Subaru Legacy 2002 Service Manual page 2401

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (Diagnostics)
No.
16 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:
17 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:
18 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:
19 CHECK GROUND CIRCUIT OF
ABSCM&H/U.
Measure resistance between ABSCM&H/U
and chassis ground.
Connector & terminal
(F49) No. 23 — GND:
20 CHECK POOR CONTACT IN CONNEC-
TORS.
21 CHECK SOURCES OF SIGNAL NOISE.
22 CHECK SOURCES OF SIGNAL NOISE.
Step
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?
Are noise sources (such as
an antenna) installed near
the sensor harness?
ABS-100
Check Yes
Go to step 17.
Go to step 18.
Go to step 19.
Go to step 20.
Repair connector.
Go to step 22.
Install the noise
sources apart
from the sensor
harness.
No
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 21.
Properly install
the car telephone
or the wireless
transmitter.
Go to step 23.