1999 SUBARU LEGACY length

5) Ball bearing
Check rear ball bearing. Replace it if it is noisy or
if rotor does not turn smoothly.
B6M0486
2. STATOR
1) Continuity test
Inspect stator coil for continuity between its termi-
nals. When there is no continuity between indi-
vidual terminals, cable is broken. Replace stator
coil.
G6M0078
2) Insulation test
Inspect stator coil for continuity between stator
core and each terminal. If there is continuity,
replace stator coil.
G6M0079
3. BRUSH
Measure brush length. If brush is worn, replace
brush holder assembly.
Brush length ():
Standard
20.5 mm (0.807 in)
Limit
1.5 mm (0.059 in)
B6M0487A
4. DIODE ASSEMBLY
CAUTION:
Never use a high tension insulation tester,
such as a meggar as it will damage diodes with
its high tension.
The diode consists of eight diodes, four each being
located on the positive and negative sides. The
diode is necessary to restrict current flow to one
direction.
Check all diodes, for continuity. If any diode is
faulty, replace diode assembly.
B6M0488A
1) Diodes on ª+º side
Continuity of proper diodes on ª+º side
Terminal N, U, V
and WBAT side
(+) (þ)
(+) ÐContinuity must
not exist.
(þ)Continuity must
exist.Ð
18
6-1[W2C2]SERVICE PROCEDURE
2. Generator

NOTE:
ILength L1 is important in making for easy
removal.
IIt may be necessary to wrap points (A) and (B)
with vinyl tape to prevent them separating while
working.
If they do separate, spark plug socket is left on the
spark plug and it is very difficult to remove.
IAn approximately 250 mm (9.84 in) long exten-
sion is recommended to be connected to ratchet.
IFor spark plug socket, extension and Universal
Joint, it is recommended to use the following tools.
Spark plug socket : PROTO 5020-50
Extension : SNAP-ON FX1
Universal Joint : SNAP-ON FU80B
B6M0568B
9) Set (D) extension and (E) ratchet in turn onto
the connected tools in plug hole, and remove spark
plug using them.
B6M0567B
(A) Spark plug socket 16 mm (5/8 in)
(B) Extension
(C) Universal Joint
(D) Extension
(E) Ratchet
B6M0569A
2. #2 SPARK PLUG
1) Disconnect battery ground cable.
G6M0095
2) Remove battery.
B6M0554
3) Remove #2 spark plug cord by pulling boot, not
cord itself.
B6M0555A
4) For subsequent procedures, refer to the proce-
dure for #1 spark plug.
29
[W3C2]6-1SERVICE PROCEDURE
3. Spark Plug

1. Starter
Trouble Probable cause
Starter does not start.Magnet switch does not operate.
(no clicks are heard.)Magnet switch poor contact or disconti-
nuity of pull-in coil circuit
Improper sliding of magnet switch
plunger
Magnet switch operates.
(clicks are issued.)Poor contact of magnet switch's main
contact point
Layer short of armature
Contaminants on armature commutator
High armature mica
Improper grounding of yoke field coil
Insufficient carbon brush length
Insufficient brush spring pressure
Starter starts but does not crank engine.Failure of pinion gear to engage ring
gearWorn pinion teeth
Improper sliding of overrunning clutch
Improper adjustment of stud bolt
Clutch slippage Faulty clutch roller spring
Starter starts but engine cranks too slowly.Poor contact of magnet switch's main
contact point
Layer short of armature
Discontinuity, burning or wear of arma-
ture commutator
Poor grounding of yoke field coil
Insufficient brush length
Insufficient brush spring pressure
Abnormal brush wear
Starter overruns. Magnet switch coil is a layer short.
38
6-1[K100]DIAGNOSTICS
1. Starter

NOTE:
When measuring voltage, wind a piece of tin foil
around the tip of the tester probe and press the foil
against the wire with your finger.
G6M0136
4) When tester indicates 12 volts when its probe
reaches point ªAº, a broken circuit occurs between
point ªAº and the negative terminal. Slowly move
tester probe toward the negative terminal while
contacting it on heat wire to locate point where
tester indication changes abruptly (0 volts). This is
the point where a broken circuit occurs.
When tester indicates 0 volts when its probe
reaches point ªAº, a broken circuit occurs between
point ªAº and the positive terminal. Locate a point
where tester indication changes abruptly (12 volts)
while slowly moving tester probe toward the posi-
tive terminal.
G6M0137
C: REPAIR
1) Clean broken wire and its surrounding area.2) Cut off slit on (used) thin film by 0.5 mm (0.020
in) width and 10 mm (0.39 in) length.
3) Place the slit on glass along the broken wire,
and deposit conductive silver composition
(DUPONT No. 4817) on the broken portion.
G6M0138
4) Dry out the deposited portion.
5) Inspect the repaired wire for continuity.
26
6-2[W13C0]SERVICE PROCEDURE
13. Rear Window Defogger