2001 TOYOTA HIGHLANDER light

2005 HIGHLANDER (EWD592U)
82
Engine Control for 3MZ-FE
The engine control system utilizes a microcomputer and maintains overall control of the engine, transmission etc. An outline
of the engine control is given here.
1. Input Signals
(1) Engine coolant temp. signal circuit
The engine coolant temp. sensor detects the engine coolant temp. and has a built-in thermistor with a resistance, which
varies according to the engine coolant temp. The engine coolant temp. which is input into TERMINAL THW of the
engine control module as a control signal.
(2) Intake air temp. signal circuit
The intake air temp. sensor is installed in the mass air flow meter and detects the intake air temp. which is input as a
control signal to TERMINAL THA of the engine control module.
(3) Vehicle speed signal circuit
The vehicle speed signal is input from the ABS speed sensor to skid control ECU with actuator, and are sent to the
engine control module through communication control.
(4) RPM signal circuit
Camshaft position is detected by the VVT sensors and its signal is input to TERMINALS VV1+ and VV2+ of the engine
control module as a control signal. Also, engine RPM is detected by the crankshaft position sensor and is input as a
control signal to TERMINAL NE+.
(5) Throttle position signal circuit
The throttle control motor and sensor detects the throttle valve opening angle as a control signal, which is input into
TERMINALS VTA1 and VTA2 of the engine control module.
(6) Battery signal circuit
Voltage is constantly applied to TERMINAL BATT of the engine control module. With the ignition SW turned on, the
voltage for engine control module start-up power supply is applied to TERMINALS +B and +B2 of the engine control
module via the EFI relay.
The current flowing through the IGN fuse flows to TERMINAL IGSW of the engine control module.
(7) Intake air volume signal circuit
Intake air volume is detected by the mass air flow meter and the signal is input to TERMINAL VG of the engine control
module as a control signal.
(8) Stop light SW signal circuit
The stop light SW is used to detect whether the vehicle is braking or not and the signal is input into TERMINAL STP of
the engine control module as a control signal.
(9) Starter signal circuit
To confirm whether the engine is cranking, the voltage is applied to the starter motor during cranking is detected and the
signal is input into TERMINAL STA of the engine control module as a control signal.
(10) Engine knock signal circuit
Engine knocking is detected by knock sensors and the signal is input into TERMINALS KNK1 and KNK2 as a control
signal.
(11) Air fuel ration signal circuit
The air fuel ration is detected and input as a control signal into TERMINALS A1A+ and A2A+ of the engine control
module.
(12) Oxygen sensor signal circuit
The oxygen density in the exhaust gases is detected and input as a control signal into TERMINALS OX1B and OX2B of
the engine control module.
To maintain stable detection performance by the heated oxygen sensor, a heater is used for warning the sensor. The
heater is also controlled by the engine control module (HT1B and HT2B).
(13) Fuel cut in a collision
The system receives the collision signal from airbag sensor assembly in the vehicle has a collision and stops the fuel
pump operation on the side of the engine control module.
System Outline

2005 HIGHLANDER (EWD592U)
86
Engine Control for 3MZ-FE
: GROUND POINTS
CodeSee PageGround Points Location
EC48 (3MZ-FE)Left Side of Cylinder Head
ED48 (3MZ-FE)Rear Side of Cylinder Head
EH48 (3MZ-FE)Under the Left Headlight
IB52Right Instrument Panel Brace
IC52Right Cowl Side Panel
BC56Left Side of Rear Cross Member
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E6I654Engine Wire
E748 (3MZ-FE)Engine WireI7
E14
()g
I854Cowl Wire
E1648 (3MZ-FE)Engine Room Main WireI9

'05 HIGHLANDER_U (L/O 0409)
11 9
2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
OPERATION OF INSTRUMENTS AND
CONTROLS
Lights, Wipers and Defogger
Headlights and turn signals120 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Emergency flashers123 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument panel light control123 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front fog lights124 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior lights124 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Personal lights125 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition switch light126 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield wipers and washer127 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear window wiper and washer128 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear window and outside rear view mirror defoggers and windshield
wiper de- icer128 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 1- 5

'05 HIGHLANDER_U (L/O 0409)
120
2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
HEADLIGHTS
To turn on the following lights: Twist
the headlight/turn signal lever knob.
Position 1ÐParking, tail, license plate,
side marker and instrument panel lights
Position 2ÐHeadlights and all of the
above
Position 3 (AUTOº)ÐHeadlights and/or all
of the lights in position 1
They automatically turn on or off depend-
ing on the darkness of the surroundings.
Manually twist the knob to the position 2
to turn on the headlights if they are need-
ed immediately when entering a dark tun-
nel, parking structure, etc.The automatic light control sensor is on
the top of the driver's side instrument
panel.
Do not place anything on the instrument
panel, and/or do not affix anything on the
windshield to block this sensor.
If you feel that the automatic light control
comes into operation too early or too late,
have the sensor adjusted by your Toyota
dealer.The lights automatically turn off when the
driver 's door is opened with the ignition
key in the ACCº or LOCKº position. To
turn them on again, turn the key to the
ONº position or actuate the headlight
switch. If you are going to park for over
one week, make sure the headlight switch
is off.
NOTICE
To prevent the battery from being dis-
charged, do not leave the lights on
for a long period when the engine is
not running.
Daytime running light system
(on some models)
The headlights turn on at reduced intensi-
ty when the parking brake is released with
the engine started, even with the light
switch in the OFFº position. They will not
go off until the ignition switch is turned
off.
To turn on the other exterior lights and
instrument panel lights, twist the knob to
position 1.
Twist the knob to position 2 to turn the
headlights to full intensity for driving at
night.
Headlights and turn signals
(with automatic light control
system)

'05 HIGHLANDER_U (L/O 0409)
121
2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
High- Low beamsÐFor high beams, turn
the headlights on and push the lever away
from you (position 1). Pull the lever to-
ward you (position 2) for low beams.
The headlight high beam indicator light
(blue light) on the instrument panel will
tell you that the high beams are on.
Flashing the high beam headlights
(position 3)ÐPull the lever all the way
back. The high beam headlights turn off
when you release the lever.
You can flash the high beam headlights
with the knob turned to OFFº.TURN SIGNALS
To signal a turn, push the headlight/
turn signal lever up or down to position
1.
The key must be in the ONº position.
The lever automatically returns after you
make a turn, but you may have to return
it by hand after you change lanes.
To signal a lane change, move the lever
up or down to the pressure point (position
2) and hold it.
If the turn signal indicator lights (green
lights) on the instrument panel flash faster
than normal, a front or rear turn signal
bulb is burned out. See Replacing light
bulbsº on page 400 in Section 7- 3.HEADLIGHTS
To turn on the following lights: Twist
the headlight/turn signal lever knob.
Position 1ÐParking, tail, license plate,
side marker and instrument panel lights
Position 2ÐHeadlights and all of the
above
The lights automatically turn off when the
driver 's door is opened with the ignition
turned off. To turn them on again, turn the
key to the ONº position or actuate the
headlight switch. If you are going to park
for over one week, make sure the head-
light switch is off.
Headlights and turn signals
(without automatic light
control system)

'05 HIGHLANDER_U (L/O 0409)
122
2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
NOTICE
To prevent the battery from being dis-
charged, do not leave the lights on
for a long period when the engine is
not running.
Daytime running light system
(on some models)
The headlights turn on at reduced intensi-
ty when the parking brake is released with
the engine started, even with the light
switch in the OFFº position. They will not
go off until the ignition switch is turned
off.
To turn on the other exterior lights and
instrument panel lights, twist the knob to
position 1.
Twist the knob to position 2 to turn the
headlights to full intensity for driving at
night.
High- Low beamsÐFor high beams, turn
the headlights on and push the lever away
from you (position 1). Pull the lever to-
ward you (position 2) for low beams.
The headlight high beam indicator light
(blue light) on the instrument panel will
tell you that the high beams are on.
Flashing the high beam headlights
(position 3)ÐPull the lever all the way
back. The high beam headlights turn off
when you release the lever.
You can flash the high beam headlights
with the knob turned to OFFº.TURN SIGNALS
To signal a turn, push the headlight/
turn signal lever up or down to position
1.
The key must be in the ONº position.
The lever automatically returns after you
make a turn, but you may have to return
it by hand after you change lanes.
To signal a lane change, move the lever
up or down to the pressure point (position
2) and hold it.
If the turn signal indicator lights (green
lights) on the instrument panel flash faster
than normal, a front or rear turn signal
bulb is burned out. See Replacing light
bulbsº on page 400 in Section 7- 3.

'05 HIGHLANDER_U (L/O 0409)
123
2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
To turn on the emergency flashers,
push the switch.
All the turn signal lights will flash. To turn
them off, push the switch once again.
Turn on the emergency flashers to warn
other drivers if your vehicle must be
stopped where it might be a traffic hazard.
Always pull as far off the road as pos-
sible.
The turn signal light switch will not work
when the emergency flashers are operat-
ing.
NOTICE
To prevent the battery from being dis-
charged, do not leave the switch on
longer than necessary when the en-
gine is not running.
To adjust the brightness of the instru-
ment panel lights, turn the knob.
Emergency flashers Instrument panel light control

'05 HIGHLANDER_U (L/O 0409)
124
2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
To turn on the front fog lights, twist
the band of the headlight and turn sig-
nal switch lever. They will come on
only when the headlights are on low
beam.To turn on the interior light, slide the
switch.
The interior light switch has the following
positions:
ONºÐKeeps the light on all the time.
OFFºÐTurns the light off.
DOORºÐ
Center: Turns the light on when any of the
side doors and back door are opened.
Rear: Turns the light on when the back
door is opened.ILLUMINATED ENTRY SYSTEM
(center interior light)
When the switch is in the DOORº posi-
tion and any of the side doors and back
door is opened, the light will come on.
After all the side doors and back door are
closed, the light remains on for about 15
seconds before fading out.
However, in the following cases, the light
fades out immediately:

All the side doors and back door are
closed when the ignition key is in
ACCº or ONº position.

The ignition key is turned to ACCº or
ONº after all the side doors and back
door are closed.

All the side doors and back door are
locked when the light is still on.
When all the side doors and back door
are unlocked using either the key or the
wireless remote control transmitter simul-
taneously, the light will come on and re-
main on for about 15 seconds before fad-
ing out.
Front fog lights Interior lights