2000 LEXUS GS400 Service Repair Manual

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