Subaru IMPREZA 2002 Service Manual page 293

3
DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (DIAGNOSTICS)
Step
CHECK OUTPUT OF ABS SENSOR USING
SELECT MONITOR.
1)Select "Current data display & Save" on the
select monitor.
2)Read the ABS sensor output corresponding
to the faulty system in the select monitor data
display mode.
CHECK INSTALLATION OF ABS SENSOR.
Tightening torque:
32 N.m (3.3 kgf-m, 24 ft-lb)
CHECK ABS SENSOR GAP.
Measure the tone wheel to ABS sensor piece
gap over entire perimeter of the wheel.
0.3
-
0.8 mm (0.012
-
0.031 in)
0.7
-
1.2 mm (0.028
-
0.047 in)
front wheel
Rear wheel
.CHECK TONE WHEEL RUNOUT.
Measure the tone wheel runout.
CHECK POOR CONTACT IN CONNECTORS.
Turn the ignition switch to OFF.
CHECK ABSCM&HN.
1 )Connect all connectors.
2)Erase the memory.
3)Perform the inspection mode.
4)Read out the diagnostic trouble code.
CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES APPEARANCE.
I
CHECK ABS SENSOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ABS sensor.
3)Measure the resistance of ABS sensor con-
nector terminals.
Terminal
front RH No. 1 -No. 2:
front LH No. 1 -No. 2:
Rear RH No. 1
-
No. 2:
Rear LH No. 1
-
No. 2:
~
Check
Ioes the speed indicated on
he display change in response
3
the speedometer reading
luring acceleration/decelera-
ion when the steering wheel is
I
the straight-ahead position?
ire the ABS sensor installation
,olts tightened securely?
s the gap within the specifica-
ions?
s the runout less than 0.05
nm (0.0020 in)?
s
there poor contact in con-
lectors between ABSCM&H/U
ind ABS sensor?
s
the same diagnostic trouble
:ode as in the current diagno-
;is still being output?
ire other diagnostic trouble
:odes being output?
s
the resistance between 1
ind 1.5 kR?
Yes
30 to step 2.
30 to step 3 .
30 to step 4.
30 to step 5.
3epair the con-
lector.
3eplace the
SBSCM&H/U.
:Ref. to ABS-7,
4BS Control Mod-
Ae and Hydraulic
2ontrol Unit
ABSCM&H/U).>
'roceed with the
jiagnosis corre-
sponding to the
liagnostic trouble
:ode.
30 to step 9.
No
Go to step
8.
Tighten the ABS
sensor installation
bolts securely.
Adjust the gap.
NOTE:
Adjust the gap us
ing spacers (Pal
No. 26755AA000:
If spacers cannc
correct the gap, re
place the wori
sensor or wori
tone wheel.
Replace the tone
wheel. Front:
<Ref. to ABS-21,
Front Tone
Wheel.> Rear:
<Ref. to ABS-22,
Rear Tone
Wheel.>
Go to step 6.
Go to step 7.
A temporary poor
contact.
NOTE:
Check harnes
and connector
between AE
SCM&H/U an
ABS sensor.
Replace the ABS
sensor. Front:
<Ref. to ABS-14,
Front ABS Sen-
sor.> Rear: <Ref.
to ABS-1 8, Rear
ABS Sensor.>
ABS-I 07