2000 LEXUS GS400 key battery

I04311
I04312
BE±240
± BODY ELECTRICALENGINE IMMOBILISER SYSTEM
2541 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
2. KEY REGISTRATION PROCEDURE WHEN KEY OR KEY CYLINDER HAS BEEN REPLACED.
HINT:
Key registration procedure of new master key and new sub±key on this vehicle when new ignition cylinder
and key set, and new lock cylinder set including ignition key cylinder are installed is described below.
(a) Removing wire±less and immobiliser module from origi-
nal master key.
(b) Making new master key.
After replacing and installing new ignition cylinder, install
the removed original modules into new 2 key housings as
supply parts.
(c) Registration of supplied new sub±key and /or master key
Register supplied new sub±key and /or master key by us-
ing new master key.
(See step 3 and 4)
NOTICE:
In case of replacing ignition cylinder and key set, door
locks cannot be opened with new ignition keys. Therefore,
to avoid any trouble caused by empty battery of transmitter
of new ignition key, please bring the original key while driv-
ing.

BE0H4±04
I01256
1 2 3 4
5 6 7 8 LOCKACC
ON
START
I04031
From Back Side
± BODY ELECTRICALIGNITION SWITCH AND KEY UNLOCK WARNING
SWITCHBE±31
2332 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. INSPECT IGNITION SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
LOCK±No continuity
ACC2 ± 3Continuity
ON2 ± 3 ± 4
6 ± 7Continuity
START1 ± 2 ± 4
6 ± 7 ± 8Continuity
If continuity is not as specified, replace the switch.
2. INSPECT IGNITION SWITCH CIRCUIT
Connect the switch connector and inspect the connector on
wire harness side from the back side, as shown.
Tester connectionConditionSpecified condition
2 ± GroundConstantBattery positive voltage
3 ± GroundIgnition switch ACC or ONBattery positive voltage
4 ± GroundIgnition switch ONBattery positive voltage
6 ± GroundIgnition switch ON or STARTBattery positive voltage
7 ± GroundConstantBattery positive voltage
8 ± GroundIgnition switch STARTBattery positive voltage
If circuit is not as specified, inspect the circuits connected to oth-
er parts.

I04265
I01663
1 2 OFF
ON
3 4
I04032
Wire Harness Side BE±32
± BODY ELECTRICALIGNITION SWITCH AND KEY UNLOCK WARNING
SWITCH
2333 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
3. INSPECT IGNITION KEY ILLUMINATION OPERATION
Connect the positive (+) lead from the battery to terminal 1 and
the negative (±) lead to terminal 2, and check that the indicator
light lights up.
If operation is not as specified, replace the switch.
4. INSPECT IGNITION KEY ILLUMINATION CIRCUIT
(See page DI±843)
5. INSPECT KEY UNLOCK WARNING SWITCH CONTI-
NUITY
Switch positionTester connectionSpecified condition
OFF (Key removed)±No continuity
ON (Key set)1 ± 2Continuity
If continuity is not as specified, replace the switch.
6. INSPECT KEY UNLOCK WARNING SWITCH CIRCUIT
(See page DI±828)
Connect the switch connector and inspect the connector on
wire harness side from the back side, as shown.
Tester connectionConditionSpecified condition
1 ± GroundConstantContinuity
If circuit is not as specified, inspect the circuits connected to oth-
er parts.

SS±62
± SERVICE SPECIFICATIONSBODY ELECTRICAL
218 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)A ± B
140 ± 185 W
C ± D130 ± 175 W
ENGINE COOLANT TEMPERATURE SENDER GAUGE (Resistance)
Temperature °C (°F)Resistance (W)
50 (122.0)160 ± 240
120 (248.0)17.1 ± 21.2
DEFOGGER SWITCH (wire harness side)
A2 ± Ground (Ignition switch position LOCK or ACC)No voltage
A2 ± Ground (Ignition switch position ON)Battery positive voltage
WIRELESS DOOR LOCK CONTROL RECEIVER
(Connector disconnected)
7 ± Ground (Constant)Battery positive voltage
(Connector connected)
3 ± Ground (Ignition switch position OFF, Key removed,
Transmitter OFF " ON)4.5 ± 5.5 V " below 1 V
3 ± Ground (Ignition switch position OFF, Key removed,
Transmitter OFF " ON)4.5 ± 5.5 V " below 1 V
4 ± Ground (Ignition switch position OFF, Key removed,
Transmitter OFF)10 ± 14 V
CD AUTO CHANGER
(Except Nakamichi made)
5 ± Ground (Constant)Battery positive voltage
12 ± Ground (Ignition switch position LOCK)No voltage
12 ± Ground (Ignition switch position ACC or ON)Battery positive voltage
POWER AMPLIFIER
(Except Nakamichi made)
B4 ± Ground (Constant)Battery positive voltage
C12 ± Ground (Ignition switch position LOCK)No voltage
C12 ± Ground (Ignition switch position ACC or ON)Battery positive voltage
RADIO RECEIVER
(Except Nakamichi made)
A4 ± Ground (Constant)Battery positive voltage
A1 ± Ground (Ignition switch position ACC or ON)Battery positive voltage
A1 ± Ground (Ignition switch position LOCK)No voltage
CD AUTO CHANGER
(Nakamichi made)
5 ± Ground (Constant)Battery positive voltage
4 ± Ground (Ignition switch position LOCK)No voltage
4 ± Ground (Ignition switch position ACC or ON)Battery positive voltage
POWER AMPLIFIER
(Nakamichi made)
A2 ± Ground (Constant)Battery positive voltage
A5 ± Ground (Constant)Battery positive voltage
A6 ± Ground (Ignition switch position OFF)Battery positive voltage
A6 ± Ground (Ignition switch position ACC or ON)Battery positive voltage
RADIO RECEIVER