Subaru Legacy 2002 Service Manual page 2343

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
ABS (Diagnostics)
No.
10 CHECK GROUND SHORT OF ABS SEN-
SOR.
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:
11 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:
12 CHECK POOR CONTACT IN CONNEC-
TORS.
13 CHECK ABSCM&H/U.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the DTC.
14 CHECK ANY OTHER DTC APPEARANCE.
Step
Is the resistance more than
1 MΩ?
Is the resistance more than
1 MΩ?
Is there poor contact in
connectors between
ABSCM&H/U and ABS
sensor?
Is the same DTC as in the
current diagnosis still being
output?
Are other DTC being out-
put?
ABS-42
Check Yes
Go to step 11.
Go to step 12.
Repair connector.
Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Proceed with the
diagnosis corre-
sponding to the
DTC.
No
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 Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Repair harness
between
ABSCM&H/U and
ABS sensor.
Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Go to step 13.
Go to step 14.
A temporary poor
contact.
NOTE:
Check harness
and connectors
between
ABSCM&H/U and
ABS sensor.