Subaru IMPREZA 2002 Service Manual page 242

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DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
ABS (DIAGNOSTICS)
Step
3 CHECK CONTAMINATION OF ABS SENSOR
OR TONE WHEEL.
Remove the disc rotor from hub.
IO
CHECK DAMAGE OF ABS SENSOR OR
TONE WHEEL.
I1 CHECK TONE WHEEL RUNOUT.
Measure the tone wheel runout.
1 2
CHECK ABSCM&H/U
.
1)Turn the ignition switch to OFF.
2)Connect all connectors.
3)Erase the memory.
4)Perform the inspection mode.
5)Read out the diagnostic trouble code.
1 3 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES APPEARANCE.
Check
s the ABS sensor piece or the
one wheel contaminated by
lirt or other foreign matter?
4re there broken or damaged
eeth in the ABS sensor piece
)r the tone wheel?
s the runout less than 0.05
nm (0.0020 in)?
s the same diagnostic trouble
;ode as in the current diagno-
;is still being output?
4re other diagnostic trouble
;odes being output?
Yes
Thoroughly
remove dirt or
other foreign mat-
ter.
Replace the ABS
sensor or tone
wheel. Front: <Ref.
to ABS-1 4, Front
ABS Sensor.>
Rear: <Ref. to
ABS-18, Rear
ABS Sensor.>
and Front: <Ref.
to ABS-21, Front
Tone Wheel.>
Rear: <Ref. to
ABS-22, Rear
Tone Wheel.>
Go to step 12.
Replace the
ABSCM&H/U.
<Ref. to ABS-7,
ABS Control Mod-
ule and Hydraulic
Sontrol Unit
[ABSCM&H/U).>
Proceed with the
diagnosis corre-
sponding to the
diagnostic trouble
:ode.
No
30 to step 10.
30 to step 11.
3eplace the tone
Nheel. Front:
:Ref. to ABS-21,
3ont Tone
Nhee1.z Rear:
:Ref. to ABS-22,
3ear Tone
N h e e b
30
to step 13.
4 temporary poor
:ontact.
ABS-56