2001 TOYOTA HIGHLANDER engine

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2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
In the following cases, contact your Toyota
dealer:
The warning light does not come on
after the ignition key is turned to ONº.
The warning light remains on after the
ignition key is turned to ONº.
The warning light comes on while driv-
ing.
The TRAC OFFº indicator light will come
on when the VSCº warning light comes
on even if the TRAC OFFº switch is not
pushed.The traction control system automatical-
ly helps prevent the spinning of 4
wheels when the vehicle is started or
accelerated on slippery road surfaces.
When the ignition key is turned to ONº,
the system automatically turns on.CAUTION
Under certain slippery road condi-
tions, full traction of the vehicle and
power against 4 wheels cannot be
maintained, even though the traction
control system is in operation. Do not
drive the vehicle under any speed or
maneuvering conditions which may
cause the vehicle to lose traction
control. In situations where the road
surface is covered with ice or snow,
your vehicle should be fitted with
snow tires or tire chains. Always
drive at an appropriate and cautious
speed for the present road condi-
tions.
NORMAL DRIVING MODE
Leave the system on during the ordi-
nary driving so that it can operate
when needed.
You may hear a sound in the engine
compartment for a few seconds when the
engine is started or just after the vehicle
begins to move. This means that the trac-
tion control system is in the self- check
mode, but does not indicate a malfunction.
Traction control system
(four- wheel drive models)

'05 HIGHLANDER_U (L/O 0409)
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2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
The vehicle stability control system
helps provide comprehensive control of
the systems such as anti- lock brake
system, traction control, engine control,
etc. This system automatically controls
the brakes and engine to help prevent
the vehicle from skidding when corner-
ing on a slippery road surface or oper-
ating steering wheel abruptly.
This system activates when the vehicle
speed is about more than 15 km/h (9
mph).
You may hear a sound in the engine
compartment for a few seconds when the
engine is started or just after the vehicle
begins to move. This means that the sys-
tem is in the self- check mode, but does
not indicate a malfunction.CAUTION
Do not rely excessively on the ve-
hicle stability control system. Even
if the system is operating, it cannot
completely eliminate the possibility
of an accident. Always keep safe
driving in mind, as reckless driving
increases the risk of an accident. If
the slip indicator light blinks, spe-
cial care should be taken while
driving.
Only use tires of specified size. The
size, manufacture, brand and tread
pattern for all 4 tires should be the
same. If you use the tires other
than specified, or different type or
size, the vehicle stability control
system may not function correctly.
When replacing the tires or wheels,
contact your Toyota dealer. (See
Checking and replacing tiresº on
page 388 in Section 7- 2.)
If the vehicle is going to skid during driv-
ing, the slip indicator light blinks and an
alarm sounds intermittently. Special care
should be taken while driving.
The slip indicator light comes on for a few
seconds when the ignition key is turned
to ONº. If the indicator light does not
come on when the ignition is turned on,
contact your Toyota dealer.
Vehicle stability control
system

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2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
Ty p e A
Ty p e B
When parking, firmly apply the parking
brake to avoid inadvertent creeping.
To set: Fully depress the parking brake
pedal. For better holding power, first de-
press the brake pedal and hold it while
setting the parking brake.
To release: Depress the parking brake
pedal once again.
To remind you that the parking brake is
set, the parking brake reminder light in
the instrument panel remains on until you
release the parking brake.
The buzzer will remind you to release the
parking brake when the vehicle speed
rises above 5 km/h (3 mph) with the park-
ing brake is applied.
CAUTION
Before driving, be sure the parking
brake is fully released and the park-
ing brake reminder light is off.
The cruise control allows you to cruise
the vehicle at a desired speed over 40
km/h (25 mph) even with your foot off
the accelerator pedal.
Your cruising speed can be maintained up
or down grades within the limits of engine
performance, although a slight speed
change may occur when driving up or
down the grades. On steeper hills, a
greater speed change will occur so it is
better to drive without the cruise control.
CAUTION
To help maintain maximum control
of your vehicle, do not use the
cruise control when driving in
heavy or varying traffic, or on slip-
pery (rainy, icy or snow- covered) or
winding roads.
Avoid vehicle speed increases when
driving downhill. If the vehicle
speed is too fast in relation to the
cruise control set speed, cancel the
cruise control then downshift the
transmission to use engine braking
to slow down.
Parking brake Cruise control

'05 HIGHLANDER_U (L/O 0409)
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2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
RESETTING TO A FASTER SPEED
Push the lever up in the + RESº direction
and hold it. Release the lever when the
desired speed is attained. While the lever
is held up, the vehicle will gradually gain
speed.
However, a faster way to reset is to ac-
celerate the vehicle and then push the
lever down in the - SETº direction.
RESETTING TO A SLOWER SPEED
Push the lever down in the - SETº direc-
tion and hold it. Release the lever when
the desired speed is attained. While the
lever is held down, the vehicle speed will
gradually decrease.
However, a faster way to reset is to de-
press the brake pedal and then push the
lever down in the - SETº direction.
Even if you turn off the overdrive switch
with the cruise control on, engine braking
will not be applied because the cruise
control is not cancelled. To decrease the
vehicle 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.RESUMING THE PRESET SPEED
If the preset speed is cancelled by pulling
the control lever or by depressing the
brake pedal, pushing the lever up in the
+ RESº direction will restore the speed
set prior to cancellation.
However, once the vehicle speed falls be-
low about 40 km/h (25 mph), the preset
speed will not be resumed.
CRUISE CONTROL FAILURE WARNING
If the CRUISEº indicator light in the
instrument cluster flashes when using the
cruise control, press the ON- OFFº switch
to turn the system off and then press it
again to turn it on.
If any of the following conditions then oc-
curs, there is some trouble in the cruise
control system.
The indicator light does not come on.
The indicator light flashes again.
The indicator light goes out after it
comes on.
If this is the case, contact your Toyota
dealer and have your vehicle inspected.

2005 HIGHLANDER (EWD592U)
102
ECT and A/T Indicator for 3MZ-FE
1 11 4 12 5 10 8 2 9
G- YW P- L
+B BATT20A
EF1 NO. 1
B- W W- B
L- B
Y- R
Y- B
Y- G
L- Y
L- R
G- B
G- R
23 15
2B 4 2F 4 2B 52B7
Y
R W
IK2 10 IK21110A
IGN
1G 620A
STOP
1E 1
4E 1
B BRP
I 74M 4
EH1 2
4M 124L 3
1A A3A9B1921G7. 5A
IG1
A 8
BRW
D 9D13 D11 D15 D17 D32 D 16 D 12 D14R
E 1SL1- SL1+
18 D 19 D
B- WR- B
613 IGSW STP
A
J 2MREL SR SLT+ SLT- DSL SL2+ SL2-
W- B
SL3+ SL3- THO1
S15
EFI
Relay
IK3 13
B
B
IM1 10
R
E
E
V
G
GR
SB
LG
BR
R
OL
+B2 2A
WW
P
W
B
O
3
L- W
D 10S4
Y
THO SL3- SL3+ SL1- SL1+ SL2- SL2+ DSL SLT- SLT+ S4 SR
E2
7
BR
J 6
From Power Source System (
See Page 62)
E 5(
A)
, E 6(
B)
, E 7(
E)
, E 8(
D)
, E 9(
C)
Electr onically Controlled Transmission SolenoidEngine Control Module
Junction
Connector
Junction
Connector
Stop Light SW

2005 HIGHLANDER (EWD592U)
103
20 IM1
W- B W- B
W- B
W- B W- B W- BBR G- BY BR
L- W
GP
Y- GG Y- R R- BL- Y
9
J 6
IM1
7C
EC ED6E 7E PL RL NL DL 2L LL
61 97382
6D 1C D7E03
W- B
W- B J 7
9B B 20 B 10 7A B 11 A 6
A
A R
BR
B- R
VC
3 5
VTA2 R
1 2
E14 E 28 E18 E19
VTA1
BR
T1 3
E 2
4 64AP 1
54K
PR ND3 2
E2 VC THW E04E1 E05 E01 E02 B
B C
C B
B7IM1 18 IM1 8IM1 19 IM1
I 6
J 6
J17Y GRL VV
L
GR
G
E 31VTA2
R- W
6E 21VTA1G
NC- NC+ NT- NT+
W- GR R- WWT 3
C 6
D 261
2
D 34 35 D 2 1
27 D B
BR
A 5B 5
E2
W- BW- B W- BG
RB
BR4CME01
W- B
I 6
W
M- 1C 2M- M+
3C
2
M+
B
GE0 1
C 17
Y
(
Shielded)
E 5(
A)
, E 6(
B)
, E 7(
E)
, E 8(
D)
, E 9(
C)
E 5(
A)
, E 6(
B)
, E 7(
E)
, E 8(
D)
, E 9(
C)
S28(
A)
, S29(
B)
Counter Gear Speed
Sensor Engine Coolant Temp.
Sensor
Engine Control Module Engine Control Module
Junction
Connector
Junction
Connector
Junction
ConnectorJunction
Connector
A/T Indicator SW
Shor t Connector
Turbine Speed Sensor
Thr ottle Position Sensor Throttle Control Motor

2005 HIGHLANDER (EWD592U)
104
ECT and A/T Indicator for 3MZ-FE
BMPX-
A
1MPX1
W
2IF3R
SNOW MPX1
A 16
10
GR
ODMS9
MPX2
L
GR W- B
L
W- BW- BR
MPX2
V GR Y
E 4
29 BBR
R
8B
6
IB 13 3F6
83H3
4 A17
IF3 82B A IB2 8
IB2 1
IF3 5
15
O
7
8 MPX1
MPX2
A
P 5
MPX+
W
18 B
52
BR G
B
Y
SPD
17 B
IL2 9
Y
G
83D2 B 1
A 1A2
BR
24
MPX1
BR
22
MPX2
G V
4
11MPD1
MPD2
G 5
IL2 12
SB
74F 54AG
SB
Y IL2 1
SB
IF3 12
(
*1) (
*1)
G
(
*2)
G
Y
T16
S30(
A)
, S31(
B)
A10(
A)
, A11(
B)
B 9(
A)
, B10(
B)
E 5(
A)
, E 6(
B)
, E 7(
E)
, E 8(
D)
, E 9(
C)
A/C Control Assembly Airbag Sensor Assembly
Body ECU
Electronically Controlled
Transmission Pattern Select SW
Engine Control Module
Gateway ECU Power Window Master SW
with ECUShort Connector Transmission Control SW
Transmission Shift Main SW

2005 HIGHLANDER (EWD592U)
107
Previous automatic transaxle have selected each gear shift using mechanically controlled throttle hydraulic pressure,
governor hydraulic pressure and lock-up hydraulic pressure. The electronically controlled transmission, however, electrically
controls the line pressure, throttle pressure, lock-up pressure and accumulator pressure etc. through the solenoid valve. The
electronically controlled transmission is a system which precisely controls gear shift timing and lock-up timing in response to
the vehicle's driving conditions and the engine condition detected by various sensors. It makes smooth driving possible by
shift selection for each gear which is the most appropriate to the driving conditions at that time, and by preventing downing,
squat and gear shift shock when starting off.
1. Gear Shift Operation
During driving the engine warm up condition signal is input from engine coolant temp. sensor to TERMINAL THW of the
engine control module, and the vehicle speed signal is input from the ABS speed sensor to skid control ECU, and are sent to
the engine control module through communication control. At the same time, the throttle valve opening signal is sent from
the throttle position sensor to the TERMINALS VTA1 and VTA2 of the engine control module, as the throttle angle signal.
2. Lock-Up Operation
When the engine control module decides based on each signal that the lock-up condition has been met, the current flows
through TERMINAL DSL of the engine control module to TERMINAL 10 of the electronically controlled transmission solenoid
to GROUND.
3. Stop Light SW Circuit
If the brake pedal is depressed (Stop light SW on) when driving in lock-up condition, a signal is input to TERMINAL STP of
the engine control module. The engine control module operates and cuts the current to the solenoid to release lock-up.
4. Overdrive Circuit
*O/D main SW on
When the O/D main SW is turned on, a signal is input to TERMINAL ODMS of the engine control module and engine
control module operation causes gear shift when the conditions for overdrive are met.
*O/D main SW off
When the O/D main SW is turned off, a signal is input into TERMINAL ODMS of the engine control module, and turns on
the O/D off indicator light. This activates the ECU, and the transmission system is controlled not to shift to overdrive.
E4 Electronically Controlled Transmission Pattern Select SW
3-4 : Closed with the select SW at SNOW position
E5 (A), E6 (B), E7 (E), E8 (D), E9 (C) Engine Control Module
BATT-E1 : Always approx. 12 volts
MREL-E1 : Approx. 12 volts with the ignition SW ON position
P1 A/T Indicator SW
2-6 : Closed with the shift lever in P position
2-1 : Closed with the shift lever in R position
2-9 : Closed with the shift lever in N position
2-7 : Closed with the shift lever in D position
2-3 : Closed with the shift lever in 2 position
2-8 : Closed with the shift lever in L position
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A10A42E5A42P544
A11B42E6B42S1543
A1742E7E42S2739 (3MZ-FE)
B9A42E8D42S28A43
B10B42E9C42S29B43
C638 (3MZ-FE)G543S30A43
C11A42J239 (3MZ-FE)S31B43
C12B42J643T339 (3MZ-FE)
E138 (3MZ-FE)J743T1339 (3MZ-FE)
E238 (3MZ-FE)J1743T1643
E442P139 (3MZ-FE)
System Outline
Service Hints