Lexus SC300 / Lexus SC400. Manual - part 723

STARTING SYSTEM

STARTING SYSTEM

NOTE: The specification descriptions ”USA Spec.” and
”Exc. USA Spec.” used in this section indicate the following
specifications.
USA Spec.: USA (50 States) Specifications
Exc. USA Spec.: USA (except California) and Canadian
Specifications.

ST–1

DESCRIPTION

The starter is a reduction type starter with a small, high–speed motor used to drive the pinion gear. It is

installed in the center of the V–bank of the cylinder block.

ST–2

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STARTING SYSTEM

Description

SYSTEM CIRCUIT

OPERATION

When the ignition switch is turned to START, current flows from terminal 50 to the coil of the solenoid and

the plunger is pulled by the magnetic force of the coil. When the plunger is pulled to the left as shown above,
the contact plate of the plunger allows current from the battery to flow directly from terminal 30 to the motor, and
the starter rotates.

When the engine is running and the ignition switch is returned to ON, the magnetic force of the coil disappears

and the contact plate of the plunger is returned to its original position by the return spring. Battery voltage no
longer flows from terminal 30, so the motor stops.

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STARTING SYSTEM

System Circuit, Operation

ST–3

PREPARATION

SST (SPECIAL SERVICE TOOLS)

09201–41020

Valve Stem Oil
Seal Replacer

Armature rear bearing

09286–46011

Injection Pump
Spline Shaft Puller

Armature front bearing

09612–24014

Steering Gear
Housing Overhaul
Tool Set

(09617–24011)

(Steering Rack
Wrench)

Fuel Inlet hose

09950–00020

Bearing Remover

Armature rear bearing

RECOMMENDED TOOLS

09082–00015

TOYOTA 
Electrical Tester

EQUIPMENT

Part Name

Note

Dial indicator

Commutator

Vernier caliper

Commutator, Brush

Pull scale

Brush spring

Torque wrench

ST–4

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STARTING SYSTEM

Preparation