Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 111

IG(STI)-8

Ignition Coil

IGNITION

STARTING/CHARGING SYSTEMS

SC(STI)

Page

1.

General Description . . . . . . . . . . . . . . . . . . . . ...2

2.

Starter . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.

Generator . . . . . . . . . . . . . . . . . . . . . . . . .21

4.

Battery . . . . . . . . . . . . . . . . . . . . . . . . . ..27

SC(STI)-2

General Description

STARTING/CHARGING SYSTEMS

1. General Description

A: SPECIFICATION

Item

Specifications

Vehicle model

6MT

5MT

Starter

Type

Reduction type

Model

428000-5760

M000T30475

Manufacturer

DENSO

Mitsubishi Electric

Voltage and output

12 V — 1.0 kW

Direction of rotation

Counterclockwise (when observed from pinion)

Number of pinion teeth

9

8

Armature commu-
tator runout

Standard

0.05 mm (0.0020 in)

0.05 mm (0.0020 in)

Limit

0.10 mm (0.0039 in)

0.10 mm (0.0039 in)

Armature depth of
segment mold

Standard

0.5 mm (0.020 in)

0.5 mm (0.020 in)

Brush length

Standard

12.3 mm (0.484 in)

12.3 mm (0.484 in)

Limit

7.0 mm (0.276 in)

7.0 mm (0.276 in)

Brush spring force

Standard

15.9 — 19.5 N

(1.62 — 1.99 kgf, 3.57 — 4.38 lbf)

15.9 — 19.5 N

(1.62 — 1.99 kgf, 3.57 — 4.38 lbf)

Limit

2.5 N (0.25 kgf, 0.56 lbf)

2.5 N (0.25 kgf, 0.56 lbf)

No-load
characteristics

Voltage

11 V

11 V

Current

90 A or less

95 A or less

Rotating speed

2,860 rpm or more

2,500 rpm or more

Load
characteristics

Voltage

8 V

7.5 V

Current

280 A

300 A

Torque

9.3 N·m (0.9 kgf-m, 6.9 ft-lb) or more

8.84 N·m (0.9 kgf-m, 6.5 ft-lb) or more

Rotating speed

860 rpm or more

870 rpm or more

Lock
characteristics

Voltage

4 V

4 V

Current

515 A or less

680 A or less

Torque

16 N·m (1.6 kgf-m, 11.8 ft-lb) or more

17 N·m (1.7 kgf-m, 12.5 ft-lb) or more

Generator

Type

Rotating-field three-phase type, voltage regulator built-in type, with load

response control system

Model

A3TG6591

Manufacturer

Mitsubishi Electric

Voltage and output

12 V — 110 A

Polarity on ground side

Negative

Direction of rotation

Clockwise (when observed from pulley side)

Stator connection

3-phase

type

Output current

1,500 rpm — 50 A or more
2,500 rpm — 91 A or more

5,000 rpm — 105 A or more

Regulated voltage

14.1 — 14.8 V [20°C (68°F)]

Rotor slip ring
outer diameter

Standard

22.7 mm (0.894 in)

Limit

22.1 mm (0.870 in)

Brush length

Standard

18.5 mm (0.728 in)

Limit

5.0 mm (0.197 in)

Battery

Type and capacity

12 V — 48 AH (55D23L)

12 V — 48 AH (55D23L)

CCA

356 A

356 A

SC(STI)-3

General Description

STARTING/CHARGING SYSTEMS

B: COMPONENT

1. STARTER

• STI model

(1)

Starter housing ASSY

(9)

Pinion gear

(17) Magnet switch ASSY

(2)

Snap ring

(10) Starter plate

(3)

Stopper

(11) Armature

Tightening torque: N·m (kgf-m, ft-lb)

(4)

Overrunning clutch

(12) Yoke ASSY

T1: 1.4 (0.1, 1.0)

(5)

Snap ring

(13) Brush holder ASSY

T2: 6 (0.6, 4.4)

(6)

Washer

(14) Starter cover ASSY

T3: 7.5 (0.8, 5.5)

(7)

Internal gear ASSY

(15) Drain duct

T4: 10 (1.0, 7.4)

(8)

Shaft

(16) Shift lever

SC-02448

(12)

(13)

T1

T3

T4

T2

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

(14)

(15)

(16)

(17)