Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 111
IG(STI)-8
Ignition Coil
IGNITION
STARTING/CHARGING SYSTEMS
SC(STI)
Page
General Description . . . . . . . . . . . . . . . . . . . . ...2
Starter . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Generator . . . . . . . . . . . . . . . . . . . . . . . . .21
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)
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