Subaru Impreza 2003 Service Manual page 2464

DIAGNOSTICS PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ABS (DIAGNOSTICS)
Step
9 CHECK CONTAMINATION OF ABS WHEEL
SPEED SENSOR OR TONE WHEEL.
Remove the disc rotor or drum from hub.
10 CHECK DAMAGE OF ABS WHEEL SPEED
SENSOR OR TONE WHEEL.
11 CHECK TONE WHEEL RUNOUT.
Measure the tone wheel runout.
12 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 DTC.
13 CHECK ANY OTHER DTC APPEARANCE.
Check
Is the ABS wheel speed sen-
sor piece or tone wheel con-
taminated by dirt or other
foreign matter?
Are there broken or damaged
teeth in the ABS wheel speed
sensor piece or tone wheel?
Is the runout less than 0.05
mm (0.0020 in)?
Is the same DTC as in the cur-
rent diagnosis still being out-
put?
Are other DTCs being output? Proceed with the
ABS-124
Yes
Thoroughly Go to step 10.
remove dirt or
other foreign mat-
ter.
Replace the ABS Go to step 11.
wheel speed sen-
sor or tone wheel.
Front: <Ref. to
ABS-13, Front
ABS Wheel Speed
Sensor.> Rear:
<Ref. to ABS-16,
Rear ABS Wheel
Speed Sensor.>
and Front: <Ref. to
ABS-19, Front
Tone Wheel.>
Rear: <Ref. to
ABS-20, Rear
Tone Wheel.>
Go to step 12. Replace the tone
wheel. Front:
<Ref. to ABS-19,
Front Tone
Wheel.> Rear:
<Ref. to ABS-20,
Rear Tone
Wheel.>
Replace the Go to step 13.
ABSCM&H/U.
<Ref. to ABS-7,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
A temporary poor
diagnosis corre- contact.
sponding to DTC.
No