Subaru IMPREZA 2002 Service Manual page 306

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (DIAGNOSTICS)
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
i r the tone wheel?
~~ ~~ ~ ~~~~ ~~~
Step
I
CHECK ABS SENSOR SIGNAL.
1)Raise all four wheels of ground.
2)Turn the ignition switch OFF.
3)Connect the oscilloscope to the connector
(B99), (F95) or (F94) in accordance with trou-
ble code.
4)Turn the ignition switch ON.
5)Rotate the wheels and measure voltage at
specified frequency. <Ref. to ABS-17, WAVE-
FORM, Control Module I/O Signal.>
NOTE:
When this inspection is completed, the AB
SCM&H/U sometimes stores the DTC 29.
Connector & terminal
Front RH
Front LH
Rear RH
Rear LH
(F95) NO. 1 (+)
-
NO. 2 (-):
(F94) NO. 1 (+)
-
NO. 2
( - ) I
(699) NO. 9 (+)
-
NO. 10
( - ) I
(699) NO. 4 (+)
-
NO. 5 (-):
I
CHECK CONTAMINATION OF ABS SENSOR
OR TONE WHEEL.
Remove the disc rotor from hub.
Thoroughly
remove dirt or
other foreign mat-
ter.
Replace the ABS
sensor or tone
wheel. Front: <Ref.
to ABS-14, 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.>
0
CHECK DAMAGE OF ABS SENSOR OR
TONE WHEEL.
s the same diagnostic trouble Replace the
:ode as in the current diagno- ABSCM&H/U.
;is still being output?
<Ref. to ABS-7,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
ire other diagnostic trouble Proceed with the
:odes being output? diagnosis corre-
sponding to the
diagnostic trouble
code.
1 CHECK TONE WHEEL RUNOUT.
Measure the tone wheel runout.
Go to step 13.
A temporary poor
contact.
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.
3 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE
CODES APPEARANCE.
3 s shown in the figure?
I
No
; o to step
9.
30 to step 10.
so to step 11.
nm (0.0020 in)? wheel. Front:
<Ref. to ABS-21,
Front Tone
Wheel.> Rear:
<Ref. to ABS-22,
Rear Tone
Wheel.>