LEXUS GS400 2000 Service Repair Manual

SF0OB±03
B08325
Bank 1 Sensor 1
N´m (kgf´cm, ft´lbf): Specified torque
Heated Oxygen Sensor Connector
(On Water Pump)
Clamp
45 (450, 33)Heated Oxygen Sensor
B08326
Bank 1 Sensor 2
N´m (kgf´cm, ft´lbf) : Specified torque
Heated Oxygen Sensor Connector
Case Clamp
Front Suspension Member Brace
45 (450, 33)Heated Oxygen Sensor
SF±64
± SFI (2JZ±GE)HEATED OXYGEN SENSOR
1530 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
HEATED OXYGEN SENSOR
COMPONENTS

B08327
Bank 2 Sensor 1
N´m (kgf´cm, ft´lbf) : Specified torquePCV Hose
PS Air Hose
Air Cleaner Inlet
Wire Grommet EVAP Hose
Heated Oxygen Sensor
(Bank 2 Sensor 1)

Gasket Air Cleaner,
MAF Meter and
Intake Air Resonator
Assembly
MAF Meter Connector
Front Exhaust
Pipe

Gasket Engine Wire Clamp
Heated Oxygen Sensor
Connector
Case Clamp

Clamp
Pipe Support Bracket
Heated Oxygen Sensor Connector

Non±reusable part
44 (440, 32)
40 (408, 30)
44 (440, 32)
Exhaust Manifold
x 8
Engine Cover
± SFI (2JZ±GE)HEATED OXYGEN SENSOR
SF±65
1531 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

B02815
Heated Oxygen Sensor Connector
Under CoverFloor Carpet
Wire Grommet
Heated Oxygen Sensor
45 (450, 33)
N´m (kgf´cm, ft´lbf): Specified torque Bank 2 Sensor 2 SF±66
± SFI (2JZ±GE)HEATED OXYGEN SENSOR
1532 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

SF0OC±04
B08610
Ohmmeter
+B
HT
B02065
+B
HTOhmmeter
± SFI (2JZ±GE)HEATED OXYGEN SENSOR
SF±67
1533 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. INSPECT HEATER RESISTANCE OF HEATED
OXYGEN SENSORS (BANK 1, 2 SENSOR 1 AND
BANK 1 SENSOR 2)
(a) Disconnect the oxygen sensor connectors.
(b) Using an ohmmeter, measure the resistance between the
terminals +B and HT.
Resistance: 11 ± 16 W at 20°C (68°F)
If the resistance is not as specified, replace the sensor.
Torque: 45 N´m (450 kgf´cm, 33 ft´lbf)
(c) Reconnect the oxygen sensor connectors.
2. INSPECT HEATER RESISTANCE OF HEATED
OXYGEN SENSOR (BANK 2 SENSOR 2)
(a) Take out the front side of the floor carpet.
(b) Disconnect the oxygen sensor connector.
Using an ohmmeter, measure the resistance between the
terminals +B and HT.
Resistance: 11 ± 16 W at 20°C (68°F)
If the resistance is not as specified, replace the sensor.
Torque: 45 N´m (450 kgf´cm, 33 ft´lbf)
(c) Reconnect the oxygen sensor connector.
(d) Reinstall the floor carpet.
3. INSPECT OPERATION OF HEATED OXYGEN SEN-
SOR (See page DI±44)

SF0OD±01
B01370
Fuel Pump ECU
Luggage Compartment
Trim Cover
Fuel Pump Connector
SF±68
± SFI (2JZ±GE)FUEL PUMP ECU
1534 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
FUEL PUMP ECU
COMPONENTS

SF0OE±01
± SFI (2JZ±GE)FUEL PUMP ECU
SF±69
1535 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. REMOVE FUEL PUMP ECU
2. INSPECT FUEL PUMP ECU (See page DI±150)
3. REINSTALL FUEL PUMP ECU

SF0OF±01
B01872
ECM Hood
ECM Cover
ECM Connector
ECM
SF±70
± SFI (2JZ±GE)ENGINE CONTROL MODULE (ECM)
1536 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
ENGINE CONTROL MODULE (ECM)
COMPONENTS

SF0OG±01
± SFI (2JZ±GE)ENGINE CONTROL MODULE (ECM)
SF±71
1537 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. REMOVE ECM
2. INSPECT ECM (See page DI±20)
3. REINSTALL ECM

SF0OH±03
B01982
LEXUS
Hand±Held
Tester
B01568
Sound Scope
SF±72
± SFI (2JZ±GE)FUEL CUT RPM
1538 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
FUEL CUT RPM
INSPECTION
1. WARM UP ENGINE
Allow the engine to warm up to normal operating temperature.
2. CONNECT LEXUS HAND±HELD TESTER OR OBDII
SCAN TOOL
(a) Connect the LEXUS hand±held tester or OBDII scan tool
to the DLC3.
(b) Please refer to the LEXUS hand±held tester or OBDII
scan tool operator's manual for further details.
3. INSPECT FUEL CUT±OFF OPERATION
(a) Increase the engine speed to at least 3,000 rpm.
(b) Check for injector operating noise.
(c) Check that when the throttle lever is released, injector op-
eration noise stops momentarily and then resumes.
HINT:
Measure with the A/C OFF.
Fuel return rpm: 1,000 rpm
4. DISCONNECT LEXUS HAND±HELD TESTER OR
OBDII SCAN TOOL

SF0N3±02
B01873
Rear Seat Cushion
Floor Service Hole Cover
Fuel Pump & Sender Gauge
Connector
Fuel Tank Vent Tube
Set PlateFuel Tank Main Tube
Tube Joint Clip
Fuel Pump and Sender Gauge
Assembly
Fuel Sub Suction Hose

Non±reusable part

Gasket
x 8
N´m (kgf´cm, ft´lbf): Specified torque
3.5 (36, 31 in.´lbf)
± SFI (2JZ±GE)FUEL PUMP
SF±9
1475 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
COMPONENTS