Subaru Legacy 2003 Service Manual page 2931

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
ABS (DIAGNOSTICS)
10 CHECK OPEN CIRCUIT IN G SENSOR OUT-
PUT HARNESS AND GROUND HARNESS.
1) Turn ignition switch to OFF.
2) Disconnect connector from ABSCM&H/U.
3) Measure resistance between ABSCM&H/U
connector terminals.
Connector & terminal
(F49) No. 6 — No. 28:
Is the measured value within the specified
range?
11 CHECK BATTERY SHORT OF HARNESS.
1) Turn ignition switch to OFF.
2) Remove console box.
3) Disconnect connector from G sensor.
4) Disconnect connector from ABSCM&H/U.
5) Measure voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 6 (+) — Chassis ground ( − − − − ):
Is the measured value less than the speci-
fied value?
12 CHECK BATTERY SHORT OF HARNESS.
1) Turn ignition switch to ON.
2) Measure voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 6 (+) — Chassis ground ( − − − − ):
Is the measured value less than the speci-
fied value?
13 CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in connector between
ABSCM&H/U and G sensor?
14 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?
15 CHECK ANY OTHER DTC APPEARANCE.
Are other DTC being output?
16 CHECK INPUT VOLTAGE OF G SENSOR.
1) Turn ignition switch to OFF.
2) Remove console box.
3) Disconnect G sensor from body. (Do not
disconnect connector.)
4) Turn ignition switch to ON.
5) Measure voltage between G sensor con-
nector terminals.
Connector & terminal
(R70) No. 1 (+) — No. 3 ( − − − − ):
Is the measured value within the specified
range?
Step Value
5.0 - 5.6 kΩ
1 V
1 V
There is no poor contact.
Same DTC is not indicated.
Other DTC is not indicated.
4.75 - 5.25 V
ABS-140
Yes
Go to step 11. Repair harness/
connector
between G sensor
and ABSCM&H/U.
Go to step 12. Repair harness
between G sensor
and ABSCM&H/U.
Go to step 13. Repair harness
between G sensor
and ABSCM&H/U.
Go to step 14. Repair connector.
Go to step 15. Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
A temporary poor Proceed with the
contact. diagnosis corre-
sponding to the
DTC.
Go to step 17. Repair harness/
connector
between G sensor
and ABSCM&H/U.
No