Subaru Legacy 2003 Service Manual page 2883

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (DIAGNOSTICS)
17 CHECK GROUND SHORT OF ABS SENSOR.
1) Turn ignition switch to ON.
2) Measure resistance between ABS sensor
and chassis ground.
Terminal
Front RH No. 1 — Chassis ground:
Front LH No. 1 — Chassis ground:
Rear RH No. 1 — Chassis ground:
Rear LH No. 1 — Chassis ground:
Does the measured value exceed the spec-
ified value?
18 CHECK GROUND SHORT OF HARNESS.
1) Turn ignition switch to OFF.
2) Connect connector to ABS sensor.
3) Measure resistance between ABSCM&H/U
connector terminal and chassis ground.
Connector & terminal
DTC 21 / (F49) No. 11 — Chassis
ground:
DTC 23 / (F49) No. 9 — Chassis ground:
DTC 25 / (F49) No. 14 — Chassis
ground:
DTC 27 / (F49) No. 7 — Chassis ground:
Does the measured value exceed the spec-
ified value?
19 CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in connectors between
ABSCM&H/U and ABS sensor?
20 CHECK ABSCM&H/U.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the DTC.
Is the same DTC still being output?
21 CHECK ANY OTHER DTC APPEARANCE.
Are other DTC being output?
Step Value
1 MΩ
1 MΩ
There is no poor contact.
Same DTC is not indicated.
Other DTC is not indicated.
ABS-92
Yes
Go to step 18. Replace ABS sen-
sor and
ABSCM&H/U.
Front: <Ref. to
ABS-12, Front
ABS Sensor.>
Rear: <Ref. to
ABS-15, Rear
ABS Sensor.>
and <Ref. to ABS-
6, ABS Control
Module and
Hydraulic Control
Unit (ABSCM&H/
U).>
Go to step 19. Repair harness
between
ABSCM&H/U and
ABS sensor.
And replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Go to step 20. Repair connector.
Go to step 21. Replace
ABSCM&H/U.
A temporary poor Proceed with the
contact. diagnosis corre-
sponding to the
NOTE:
DTC.
Check harness
and connectors
between AB-
SCM&H/U and
ABS sensor.
No