Lexus SC300 / Lexus SC400. Manual - part 625

4. 

REMOVE CUP HOLDER
Using a screwdriver, pry out the rear side of the cup holder.
Remove the cup holder.

5. 

REMOVE UPPER REAR CONSOLE PANEL
Using a screwdriver, pry out the console panel.

6. 

REMOVE UPPER CONSOLE PANEL
(a)  Remove the six mounting screws.
(b)  Using a screwdriver, pry out the console panel.

7. REMOVE 

RADIO

(a)  Remove the five mounting bolts.
(b)  Disconnect the wiring connectors and antenna cable,

and remove the radio.

8. 

DISCONNECT SUB–OXYGEN SENSOR CONNECTORS

FI–119

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

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)

Fuel pump ECU

COMPONENTS FOR REMOVAL AND
INSTALLATION

FI–122

                                                –   Electronic Control System (Fuel Pump ECU)

EFI SYSTEM