Lexus SC300 / Lexus SC400. Manual — part 494

9. INSPECT

HEATER

RESISTANCE OF SUB–OXYGEN

SENSORS
Using an ohmmeter, measure the resistance between the ter-
minals +B and HT.

Resistance: 5.1–6.3

at 20

°

C (68

°

F)

If the resistance is not as specified, replace the sensor as
follows:

•

Disconnect the grommet from the floor panel, and
pull out the wire of the sub–oxygen sensor from the
floor panel.

•

Remove the sub–oxygen sensor.

•

Install a new sub–oxygen sensor.

Torque: 44 N

⋅

m (450 kgf

⋅

cm, 33 ft

⋅

lbf)

•

Run the wire of the sub–oxygen sensor through the
hole in the floor panel.

10. RECONNECT SUB–OXYGEN SENSOR CONNECTORS

11. REINSTALL

RADIO

(a) Connect the wiring connectors and antenna cable.
(b) Install the radio with the five bolts.

12. REINSTALL UPPER REAR CONSOLE PANEL

(a) Fit the console panel to the console box with five clips.
(b) Install the console panel with the six screws.

FI–120

EFI SYSTEM – Electronic Control System (Sub–Oxygen Sensors)

13. REINSTALL UPPER CONSOLE PANEL

Fit the console panel to the console box with the four clips.

14. REINSTALL CUP HOLDER

Fit the cup holder to the console box.

15. REINSTALL TRANSMISSION SHIFT LEVER KNOB

(a) Slide the lever cover on the lever shaft.

(b) Install the shift lever knob with the two screws.

(c) Attach the lever cover to the lower side of the lever knob.

16. RECONNECT CABLE TO NEGATIVE TERMINAL OF

BATTERY

FI–121

EFI SYSTEM – Electronic Control System (Sub–Oxygen Sensors)

Preparation

SST (SPECIAL SERVICE TOOLS)

Illustration

Part No.

Part Name

Note

09268–41045

Injection Measuring
Tool Set

(90268–41070)

No. 4 Union

Injector

(09268–41080)

No. 6 Union

Cold start Injector

(09268–52010)

Injection Measuring
Attachment

Injector

09268–45012

EFI Fuel Pressure
Gauge

09612–24014

Steering Gear
Housing Overhaul
Tool Set

(09617–24011)

Steering Rack Wrench

Fuel pressure pulsation damper

09631–22020

Power Steering
Hose Nut 14 X 17 mm
Wrench Set

Fuel line flare nut

09816–30010

Oil Pressure
Switch Socket

Knock sensor

09842–30055

Wire “G”
EFI Inspection

Cold start Injector

09842–30070

Wire “F”
EFI Inspection

Injector

09843–18020

Diagnosis Check
Wire

0990–01000

Engine Control
Computer
Check Harness “A”

FI–10

– Preparation

EFI SYSTEM

RECOMMENDED TOOLS

Illustration

Part No.

Part Name

Note

09082–0015

TOYOTA
Electrical Tester

09200–00010

Engine Adjust
Kit

09258–00030

Hose Plug Set

Plug for the Vacuum hose, fuel hose ect.

EQUIPMENT

Part Name

Note

Graduated cylinder

Injector

Tachometer

Torque wrench

SSM (SERVICE SPECIAL MATERIALS)

Part Name

Part No.

Use etc.

Seal packing 1282B,

08826–00100

Water inlet housing

Three bond 1282B or equivalent

FI–11

EFI SYSTEM – Preparation