Subaru Legacy 2002 Service Manual page 2348

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
No.
8 CHECK RESISTANCE OF ABS SENSOR.
1) Turn ignition switch OFF.
2) Disconnect connector from ABS sensor.
3) Measure resistance between ABS sensor
connector 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:
9 CHECK GROUND SHORT OF ABS SEN-
SOR.
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:
10 CHECK HARNESS/CONNECTOR
BETWEEN ABSCM&H/U AND ABS SEN-
SOR.
1) Connect connector to ABS sensor.
2) Disconnect connector from ABSCM&H/U.
3) Measure resistance at ABSCM&H/U con-
nector terminals.
Connector & terminal
DTC 22 / (F49) No. 11 — No. 12:
DTC 24 / (F49) No. 9 — No. 10:
DTC 26 / (F49) No. 14 — No. 15:
DTC 28 / (F49) No. 7 — No. 8:
11 CHECK GROUND SHORT OF HARNESS.
Measure resistance between ABSCM&H/U
connector and chassis ground.
Connector & terminal
DTC 22 / (F49) No. 11 — Chassis
ground:
DTC 24 / (F49) No. 9 — Chassis
ground:
DTC 26 / (F49) No. 14 — Chassis
ground:
DTC 28 / (F49) No. 7 — Chassis
ground:
12 CHECK GROUND CIRCUIT OF
ABSCM&H/U.
Measure resistance between ABSCM&H/U
and chassis ground.
Connector & terminal
(F49) No. 23 — GND:
13 CHECK POOR CONTACT IN CONNEC-
TORS.
14 CHECK SOURCES OF SIGNAL NOISE.
Step
Is the resistance between 1
and 1.5 kΩ?
Is the resistance more than
1 MΩ?
Is the resistance between 1
and 1.5 kΩ?
Is the resistance more than
1 MΩ?
Is the resistance less than
0.5 Ω?
Is there poor contact in
connectors between
ABSCM&H/U and ABS
sensor?
Is the car telephone or the
wireless transmitter prop-
erly installed?
ABS-47
Check Yes
Go to step 9.
Go to step 10.
Go to step 11.
Go to step 12.
Go to step 13.
Repair connector.
Go to step 15.
ABS (Diagnostics)
No
Replace ABS sen-
sor. Front: <Ref.
to ABS-12, Front
ABS Sensor.>
Rear: <Ref. to
ABS-15, Rear
ABS Sensor.>
Replace ABS sen-
sor. Front: <Ref.
to ABS-12, Front
ABS Sensor.>
Rear: <Ref. to
ABS-15, Rear
ABS Sensor.>
Repair harness/
connector
between
ABSCM&H/U and
ABS sensor.
Repair harness/
connector
between
ABSCM&H/U and
ABS sensor.
Repair
ABSCM&H/U
ground harness.
Go to step 14.
Properly install
the car telephone
or the wireless
transmitter.