2001 TOYOTA HIGHLANDER immobilizer

'05 HIGHLANDER_U (L/O 0409)
17
2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
The engine immobilizer system is a
theft prevention system. When you in-
sert the key in the ignition switch, the
transponder chip in the key's head
transmits an electronic code to the ve-
hicle. The engine will start only when
the electronic code in the chip corre-
sponds to the registered ID code for
the vehicle.The system is automatically set when the
key is removed from the ignition switch.
The indicator light will start flashing to
show the system is set.
In the following cases, contact your Toyota
dealer.

The indicator light stays on.

The indicator light does not start flash-
ing when the key is removed from the
ignition switch.

The indicator light flashes inconsistent-
ly.
Inserting the registered key in the ignition
switch automatically cancels the system,
which enables the engine to start. The
indicator light will go off.For your Toyota dealer to make you a
new key with built- in transponder chip,
your dealer will need your key number
and master key. However, there is a limit
to the number of additional keys your
Toyota dealer can make for you.
If you make your own duplicate key,
you will not be able to cancel the sys-
tem or start the engine.
NOTICE
Do not modify, remove or disas-
semble the engine immobilizer sys-
tem. If any unauthorized changes or
modifications are made, proper opera-
tion of the system cannot be guaran-
teed.
Engine immobilizer system

'05 HIGHLANDER_U (L/O 0409)
32
2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
3. Hold the hood open by inserting the
support rod into the slot.
Before closing the hood, check to see that
you have not forgotten any tools, rags,
etc. and return the support rod to its
clipÐthis prevents rattles. Then lower the
hood and make sure it locks into place.
If necessary, press down gently on the
front edge to lock it.
CAUTION
After inserting the support rod into
the slot, make sure the rod supports
the hood securely from falling down
on to your head or body.
To deter vehicle theft, the system is
designed to sound an alarm if any of
the side doors, back door or hood is
forcibly unlocked or the battery termi-
nal is disconnected and then recon-
nected when the system is set.
The alarm blows the horn intermittently
and flashes the headlights, tail lights and
turn signal lights, and turns on the interior
light.SETTING THE SYSTEM
1. Turn the ignition key to the LOCKº
position and remove it.
The indicator light will start flashing when
the key is removed from the ignition
switch. (See Engine immobilizer systemº
on page 17 in this Section for details.)
2. Have all passengers get out of the
vehicle.
3. Close and lock all the side doors, back
door and hood.
The indicator light will remain on when all
the side doors, back door and hood are
closed and locked.
Theft deterrent system

2005 HIGHLANDER (EWD592U)
100
Engine Immobilizer System
10A
IGN
1G 67. 5A
ECU- B
E E1G 10
1D 9
W P P
PBRW-L
21 9E E4A 12
4G 5
P
GND TXCT CODE VC5
13 12 11 87 5 4 1
R W GRB
A A
P
SIL
7
T14 J17J16
J 6D 3
T 7
AGND TXCT CODE VC5 D +B IG
EFIO
6
B
IMIEFII
7
IMO
V
GND
14
W- B
IC E 6
IB KSW
10
G
CTY
4
B
1 2
4K 8
4N 14L71
D 7 K 4
W- B
B G
27 264M 4
4E 1IC3 5
P
2A 4
V
4G 9
W- B W- B
W- B
D D
J 6IF3 14
11 3K
3B 2
1 2
11 3F
3F 13IND
3
W R B W- B W- B
T 5IA1 9 Data Link Connector 3
Door Cour tesy SW
Front LH Engine Control ModuleJunction
Connector
Juncti on
ConnectorJunction
Connector
Junction
Connector
Unlock
War ning SW
Theft Deterrent
Indicator Light Transponder Key Amplifier
Transponder Key
Computer From Power Source System (
See Page 62)

'05 HIGHLANDER_U (L/O 0409)
146
2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
STARTºÐStarter motor on. The key
will return to the ONº position when
released.
For starting tips, see page 317 in Section
3.
ONºÐEngine on and all accessories
on.
This is the normal driving position.
ACCºÐAccessories such as the radio
operate, but the engine is off.
If you leave the key in the ACCº or
LOCKº position and open the driver's
door, a buzzer will remind you to remove
the key.LOCKºÐEngine is off and the steering
wheel is locked. The key can be re-
moved only at this position.
You must push in the key to turn it from
ACCº to the LOCKº position. The selec-
tor lever must be in the Pº position be-
fore pushing the key.
Vehicles with engine immobilizer sys-
temÐOnce you remove the key, the en-
gine immobilizer system is automatically
set. (See Engine immobilizer systemº on
page 17 in Section 1- 2.)
When starting the engine, the key may
seem stuck at the LOCKº position. To
free it, first be sure the key is pushed all
the way in, and then rock the steering
wheel slightly while turning the key gently.
2AZ- FE engine onlyÐApproximately five
hours after the engine is turned off, you
may hear sound coming from underneath
the luggage compartment for several min-
utes. This is normal operation and does
not indicate a malfunction. (See Leak
detection pumpº on page ix.)
NOTICE
Do not leave the key in the ONº
position if the engine is not running.
The battery will discharge and the
ignition could be damaged.
Ignition switch with steering
lock

2005 HIGHLANDER (EWD592U)
136
Interior Light
10A
DOME
2A 3
IK3 12
4H 6
4J 14D13 4D12
BE A1 2B 6 21
OFF
ON DOOR
IA1 15
R V B O
BG3 3
W- B R R
2 1
W B
IE1 1
B 1
2 1
IC 4L 74N1 4D 5IE1 8B 1
B 1
W- B W- B W- B W- B
W- B
W W W- B
1D 141E 4
IA2 1
112
21
OFF
ON DOOR V10
V 9 O 5
I16
6 2
T 71 2I14
B 1 B 1
IE1 5
4F 24J 5 4H 1
B W W
W
Y
B YY
W(
*2)
(
*1)
(
*1)
W
Y
(
*2) D 4
R11
R W- B
G
G GW- B
W- B
W- B
R
BR
BR
RW- B
* 1 : w/ Engine Immobilizer System
* 2 : w/o Engine Immobilizer System
(
*1)
(
*2)
GN D CTY+B1
B 1
R
7
R
3
R12 J14
W- B
W
3 4D 11
V
IL2 11LG LG LG* 3 : w/ Navigation System
* 4 : w/o Navigation System
4M 6
W- B
4H 11
W- B
W- B
From Power Source System (
See Page 62)
Ignition Key
Cylinder
IlluminationDiode
(
Rear Interior Light)
Ignition Key Cylinder
Illumination Interior Light Junction
Connector
Overhead J/B Rear Interior Light Rear Interi or
Light SW
Tr ansponder Key Amplifier Vani ty Light LH Vani ty Light RH

2005 HIGHLANDER (EWD592U)
203
4H 11 4G 9D 7GND1
D DB 2KSW
1 2
G G W- B
W- BJ 6 K 4
32A10A
DOME
IK3 12
4H 6
4D 9
BF IK3 14
3IK3
4M 3
4N 1
IC 74L2 1C 15
R V L- Y W W- B W- B W- B
W- B
W- B
A
W 5
BZR C 16 C17
RDA PRGIO2 14 IO215
GR
YSB
BR
1 3 25B
IO2 10
W- B
+B RDA PRG E* 4 : w/ Engine Immobilizer System
* 5 : w/o Engine Immobilizer System
ILE
D 11
BR
4D 13 4D12
IE1 1
WB
21
OFF
ON DOOR
5IE1
R G
4H 1
4F 24J 5
BR
2
61 2
I16
T 7
I14 GY
Y G(
*4)
(
*5) (
*5) (
*4)
W 6
R D D
J18 B
B 1
W
B 1
R
+B1
112
7
4D 5
4M 6
1E 4
1D 14
IA
W- B W- B
W R W- B
GND CTYO 5
J19
W- B
A A W- B W- BW- B
IE18B 13
W- B
W- B
W- B
B 9(
A)
, B10(
B)
, B11(
C)
, B12(
D)From Power Source System (
See Page 62)
Ignition Key
Cylinder
Illumination
Body ECU
Ignition Key Cylinder
Illumination Interior LightJunction
Connector
Junction
Connector
Junction
Connector
Unlock Warning SW
Overhead J/B
Transponder Key Amplifier Wireless Door Lock Buzzer
Wireless Door Lock ECU

B51715B79970
T1410
G K4
Unlock Warning
Switch Assy
1
2 W-B
G
KSW DD
IC W-B4L 4G 9
7J6
Junction Connector
Passenger
Side J/BTransponder Key ECU Assy 05-1998
- DIAGNOSTICSENGINE IMMOBILIZER SYSTEM
2188 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B2780 PUSH SWITCH/KEY UNLOCK WARNING
SWITCH MALFUNCTION
CIRCUIT DESCRIPTION
This DTC will be output if the transponder key ECU does not detect that the unlock warning switch is ON
even when the ignition switch is ON (under normal condition, the unlock warning switch is ON when the igni-
tion switch is ON).
DTC No.DTC Detection ConditionTrouble Area
B2780Unlock warning switch ON is not detected when ignition
switch is ON
Unlock warning switch assy

Wire harness

Transponder key ECU assy
WIRING DIAGRAM
05A2A-06

B51581
21
3 4Pushed Not pushed
- DIAGNOSTICSENGINE IMMOBILIZER SYSTEM
05-1999
2189 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the hand-held tester and start from step 2 when not using the
hand-held tester.
1 READ VALUE OF HAND-HELD TESTER
(TRANSPONDER KEY ECU (SWITCH CONDITION))
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON with the key that cannot start the engine.
(c) On the hand-held tester, select the following menu item: DIAGNOSIS/ENHANCED OBD II/DATA
LIST/IMMOBILISER/KEY SW. Read the values.
OK: ºONº (Key is in ignition key cylinder) appears on the screen.
ItemMeasurement Item/
Display (Range)Normal ConditionDiagnostic Note
KEY SWUnlock warning switch signal
/ON or OFFON: Key is in ignition key cylinder
OFF: No key is in ignition key cyl-
inder
-
NG Go to step 2
OK
REPLACE TRANSPONDER KEY ECU ASSY
2 INSPECT UNLOCK WARNING SWITCH ASSY
(a) Remove the unlock warning switch.
(b) Measure the resistance of the unlock warning switch.
Standard:
Tester ConnectionSwitch PositionSpecified Condition
1 - 2PushedBelow 1 W
1 - 2Not pushed10 kW or higher
NG REPLACE UNLOCK WARNING SWITCH ASSY
OK