Lexus LS400 (2000 year). Service manual - part 71

EC03Y–02

B01074

Front Exhaust Pipe

LH TWC

 Gasket

 Gasket

RH TWC

 Gasket

 Gasket

 Non–reusable part

61.8 (630, 46)

61.8 (630, 46)

43.1 (440, 32)

43.1 (440, 32)

N·m (kgf·cm, ft·lbf)

: Specified torque

EC–12

–

EMISSION CONTROL

THREE–WAY CATALYTIC CONVERTER (TWC) 
SYSTEM

1314

THREE–WAY CATALYTIC CONVERTER (TWC) SYSTEM

COMPONENTS

EC03Z–01

–

EMISSION CONTROL

THREE–WAY CATALYTIC CONVERTER (TWC) 
SYSTEM

EC–13

1315

INSPECTION

1.

CHECK EXHAUST PIPE ASSEMBLY

(a)

Check the connections for looseness or damage.

(b)

Check the clamps for weak ness, cracks or damage.

2.

INSPECT TWC

Check for dents or damage.
If any part of protector is damaged or dented to the extent that it contacts the TWC, repair or replace it.
3.

INSPECT HEAT INSULATOR

(a)

Check the heat insulator for damage.

(b)

Check for adequate clearance between the TWC and heat insulator.

EC040–02

P21361

Touch

B

A

Tighten

Protrusion

Hole

New 
Gasket

Hollow

Front

EC–14

–

EMISSION CONTROL

THREE–WAY CATALYTIC CONVERTER (TWC) 
SYSTEM

1316

INSTALLATION

CONNECT FRONT AND CENTER EXHAUST PIPES
HINT:

Install a new gasket to the exhaust pipe in the correct
direction.

Fit together the clamp protrusion and pipe hollow, and
tighten the clamp bolt until A and B of the clamp are just
touching.

EC03U–03

B10157

VSV for Canister 
Closed Valve (CCV)

VSV for EVAP

PCV Valve

EVAP Service Port

TWC

Vapor Pressure Sensor

Cut Off Valve

Fill Check Valve

Vent Line

Air Drain Hose

Charcoal Canister

VSV for Pressure 
Switching Valve

Air Inlet Line

Purge Line

EVAP Line

Fuel Vapor Feed Pipe

EC–2

–

EMISSION CONTROL

PARTS LAYOUT AND SCHEMATIC DRAWING

1304

PARTS LAYOUT AND SCHEMATIC DRAWING

LOCATION