25087
Looseness of Crimping
Core Wire
Terminal
Deformation
Pull Lightly 01-36
- INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
36 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ELECTRONIC CIRCUIT INSPECTION PROCEDURE
1. BASIC INSPECTION
(a) RESISTANCE MEASURING CONDITION OF ELECTRONIC PARTS
(1) Unless stated, all resistance is measured at an ambient temperature of 20C (68F). Resis-
tances measured may be outside the specifications if measured at high temperatures, i.e. im-
mediately after the vehicle has been running. Measurements should be made after the engine
has cooled down.
(b) HANDLING CONNECTORS
(1) When disconnecting a connector, first squeeze the
mating halves tightly together to release the lock,
then press the lock claw and separate the connec-
tor.
(2) When disconnecting a connector, do not pull on the
harnesses. Grasp the connector directly and sepa-
rate it.
(3) Before connecting the connector, check that there
are no deformed, damaged, loose or missing termi-
nals.
(4) When connecting a connector, press firmly until you
hear the lock close with a ºclickº sound.
(5) If checking the connector with a TOYOTA electrical
tester, check it from the backside (harness side) of
the connector using a mini test lead.
NOTICE:

As a waterproof connector cannot be checked from
the backside, check by connecting a sub-harness.

Do not damage the terminals by moving the inserted
tester needle.
(c) CHECKING CONNECTORS
(1) Checking when the connector is connected:
Squeeze the connector together to confirm that it is
fully inserted and locked.
(2) Checking when the connector is disconnected:
Check by pulling the wire harness lightly from the
backside of the connector. Look for unlatched termi-
nals, missing terminals, loose crimps or broken con-
ductor wires.
Check visually for corrosion, metallic or foreign ob-
jects and water; and bent, rusted, overheated, con-
taminated, and deformed terminals.
NOTICE:
When testing a gold-plated female terminal, always use a
gold-plated male terminal.