2001 TOYOTA HIGHLANDER Engine mount

5,000Mile Maintenance Intervals
7,500Mile Maintenance IntervalsTo determine the appropriate maintenance
interval for your vehicle, see page 16.
Dealer Service Verification:
Date:
Mileage:
Dea ler Service Verification:
Maintenance Log: SUVs and Trucks
6Applies to Tacoma with 1GRFE, Tundra with 1GRFE and 4Runner with 1GRFE. Required under the terms of the
Emission Control Warranty.
7 Applies to Highlander with 3MZFE, Land Cruiser, Sequoia, Tundra with 2UZFE and 4Runner with 2UZFE.8Inspect thickness measurement and disc runout.9See p age 37 f or details.
90,000 Miles or 108 Months
qReplace engine oil and oil filter1qReplace engine air filter
qRotate tiresqReplace cabin air filter (if equipped)
qLubricate drive shaft bushing (Land Cruiser)
qLubricate propeller shaft4
qLubricate wheel bearings (Land Cruiser)
qReplace limitedslip differential oil, if equipped5
qReplace spark plugs6
qReplace timing belt7
qRetorque drive shaft bolt (4WD RAV4)
qRetorque propeller shaft bolt (all models except Highlander and RAV4)
qInspect the following:__ Automatic transmission fluid
__ Ball joints and dust covers
__ Brake lines and hoses
__ Brake linings/drums and brake pads/discs
8
__ Drive belts
__ Drive shaft boots3
__ Engine coolant9
__ Ex haust pipes and mountings
__ Front differential oil (4WD models, Highlander and RAV4)
Additional Maintenance Items for Special Operating Conditions2
Driving in desert or on dirt roads:
qTighten nuts and bolts on chassis
Driving while towing:
qRepl ace front differential oil (2WD RAV4 with manual transmission, all 4WD models
e x cept RAV4 with automatic transmission and Highlander)
qR eplace manual transmission oil (RAV4, Tundra)
qReplace rear differential oil, including limited slip (all models except 2WD
Hi ghlander and 2WD RAV4)
qR epl ac e t ran sfer ca se oil (4WD models)
qTighten nuts and bolts on chassis
Dea ler Service Verification:
D at e :
Mileage:
31
__ Fuel lines and connections, fuel tank band and fuel tank vapor vent system hoses
__ Fuel tank cap gasket
__ Manual transmission oil (RAV4, Tundra)
__ Radiator core and condenser
__ Rear differential oil (all models except 2WD Highlander and 2WD RAV4)
__ Steering gear box
__ St eering linkage and boots
__ Transfer case oil (all 4WD models)

Maintenance Log: SUVs and Trucks
5Initial replacement at 100,000 miles/120 months. Replace every 50,000 miles/60 months thereafter. See page 37
f or add itional information.
6See p age 37 for details.
105,000 Miles or 126 Months
qReplace engine oil and oil filter1
qRotate tires
qLubricate propeller shaft4
qRetorque drive shaft bolt (4WD RAV4)
qRetorque propeller shaft bolt (all models except Highlander and RAV4)
qVisually inspect brake linings/drums and brake pads/discs
qIn spect the following:__ Ball joints and dust covers
__ Brake lines and hoses
__ Drive belts
__ Drive shaft boots
3
__ Engine coolant6
__ Exhaust pipes and mountings
__ Front differential oil (all 4WD except
Highlander and RAV4)
Note: Driving in heavy traffic, on dirt roads or in urban, dusty or desert areas may shorten
t h e lif e of the cabin air filter. Replacement may be needed if you notice reduced air flow
from the air conditioner and heater or if the windows fog easily when you use the "Fresh"
mode. Consult your dealer if any of these conditions occur.
Additional Maintenance Items for Special Operating Conditions2
Dr iv ing in desert or on dirt roads:
qInspect engine air filter
qTighten nuts and bolts on chassis
Dr iv ing while towing:
qReplace front differential oil (all 4WD except Highlander and RAV4)
qR epl ace rear differential oil, including limitedslip (all models except 2WD
Hi gh lander, 2WD RAV4, Sequoia and nonlimitedslip Tundra)
qReplace transfer case oil (4WD Highlander, 4WD RAV4)
qTighten nuts and bolts on chassis
Dealer Service Verification:
D ate:
Mileage:
33
__ Radiator core and condenser
__ Rear differential oil (all models except
2WD Highlander and 2WD RAV4)
__ Steering gear box
__ Steering linkage and boots
__ Transfer case oil (4WD Highlander, 4WD RAV4)

Maintenance Log: SUVs and Trucks
6Required under the terms of the Emission Control Warranty.7 Inspect thickness measurement and disc runout.8 Applies to Land Cruiser, Sequoia, Tundra and 4Runner with 2UZFE. Required only for vehicles in California,
Massachusetts and New York.
9See page 37 for details.
120,000 Miles or 144 Months
qReplace engine oil and oil filter1qReplace engine air filter
qRotate tiresqReplace cabin air filter (if equipped)
qLubricate drive shaft bushing (Land Cruiser)
qLubricate propeller shaft4
qLubricate wheel bearings (Land Cruiser)
qReplace limitedslip differential oil, if equipped5
qReplace spark plugs (all models)6
qRetorque drive shaft bolt (4WD RAV4)
qRetorque propeller shaft bolt (all models except Highlander and RAV4)
qInspect the following:__ Automatic transmission fluid
__ Ball joints and dust covers
__ Brake lines and hoses
__ Brake linings/drums and brake pads/discs
7
__ Charcoal canister8
__ Drive belts
__ Drive shaft boots3
__ Engine coolant9
__ E ngine valve clearance (except Tacoma
with 2TRFE)
__ Front differential oil (4WD models, Highlander, RAV4)
Additional Maintenance Items for Special Operating Conditions2
Driv ing in desert or on dirt roads:
qTi gh ten n uts and bolts on c hassis
Driving while towing:
qReplace automatic transmission fluid
qRepl ac e f ront differential oil (Highlander, RAV4 and all 4WD models)
qReplace manual transmission oil (RAV4, Tundra)
qR eplace rear differential oil, including limited slip (all models except 2WD
Hi gh land erand 2WD RAV4)
qReplace transfer case oil (4WD models)
qTighten nuts and bolts on chassis
Dealer Service Verification:
Dat e :
M ileage:
35
__ Exhaust pipes and mountings
__ Fuel lines and connections, fuel tank band
and fuel tank vapor vent system hoses
__ Fuel tank cap gasket
__ Manual transmission oil (RAV4, Tundra)
__ R adiat or core and condenser
__ Rear differential oil (all models except
2WD Highlander and 2WD RAV4)
__ St eerin g gear box
__ Steering linkage and boots
__ Transfer case oil (all 4WD models)

Explanation of Maintenance Items
38
Engine Valve Clearance
Inspect for excessive lifter noise and engine vibration and adjust if necessary.
A qualified technician should perform this operation.
Exhaust Pipes and Mountings
Visually inspect the exhaust pipes, muffler and hangers for cracks, deterioration
and damage. Start the engine and listen carefully for any exhaust gas leakage.
Tighten connections or replace parts as necessary.
Fuel Lines and Connections, Fuel Tank Band and
Fuel Tank Vapor Vent System Hoses
Visually inspect for corrosion, damage, cracks and loose or leaking connections.
Tighten connections or replace parts as necessary.
Fuel Tank Cap Gasket
Visually inspect for cracks, deterioration and damage and replace if necessary.
Nuts and Bolts on Chassis and Body
Retighten the seatmounting bolts and front/rear suspension member retaining
bolts to specified torque.
Propeller Shaft
Lubricate the propeller shaft spiders and slide yokes with lithiumbase chassis grease
and the double cardan joint with molybdenumdisulfide lithiumbase chassis grease,
and retorque the bolt. Only a qualified technician should retorque the bolt.
Radiator Core and Condenser
Inspect for debris and signs of damage. Have any problem repaired immediately
by a qualified technician.
Spark Plugs
Replace at specified intervals. Install new plugs of the same type as originally
equipped. A qualified technician should perform this operation.
Steering Gear Box
Inspect for signs of leakage. If you discover any leakage, have it repaired imme
diately by a qualified technician.

*The titles given inside the components are the names of the terminals (terminal codes) and are not treated as being
abbreviations.
2005 HIGHLANDER (EWD592U)
17
ABBREVIATIONS D
ABBREVIATIONS
The following abbreviations are used in this manual.
2WD = Two Wheel Drive Vehicles
A/C = Air Conditioning
A/T = Automatic Transaxle
ABS = Anti-Lock Brake System
ACIS = Acoustic Control Induction System
ACM = Active Control Engine Mount
BEAN = Body Electronics Area Network
CAN = Controller Area Network
EC = Electrochromic
ECU = Electronic Control Unit
ESA = Electronic Spark Advance
EVAP = Evaporative Emission
IC = Integrated Circuit
J/B = Junction Block
LH = Left-Hand
O/D = Overdrive
R/B = Relay Block
RH = Right-Hand
SFI = Sequential Multiport Fuel Injection
SRS = Supplemental Restraint System
SW = Switch
TEMP. = Temperature
TRAC = Traction Control
VSC = Vehicle Stability Control
VSV = Vacuum Switching Valve
VVT = Variable Valve Timing
w/ = With
w/o = Without

A87847
EFI Relay EFI NO. 1 Fuse Engine Room J/B
Vacuum Tank
Engine Mounting Insulator FR
Air Cleaner Cap
05-668
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
858 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ACTIVE CONTROL ENGINE MOUNT
LOCATION
05EXI-05

A88702
EH FL
MainEFI NO. 2
2IK313 2D
5
3
5P-L
BatteryEFI RelayEngine Room R/B No. 2
WEngine Room J/B
1ECM
MREL
E58
BY-G V5
VSV for ACM
27
B B-W
1EB2 2 2
2 1
Y
3
14EFI NO. 1
2I 2F2B
W 3
1F7
FL Block
Assy
A
J2
J/C W-BACM 6
E9
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
05-669
859 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
CIRCUIT DESCRIPTION
The Active Control Engine Mount (ACM) system decreases engine vibration at low engine speed using the
VSV for ACM. The VSV is controlled by a pulse signal transmitted to the VSV from the ECM. The frequency
of this pulse signal is matched to the engine speed to decrease engine vibration.
WIRING DIAGRAM

A61613
A
C EngineB IAC Valve
Actuator
Air Cleaner
Front Engine Mount InsulatorVSVCap ECM Vacuum Tank
A61611
05-670
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
860 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK VACUUM HOSES
(a) Check if the vacuum hose cap is missing.
(b) If the hose is damaged, replace the vacuum hose assem-
bly.
(c) Check the air and vacuum hoses for looseness, discon-
nection and blockage.
NG REPAIR OR REPLACE VACUUM HOSES
OK
2 CHECK VACUUM
(a) Start the engine.
(b) Disconnect the vacuum hose from the vacuum tank.
(c) Check that the unconnected port located on the vacuum
tank applies suction to your finger.
(d) Reconnect the vacuum hose.
NG CHECK AND REPLACE VACUUM SOURCE AND
HOSES
OK