Lexus ES300 (2002 year). Manual — part 137

ENGINE – 1MZ-FE ENGINE

EG-39

208EG44

Accelerator Pedal
Position Sensor

Throttle Valve

Throttle Position Sensor

Throttle
Control
Motor

Skid
Control
ECU

ECM

Mass Air
Flow Meter

Ignition
Coil

Fuel
Injector

8. ETCS-i (Electronic Throttle Control System-intelligent)

General

In the conventional throttle body, the throttle valve opening in determined invariably by the amount of

the accelerator pedal effort. In contrast, the ETCS-i uses the ECM to calculate the optimal throttle valve
opening that is appropriate for the respective driving condition and uses a throttle control motor to control
the opening.

The accelerator cable and link have been discontinued, and an a accelerator position sensor has been pro-

vided on the accelerator pedal.

System Diagram

ENGINE – 1MZ-FE ENGINE

EG-40

Operation

1) General

The ECM drives the throttle control motor by determining the target throttle valve opening in accordance
with the respective vehicle operating condition.

Idle Speed Control
Shift Shock Reduction Control
Cruise Control

2) Idle Speed Control

Controls the ECM and the throttle valve in order to constantly effect ideal idle speed control.

3) Shift Shock Reduction Control

The throttle control is synchronized to the ECT (Electronically Controlled Transmission) control during
the shifting of the transmission in order to reduce the shift shock.

4) TRAC Throttle Control

As part of the TRAC system, the throttle valve is closed by a demand signal from the skid control ECU
if an excessive amount of slippage is created at a driving wheel, thus facilitating the vehicle in ensuring
stability and driving force.

5) VSC Coordination Control

In order to bring the effectiveness of the VSC system control into full play, the throttle valve opening
angle is controlled by effecting a coordination control with the skid control ECU.

6) Cruise Control

An ECM with an integrated cruise control ECU directly actuates the throttle valve to effect the operation
of the cruise control.

ENGINE – 1MZ-FE ENGINE

EG-2

ENGINE

211EG01

211EG02

1MZ-FE ENGINE

DESCRIPTION

The 1MZ-FE engine, which is a V6, 3.0-liter, 24-valve DOHC engine, based on the 1MZ-FE engine on the
’01 ES300.
This engine has following features that have been newly adopted in order to realize the further improvement
of the engine performance, fuel economy and to reduce exhaust emissions.

The PS (Planetary reduction Segment conductor motor) starter has been adopted.
Meets the ULEV (Ultra Low Emission Vehicle) regulation requirements.
Meets the SFTP (Supplementary Federal Test Procedure) regulation requirements.
ETCS-i (Electronic Throttle Control System-intelligent) has been adopted.
VVT-i (Variable Valve Timing-intelligent) system is used.
Air intake control system has been adopted.

ENGINE – 1MZ-FE ENGINE

EG-3

211EG03

N

.

m (ft

.

lbf)

300

260

220

230

190

150

Torque

(HP) kW

220

180

140

100

60

20

160

120

80

40

0

Output

1000

3000

5000

7000

Engine Speed (rpm)

: Intake Valve Opening Angle
: Exhaust Valve Opening Angle

VVT-i Operation

Angle

2

4

236

56

236

60

VVT-i Operation

Angle

0

BDC

54

211EG04

TDC

Engine Specification

Model

’02 ES300

’01 ES300

No. of Cyls. & Arrangement

6-Cylinder, V Type

Valve Mechanism

24-Valve DOHC,

Belt & Gear Drive

Combustion Chamber

Pentroof Type

Manifolds

Cross-Flow

Fuel System

SFI

Displacement

cm

3

(cu. in.)

2995 (182.8)

Bore x Stroke

mm (in.)

87.5 x 83.0 (3.44 x 3.27)

Compression Ratio

10.5 : 1

Max. Output

(SAE-NET)

156 kw @ 5800 rpm

(210 HP @ 5800 rpm)

Max. Torque

(SAE-NET)

298 N

.

m @ 4400 rpm

(220 lb

.

ft @ 4400 rpm)

Intake

Open

– 4

56 BTDC

Valve

Intake

Close

60

0 ABDC

Valve
Timing

Exhaust

Open

54

BBDC

g

Exhaust

Close

2

ATDC

Firing Order

1-2-3-4-5-6

Research Octane Number

96 or higher

Octane Rating

91 or higher

Dry Weight

kg (lb)

157 (346)

—

Oil Grade

API SJ, SL , EC or ILSAC

API SH, SJ , EC or ILSAC

Performance Curve

Valve Timing