2000 LEXUS GS400 engine

BE0GQ±03
I01365
Luggage Compartment
Courtesy SwitchIgnition Switch
Door Lock Assembly

Door Lock Motor

Door Unlock Detection
Switch

Door Key Lock and
Unlock Switch
Door Lock Assembly

Door Lock Motor

Door Unlock Detection
Switch

Door Key Lock and Unlock SwitchLuggage Compartment
Opener Switch
Luggage Compartment
Key Lock and Unlock
Switch
Horn Theft Deterrent HornEngine Room No.1 Junction Block

HORN Fuse

Headlight Control Relay

Starter Relay
Engine Hood Courtesy Switch
Driver Side Junction Block

ST Fuse

Taillight Control RelayEngine Room No.2 Relay Block

Horn Relay
BE±140
± BODY ELECTRICALTHEFT DETERRENT SYSTEM
2441 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
THEFT DETERRENT SYSTEM
LOCATION
The vehicle shown in this illustration is ºGS400º.
All components of ºGS300º other than the ones used for engine are same as ºGS400º.

DI3CO±10
± BODY ELECTRICALTHEFT DETERRENT SYSTEM
BE±141
2442 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
PRE±CHECK
1. THEFT DETERRENT SYSTEM
When the system is set to the theft deterrent mode and any of
the following conditions are met, the system sounds the horns
and flashes the headlights and the taillights for approx. 1 min-
ute.
At the same time the system locks all doors (If all door are not
locked at once, the system repeats door locking operation ev-
ery 0.55 seconds during the one minute alarm time).
There are 2 modes in this system, which are active mode and
passive mode.
All initial setting are performed in active mode. It can be
switched to passive mode by specified operation. (See step 4.
CHANGING METHOD OF PASSIVE MODE)
Condition:
Any of the doors (Including the engine hood and luggage
compartment door) is unlocked or opened without the
key. *1
The battery terminal is disconnected and reconnected.
The system receives panic signal from remote keyless
entry. *2
*1: Only active arming mode.
*2: When the ignition key is not inserted in the key cylin-
der.
There are 4 conditions in this system which are disarming
condition, disarming preparation condition, arming condition
and alarming condition.
(a) Disarming condition:
(1) When a user is near the vehicle.
(2) When the alarming function does not operate.
(3) When theft deterrent function is not performed.
(b) Disarming preparation condition:
(1) Time from a user locks a door to be leaves the ve-
hicle.
(2) Time until transferring to disarming condition.
(3) Theft deterrent function is not performed.
(c) Arming condition:
(1) When a user leaves the vehicle completely.
(2) When theft deterrent function is possible.

Disarming condition
Any of the following conditions is met

When all doors and engine hood are closed, lock all the doors using a key.

When all doors and engine hood are closed, lock all the doors using wireless remote function.

When all doors and engine hood are closed, open and close either of doors and engine hood
then close and lock all doors and engine hood.
Disarming preparation condition
Any of the following conditions is met

30 seconds elapse when the engine hood
is closed and all doors are locked.
Any of the following conditions is met

Close and open either of all doors and
engine hood.

Lock and unlock either of doors.

Insert a key into the ignition key cylinder.

Reconnect the battery.
Arming condition
Any of the following conditions is met

Unlock the locked doors using the wireless
remote function.

Unlock the locked doors using the key.

Insert the key into the ignition key cylinder
and turn the ignition key ON.
Any of the following conditions is met

Either of closed doors opens.

Either of locked doors is unlocked by any
operation other than key or wireless remote
function.

The closed engine hood is opened.

The battery is reconnected.
Alarming condition
Any of the following conditions is met

Unlock the locked doors using the wireless
remote function.

Unlock the locked doors using the key.

Insert the key into the ignition key cylinder
and turn the ignition key ON.
In this mode, once theft is detected, it is
informed using light and sound to people
around the vehicle.
The alarming time described above passes.
(Key not inserted in ignition cylinder.)
± BODY ELECTRICALTHEFT DETERRENT SYSTEM
BE±143
2444 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
2. ACTIVE ARMING MODE

Disarming condition (A)
Disarming preparation condition
Any of the following
conditions is met

With all doors and
engine hood closed
30 seconds elapse.
Arming condition
Any of the following conditions is met
(Refer to HINT * on the next page)

Press unlock switch of the wireless.

Insert the key into the driver and passenger
doors key cylinders, turn the key to unlock.

Insert the key into the ignition key cylinder
and turn the key to ON.
Any of the following conditions is met

Either of closed door is opened and entry
delay time elapses. (Refer to HINT on the
next page)

Engine hood is closed and opened.

Battery is reconnected.
Alarming condition
In this mode, once theft is detected, it is
informed using light and sound to people
around the vehicle.
The alarming time described above passes.
Any of the following conditions is met

Pull the key out of the ignition key cylinder which the key was inserted in.
Disarming condition (B)
Any of the following conditions is met

Press the unlock button of wireless.

Insert the key into the key cylinder of driver
or passenger seat and turn the key to unlock.

Insert the key into the ignition key cylinder.

Reconnect the battery.
Any of the following conditions is met

Open and close either of all doors and
engine hood.
Any of the following conditions is
met

Close and open either of
all doors and engine hood.Any of the following conditions is met

Press the unlock button of wireless.

Insert the key into the key cylinder of driver
or passenger seat and turn the key to unlock.

Insert the key into the ignition key cylinder.

Reconnect the battery.
Any of the following conditions is met

Press unlock switch of the wireless.

Insert the key into the driver and passenger
doors key cylinders, turn the key to unlock.

Insert the key into the ignition key cylinder
and turn the key to ON.
± BODY ELECTRICALTHEFT DETERRENT SYSTEM
BE±145
2446 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

Remove the ignition key from key cylinder.
All the doors, engine hood and luggage
compartment door are closed and unlocked.
Any of doors is locked and unlocked by turns
3 times by the key or remote control.
Driver's side knob for door lock is locked and
unlocked 3 times.
Driver's side door is opened.
The system starts force lock at once after 2
sec.
Driver's side knob for door lock is unlocked.
Driver's side door is closed and opened 2
times
Driver's side knob for door lock is locked and
unlocked.
The system starts force lock at once after 2
secs.
PASSIVE MODE OFF
Driver's side door is closed and opened 4
times
Driver's side knob for door lock is locked and
unlocked.
The system starts force lock at once after 2
sec.
PASSIVE MODE ON
Within
30 sec.
Within
20 sec.
HINT:

Initial mode is PASSIVE MODE OFF.

If there is a different signal in the middle of changing. It is invalid.
Input to the vehicle
Output from the vehicle BE±148
± BODY ELECTRICALTHEFT DETERRENT SYSTEM
2449 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
6. CHANGING METHOD OF PASSIVE MODE
(ON or OFF)

BE0GR±04
I04055
2 5
I04146
I04147
Not turned
UNLOCK
I04148
ON OFF BE±150
± BODY ELECTRICALTHEFT DETERRENT SYSTEM
2451 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. INSPECT THEFT DETERRENT INDICATOR LIGHT OP-
ERATION
Connect the positive (+) lead from the battery terminal 2 and
negative (±) lead to terminal 5, and check that the warning light
lights up.
If operation is not as specified, replace the light control rheostat.
2. INSPECT THEFT DETERRENT INDICATOR LIGHT
CIRCUIT
(See page DI±808)
3. INSPECT THEFT DETERRENT HORN OPERATION
Connect the positive (+) lead from the battery to the terminal 1
and negative (±) lead to theft deterrent horn body, and check
that the theft deterrent horn blows.
If operation is not as specified, replace the horn.
4. INSPECT THEFT DETERRENT HORN CIRCUIT
(See page DI±804)
5. INSPECT LUGGAGE COMPARTMENT DOOR KEY
LOCK AND UNLOCK SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
Not turned±No continuity
UNLOCK1 ± 2Continuity
If continuity is not as specified, replace the switch.
6. INSPECT LUGGAGE COMPARTMENT DOOR KEY
LOCK AND UNLOCK SWITCH CIRCUIT
(See page DI±794)
7. INSPECT ENGINE HOOD COURTESY SWITCH CON-
TINUITY
Switch positionTester connectionSpecified condition
LOCK±No continuity
UNLOCK1 ± 2Continuity
If continuity is not as specified, replace the switch.
8. INSPECT ENGINE HOOD COURTESY SWITCH CIR-
CUIT
(See page DI±790)

BE0H5±06
I01348
Engine Room No.1
Junction BlockEngine Room No.2
Relay Block
Driver Side Junction BlockEngine Room No.3
Relay Block
Passenger Side Junction Block
BE±16
± BODY ELECTRICALPOWER SOURCE
2317 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
POWER SOURCE
LOCATION
The vehicle shown in this illustration is ºGS400º.
All components of ºGS300º other than the ones used for engine are same as ºGS400º.

I04026

Engine Room No.1 Junction Block
Fuses Relays
1. MAIN H±Fuse
2. FL ABS NO.1 H±Fuse
3. ALT H±Fuse
4. ABS NO.2 H±Fuse
5. H±LP CLN H±Fuse
6. RAD NO.1 Fuse
7. ALT±S Fuse
8. EFI Fuse
9. TURN HAZ Fuse
10. TEL Fuse
11. AM2 Fuse
13. HORN Fuse 12. ETCS Fuse
14. MPX±B Fuse
15. ECU±B1 Fuse
16. HTR FuseB. Starter Relay A. Headlight Control Relay
C. EFI Relay
17. FAN MAIN H±Fuse
18. CDS FAN H±Fuse
20. H±LP R LWR Fuse 19. RAD FAN H±Fuse
21. H±LP L LWR Fuse
22. H±LP R UPR Fuse
23. H±LP L UPR Fuse1
2 3 4 5 6 7 8 9 10 11 12 13
14 15
16 18 17 19
20 21 22 23 A
BC
± BODY ELECTRICALPOWER SOURCE
BE±17
2318 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)