2001 TOYOTA HIGHLANDER trailer

'05 HIGHLANDER_U (L/O 0409)
162
2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
LOW TIRE PRESSURE WARNING LIGHT
This light comes on when the ignition key
is turned to the ONº position. It goes off
after a few seconds. This indicates that
the tire pressure warning system is func-
tioning properly.
If the low tire pressure warning light
comes on or blinks while driving, do
the following.If the warning light comes on:
1. Adjust the tire inflation pressure to
the specified level as soon as pos-
sible. (See Tiresº on page 410 in
Section 8.)
2. Push the tire pressure warning sys-
tem reset switch for a few seconds
and make sure the warning light
goes off.
If the light remains on after the reset
switch has been pushed, have the tire
pressure warning system checked at your
Toyota dealer.
If you have a flat tire, replace it with the
spare tire. For details, see If you have
a flat tireº on page 337 in Section 4.
If the warning light blinks once every
second:
The low tire pressure warning system may
be malfunctioning. Contact your Toyota
dealer.
If the warning light blinks twice every
second:
The low tire pressure warning system
needs to be initialized. Reset the system
with the tire pressure warning system re-
set switch. (To reset the system, see
TIRE PRESSURE WARNING SYSTEM
RESET SWITCHº.)The tire pressure warning system does
not function properly under certain cir-
cumstances. In the following cases, the
low tire pressure warning light may not
come on even if the tire inflation pres-
sure is low, or it may come on when
the tire inflation pressure is actually
normal.
A compact spare tire, snow tires, or
tire chains are used.
The tire inflation pressure is excessive-
ly higher than specified, or tire inflation
pressure suddenly drops due to burst-
ing or other causes.
The vehicle is driven on a slippery
road surface such as rough or frozen
roads.
The vehicle speed is less than 30 km/h
(19 mph) or more than 100 km/h (62
mph), and the driving duration is less
than 5 minutes.
The tires differ in tread pattern or
manufacturer.
The tires are not the specified size.
The tread wear is very different among
the installed tires.
Rapid acceleration/deceleration or
sharp turns is continued.
Towing a trailer.

2005 HIGHLANDER (EWD592U)
152
Trailer Towing
20A TOWING
2F 1
10A TAIL
1H 4
20A STOP
1E 17. 5A
IG1
1E 815A
HAZARD
2B 2
1 2
4L 34L1
4E 8
4E 74C 10
4C 8IL2 20
LH
RH
3B 9
3B 8
IA BC BIA2 1 5261410
323 8
2 8356 14
9
124
19 GND LT/S RT/S TL LT RT
GNDLR LL HAZ EL ERIG B
TAIL +B STP
G- R
W
Y
B
G- W V
BR
B
L
L
R
O
W- B W- BW
G W
R
Y W- B
Y
G
B
W Y
W
W- B W- B W- B W- B
G
T10C13T 8 S15
B 9
J12
7E
13 IA2 12
O
LT/S RT/S TLIA2 3 IC3 9IA18
E E
J13B
BJ10
IA2 6
L BR
IC2 8
LG
L
1E 4
1D 14
W- B
4G 10
4M 64C 4
AA
J20
G
T 9
3E 4
8
Hazard
SW
A10HAZ F
R
DD
B 9
W- B
B
R
8
M 3HAZ
(
*1)
(
*2)
* 1 : w/ Navigation System
* 2 : w/o Navigation System From Power Source System (
See Page 62)
Hazard
SWTurn
SW
A/C Control
AssemblyBody ECUCombination SW
Junction
Connector Junction
Connector
Junction
Connector
Junction
Connector
Multi- Display Stop Light SW
Turn Signal Flasher
Towing Converter
Trailer Hitch

9900X-21
99-4
- MAINTENANCEUNDER HOOD
3784 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
UNDER HOOD
GENERAL MAINTENANCE
1. GENERAL NOTES

Maintenance items may vary from country to country. Check the owner's manual supplement in which
the maintenance schedule is shown.

Every service item in the periodic maintenance schedule must be performed.

Periodic maintenance service must be performed according to whichever interval in the periodic main-
tenance schedule occurs first, the odometer reading (miles) or the time interval (months).

Maintenance service after the last period should be performed at the same interval as before unless
noted.

Failure to do even one of the items can cause the engine to run poorly and/or increase the exhaust
emissions.
2. WINDSHIELD WASHER FLUID
(a) Check that there is sufficient fluid in the tank.
3. ENGINE COOLANT LEVEL
(a) Check that the coolant level is between the LEVEL lines on the see-through reservoir at normal tem-
perature (20°C (68°F)).
4. RADIATOR AND HOSES
(a) Check that the front of the radiator is clean and not blocked by leaves, dirt or bugs.
(b) Check the hoses for cracks, kinks, rot or loose connections.
5. BATTERY ELECTROLYTE LEVEL
(a) Check the indicator.
(b) Check that the electrolyte level of all the battery cells is between the upper and lower level lines on
the case.
6. BRAKE FLUID LEVEL
(a) Check that the brake fluid levels are near the upper level line on the see-through reservoirs.
7. ENGINE DRIVE BELT
(a) Check the drive belt for fraying, cracks, wear or oiliness.
8. ENGINE OIL LEVEL
(a) Check the level on the dipstick with the engine turned off.
9. POWER STEERING FLUID LEVEL
(a) Check the level on the dipstick.
(b) The level should be in the ºHOTº or ºCOLDº range depending on the fluid temperature.
10. AUTOMATIC TRANSMISSION FLUID LEVEL
(a) Park the vehicle on a level surface.
(b) With the engine idling and the parking brake applied, shift the selector into all the positions from ºPº
to ºLº, and then shift into the ºPº position.
(c) Pull out the dipstick and wipe off the fluid with a clean shop rag. Re-insert the dipstick and check that
the fluid level is in the ºHOTº range.
(d) Perform this check with the fluid at the normal driving temperature (70 to 80°C, 158 to 176°F).
HINT:
Wait until the engine cools down (approx. 30 min.) before checking the fluid level after extended driving at
high speed, in hot weather, in heavy traffic or after pulling a trailer.
11. EXHAUST SYSTEM
(a) Visually inspect for cracks, holes or loose supports.
If any change in the sound of the exhaust or the smell of the exhaust fumes is noticed, locate and correct
the cause.

2005 HIGHLANDER (EWD592U)
M
1
234
22 HIGHLANDER
2ACC
IG1 AM1 4
140A
ALT 12I
20A TOWI NG
1C 7G
1C 6
3
40A AM1
2F 1
7. 5A IG1
W
B
WW
2
1
Bat tery FL MAIN
3. 0W2
151H
V
81F
15 A SEAT HT R
1A 1
2 1
3 5 11
11
4L 9
4L 7
ICRi g ht Co wl S i de P a nel
BBRi g ht Ce nt e r
Pillar 1BM16 4 7BM1 10 IP14IF1
3K 63K71IF1
5IA2
6 4
BALeft Center
Pillar 3F 13
IBRight Ins tr ument
Panel Br ac e 46 64Power Source Seat Heater Trailer Towing
339IC3
12 IA2
BCLeft Side of
Rear Cr os s Member
Tur n Signal Flas her
<8- 2>
B5261 810439
3124 LL
W
G
G- RG
W- B W- BW- B W- B B R R W- B W- BRRP W-B W-B
W- BW- B W- BWRY L
BR
Y
G
O V G- R
WWTAIL Fu se
<7- 4> St op Light SW
<9- 3>
+B RT LT TAIL STP
GND LT/ S RT/ S TL
GND LT/ S RT/ S TL RH EIG IG
ELH
SEAT HEATER
Re la y
AB
AA
BW- B
BW- B
ST1* 1 : w/ Power Seat (
Front Passenger' s Seat)
* 2 : w/o Power Seat (
Fr ont Pass enger ' s Seat)
AB
AA BA
CB
RB W-B W-B
(
*1)
(
*2)(
*2) (
*1)(
*1)
(
*2)(
*2) (
*1)
BA
CB I15
F 7S 3 S 4
T 9
S25
J21(
A)
, J22(
B) J21(
A)
, J22(
B)
J23(
A)
, J24(
B)
J23(
A)
, J24(
B)
S26
T1 0
J12
Fus ible Link BlockIgnition SW
Junction
Connector
Junction
Connector Junction
Connector
Junct ion
Connect orJunc tion
Connec tor
Seat Heat er
SW LH Seat Heat er
SW RHSeat Heater
LH
Seat Heat er RH Towing Conv er ter
Trailer Hitch

SYSTEM INDEX
M OVERALL ELECTRICAL WIRING DIAGRAM
2005 HIGHLANDER (EWD592U)
348
SYSTEMS LOCATION SYSTEMS LOCATION
Air Conditioning (Automatic A/C) 34-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning (Manual A/C) 35-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio System (6 Speaker) 28-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio System (8 Speaker) 29-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Glare-Resistant EC Mirror 20-2. . . . . . . . . . . . . . . . . . . . . . . .
Automatic Light Control 12-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Back-Up Light 9-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cigarette Lighter 27-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combination Meter 31-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise Control (2AZ-FE) 3-1 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise Control (3MZ-FE) 2-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Lock Control 18-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronically Controlled Transmission and A/T Indicator
(2AZ-FE) 14-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronically Controlled Transmission and A/T Indicator
(3MZ-FE) 13-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Control (2AZ-FE) 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Control (3MZ-FE) 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Immobilizer System 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Deicer 25-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Fog Light 12-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Wiper and Washer 23-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Garage Door Opener 10-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlight (w/ Daytime Running Light) 5-2. . . . . . . . . . . . . . . . . . . . . . . . . .
Headlight (w/o Daytime Running Light) 6-2. . . . . . . . . . . . . . . . . . . . . . . . .
Horn 8-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Illumination 11-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior Light 10-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Key Reminder 26-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Light Auto Turn Off System 26-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mirror Heater 25-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Moon Roof 20-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multiplex Communication System (BEAN Bus) 20-3. . . . . . . . . . . . . . . .
Multiplex Communication System (CAN) 15-10. . . . . . . . . . . . . . . . . . . . .
Navigation System 30-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Outlet (110V) 27-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Outlet (12V) 27-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Seat (Driver's Seat) 21-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Seat (Front Passenger's Seat) 21-3. . . . . . . . . . . . . . . . . . . . . . . .
Power Source 1~36-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Window 17-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radiator Fan and Condenser Fan (2AZ-FE) 33-2. . . . . . . . . . . . . . . . . .
Radiator Fan and Condenser Fan (3MZ-FE) 32-2. . . . . . . . . . . . . . . . . .
Rear Heater 36-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Window Defogger 25-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Wiper and Washer 23-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Control Mirror 24-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat Belt Warning 26-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat Heater 22-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift Lock 24-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SRS 16-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stop Light 9-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillight 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theft Deterrent System 19-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Pressure Warning System 15-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer Towing 22-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal and Hazard Warning Light 8-2. . . . . . . . . . . . . . . . . . . . . . . . . .
VSC 15-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wireless Door Lock Control 18-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

L
CodePart Name Part NumberCodePart Name Part Number
2005 HIGHLANDER (EWD592U)
345
S28Short Connector90980-12366
S29Short Connector90980-12365
S30Short Connector90980-10859
S31Short Connector90980-10860
S32Side Airbag Sensor Rear LH90980-12225S33Side Airbag Sensor Rear RH90980-12225
T 1Theft Deterrent Horn90980-10619
T 3Turbine Speed Sensor90980-1 1156
T 4Theft Deterrent ECU90980-12169
T 5Theft Deterrent Indicator Light90980-12063
T 6TRAC Off SW90980-1 1013
T 7Transponder Key Amplifier90980-12092
T 8Turn Signal Flasher90980-10799
T 9Towing Converter90980-1 1527
T10Trailer Hitch90980-10794
T11Tweeter LH90980-1 1013T12Tweeter RH90980-1 1013
T13Throttle Control Motor90980-1 1858T13Throttle Position Sensor90980-11858
T14Transponder Key Computer90980-1 1911
T15Telltale Light Assembly
Indicator Light Wire Sub Assembly90980-12221T16Transmission Control SW90980-12221
Transmission Shift Main SW
V 2VSV (ACIS No.2)90980-1 1149
V 4VSV (EVAP)90980-1 1156V 5VSV (ACM)90980-11156
V 6VVT Sensor LH90980-10947V 7VVT Sensor RH90980-10947
V 8VSC Warning Buzzer90980-10906
V9Garage Door OpenerV 9Vanity Light LH90980-1 1369
V10Vanity Light RH
V11Vapor Pressure Sensor90980-1 1860
V13Video Terminal90980-12221
V14VSV (Canister Closed Valve)90980-1 1859
V15Voltage Inverter90980-10799
W 1Washer Level Sensor90980-1 1068
W 3Water Temp. SW No.190980-1 1235
W 4Water Temp. SW No.290980-1 1243
W 5Wireless Door Lock Buzzer90980-1 1142
W 6Wireless Door Lock ECU90980-1 1909
Y 1Yaw Rate Sensor90980-1 1904

2005 HIGHLANDER (EWD592U)
45
G
Position of Parts in Body
R 7 Rear Combination Light LH
R 8 Rear Combination Light RH
R 9 Rear Door Speaker LH
R 10 Rear Door Speaker RH
R 11 Rear Interior Light
R 12 Rear Interior Light SW
R 13 Rear Power Outlet
R 14 Rear Side Marker Light LH
R 15 Rear Side Marker Light RH
R 16 Rear Window Defogger
R 17 Rear Window Defogger
R 18 Rear Wiper Motor
R 19 Remote Control Mirror LH
R 20 Remote Control Mirror RH
R 25 Rear Heater Blower Motor
R 26 Rear Heater Blower SW
R 27 Rear Heater Relay
R 28 Rear Seat Entertainment Display
R 29 Rear Seat Entertainment ECU
R 30 Rear Seat Entertainment ECU
R 31 Rear Seat Entertainment ECUS 16 Side Airbag Sensor Front LH
S 17 Side Airbag Sensor Front RH
S 20 Sliding Roof Control ECU
S 22 Stereo Power Amplifier
S 23 Stereo Power Amplifier
S 32 Side Airbag Sensor Rear LH
S 33 Side Airbag Sensor Rear RH
T 9 Towing Converter
T 10 Trailer Hitch
T 11 Tweeter LH
T 12 Tweeter RH
V 9 Garage Door Opener
Vanity Light LH
V 10 Vanity Light RH
V 11 Vapor Pressure Sensor
V 13 Video Terminal
V 14 VSV (Canister Closed Valve)
V 15 Voltage Inverter
W 6 Wireless Door Lock ECU
Y 1 Yaw Rate Sensor

2005 HIGHLANDER (EWD592U)
326
J POWER SOURCE (Current Flow Chart)
FuseSystemPage
10ADOME
Key Reminder and Seat Belt Warning
Navigation System
Theft Deterrent System
VSC and Tire Pressure Warning System
Wireless Door Lock Control226
266
208
180
200
10AH-LP LH UPRHeadlight (w/ Daytime Running Light)
Headlight (w/o Daytime Running Light)11 8
122
10AH-LP RH UPRHeadlight (w/ Daytime Running Light)
Headlight (w/o Daytime Running Light)11 8
122
10AHORNHorn
Theft Deterrent System242
208
15AHAZARDTrailer Towing
Turn Signal and Hazard Warning Light152
130
15ASECURITYTheft Deterrent System208
20AEFI NO.1
Cruise Control (2AZ-FE)
Cruise Control (3MZ-FE)
Electronically Controlled Transmission and A/T Indicator (2AZ-FE)
Electronically Controlled Transmission and A/T Indicator (3MZ-FE)
Engine Control (2AZ-FE)
Engine Control (3MZ-FE)172
164
11 0
102
88
74
20APOWER OUTLET2Power Outlet246
20ATOWINGTrailer Towing152
25ADOOR LOCK
Door Lock Control
Theft Deterrent System
Wireless Door Lock Control194
208
200
25ARAD NO.1Audio System (6 Speaker)
Audio System (8 Speaker)280
272
40AMAIN
Automatic Light Control
Headlight (w/ Daytime Running Light)
Headlight (w/o Daytime Running Light)
Light Auto Turn Off System
Theft Deterrent System146
11 8
122
148
208
instrument Panel J/B (See Page 28)
FuseSystemPage
7.5AIG1
Automatic Glare-Resistant EC Mirror
Automatic Light Control
Back-Up Light
Cruise Control (2AZ-FE)
Cruise Control (3MZ-FE)
Door Lock Control
Electronically Controlled Transmission and A/T Indicator (2AZ-FE)
Electronically Controlled Transmission and A/T Indicator (3MZ-FE)
Front Fog Light264
146
134
172
164
194
11 0
102
126
*These are the page numbers of the first page on which the related system is shown.