Subaru LEGACY 2003 Service Manual page 149

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
Step
1 CHECK WHEELS FOR FREE TURNING.
Have the wheels been turned freely such as
when the vehicle is lifted up, or operated on a
rolling road?
2 CHECK OUTPUT OF G SENSOR USING SE-
LECT MONITOR.
1) Select "Current data display & Save" on the
select monitor.
2) Read the select monitor display.
Is the G sensor output on the monitor dis-
play within the specified range when the
vehicle is in horizontal position?
3 CHECK OUTPUT OF G SENSOR USING SE-
LECT MONITOR.
1) Turn ignition switch to OFF.
2) Remove console box.
3) Remove G sensor from vehicle. (Do not
disconnect connector.)
4) Turn ignition switch to ON.
5) Select "Current data display & Save" on the
select monitor.
6) Read the select monitor display.
Is the G sensor output on the monitor dis-
play within the specified range when G
sensor is inclined forwards to 90°?
4 CHECK OUTPUT OF G SENSOR USING SE-
LECT MONITOR.
Read the select monitor display.
Is the G sensor output on the monitor display
within the specified range when G sensor is
inclined backwards to 90°?
5 CHECK POOR CONTACT IN CONNECTORS.
Turn ignition switch to OFF.
Is there poor contact in connector between
ABSCM&H/U and G sensor?
6 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?
7 CHECK ANY OTHER DTC APPEARANCE.
Are other DTC being output?
8 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?
Value
Wheel have not turned freely.
2.1 - 2.5 V
3.7 - 4.1 V
0.5 - 0.9 V
There is no poor contact.
Same DTC is not indicated.
Other DTC is not indicated.
5.0 - 5.6 kΩ
ABS-147
ABS (DIAGNOSTICS)
Yes
Go to step 2. The ABS is nor-
mal. Erase the
trouble code.
Go to step 3. Go to step 8.
Go to step 4. Replace G sen-
sor. <Ref. to ABS-
21, G Sensor.>
Go to step 5. Replace G sen-
sor. <Ref. to ABS-
21, G Sensor.>
Go to step 6. Repair connector.
Go to step 7. 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 9. Repair harness/
connector
between G sensor
and ABSCM&H/U.
No