2000 LEXUS GS400 engine coolant

PP0O2±02
± PREPARATIONBODY ELECTRICAL
PP±93
145 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
EQUIPMENT
Voltmeter
Ammeter
Ohmmeter
Test lead
ThermometerEngine coolant temperature sender gauge, Engine oil level warn-
ing switch, Seat heater
SyphonBrake fluid level warning switch
Oil bathEngine oil level warning switch
Bulb (1.4 W)Defogger switch
Bulb (3.4 W)Fuel sender gauge, Engine coolant temperature receiver gauge,
Seat belt warning relay
Dry cell batteryFuel sender gauge, Power mirror
Heat lightSeat heater
Hexagon wrench (6 mm)Power seat
Torque wrench
Clip removerFor removing cowl louver
Masking tapeRear window defogger wire
Tin foilRear window defogger wire

± SERVICE SPECIFICATIONSBODY ELECTRICAL
SS±61
217 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)Standard indication (mph)
Allowable range (mph)
2018 ± 24
4038 ± 44
6056 ± 66
8078 ± 88
10098 ± 110
120118 ± 132
CANADA:
Standard indication (km/h)Allowable range (km/h)
2017 ± 24
4038 ± 46
6057.5 ± 67
8077 ± 88
10096 ± 109
120115 ± 130
160134 ± 151.5
SpeedometerResistance (W)
A ± B140 ± 185 W
C ± D130 ± 175 W
TACHOMETER (ON±VEHICLE)/ DC 13.5 V 25 °C at (77 °F)
Standard indicationAllowable range
700630 ± 770
1,000900 ± 1,100
2,0001,850 ± 2,150
3,0002,800 ± 3,200
4,0003,800 ± 4,200
5,0004,800 ± 5,200
6,0005,750 ± 6,250
7,0006,700 ± 7,300
TachometerResistance (W)
A ± B140 ± 185 W
C ± D130 ± 175 W
FUEL RECEIVER GAUGEResistance (W)
A ± B140 ± 185 W
C ± D130 ± 175 W
FUEL MAIN SENDER GAUGE
Float position mm (in.)Resistance (W)
F: Approx. 34.6 (1.36) ± 3 (0.12)Approx. 2.0 ± 1.0
1/2: Approx. 52.4 (2.06) ± 3 (0.12)Approx. 26.1 ± 3.0
E: Approx. 134.9 (5.31) ± 3 (0.12)Approx. 48..7 ± 1.0
FUEL SUB SENDER GAUGE
Float position mm (in.)Resistance (W)
F: Approx. 9.5 (0.37) ± 3 (0.12)Approx. 2.0 ± 1.0
1/2: Approx. 110.5 (4.35) ± 3 (0.12)Approx. 33.0 ± 3.0
E: Approx. 206.5 (8.13) ± 3 (0.12)Approx. 61.3 ± 1.0
ENGINE COOLANT TEMPERATURE RECEIVER GAUGE (Resistance)Resistance (W)

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

SF0NN±05
B01615
B01616
Forward
Down±Side
Diagonal(2) (1)
SF±36
± SFI (2JZ±GE)THROTTLE BODY
1502 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. DRAIN ENGINE COOLANT
2. REMOVE ENGINE COVER
Remove the 4 nuts and engine cover.
3. REMOVE INTAKE AIR RESONATOR
4. REMOVE THROTTLE BODY BRACKET AND
THROTTLE BODY
(a) Disconnect the accelerator cable.
(b) Disconnect the throttle position sensor connector.
(c) Disconnect the throttle control motor connector.
(d) Disconnect the accelerator pedal position sensor con-
nector.
(e) Disconnect the engine wire clamp from the clamp bracket
of throttle body.
(f) Remove the 2 bolts and nut holding the throttle body to
the intake air connector.
Torque: 21 N´m (210 kgf´cm, 15 ft´lbf)
(g) Remove the 4 nuts and throttle body bracket.
Torque: 21 N´m (210 kgf´cm, 15 ft´lbf)
(h) Slightly slide the throttle body away from the intake air
connector.
NOTICE:
When putting up the throttle body, do not hold the motor
part.
(i) Disconnect the 2 water bypass hoses from the throttle
body, and remove the throttle body.
HINT:

At the time of installation, please refer to the following
items.

Connect the water bypass hose with its discrimination
mark downward.

Install the with its craw direction for (1) forward and down±
side diagonal (engine side about 45°) for (2).

SF0O5±01
B02006
Non±reusable partECT Sensor Connector
ECT Sensor
Gasket
SF±58
± SFI (2JZ±GE)ENGINE COOLANT TEMPERATURE (ECT) SENSOR
1524 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
COMPONENTS

SF0O6±01
B01944
SST
Z02917
Ohmmeter
Acceptable
RESISTANCE KW
TEMPERATURE °C (°F)
± SFI (2JZ±GE)ENGINE COOLANT TEMPERATURE (ECT) SENSOR
SF±59
1525 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. DRAIN ENGINE COOLANT
2. REMOVE ECT SENSOR
(a) Disconnect the ECT sensor connector.
(b) Using SST, remove the ECT sensor and gasket.
SST 09205±76030
3. INSPECT ECT SENSOR
Using an ohmmeter, measure the resistance between the ter-
minals.
Resistance: Refer to the graph
If the resistance is not as specified, replace the ECT sensor.
4. REINSTALL ECT SENSOR
(a) Install a new gasket to the ECT sensor.
(b) Using SST, install the ECT sensor.
SST 09205±76030
Torque: 19.6 N´m (200 kgf´cm, 14 ft´lbf)
(c) Connect the ECT sensor connector.
5. REFILL WITH ENGINE COOLANT