Subaru Legacy 2002 Service Manual page 2456

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
No.
1 CHECK ALL FOUR WHEELS FOR FREE
TURNING.
2 CHECK OUTPUT OF G SENSOR USING
SELECT MONITOR.
1) Select "Current data display & Save" on
the select monitor.
2) Read the select monitor display.
3 CHECK OUTPUT OF G SENSOR USING
SELECT 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.
4 CHECK OUTPUT OF G SENSOR USING
SELECT MONITOR.
Read the select monitor display.
5 CHECK POOR CONTACT IN CONNEC-
TORS.
Turn ignition switch to OFF.
6 CHECK ABSCM&H/U.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the DTC.
7 CHECK ANY OTHER DTC APPEARANCE.
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:
9 CHECK G SENSOR.
1) Remove console box.
2) Remove G sensor from vehicle.
3) Connect connector to G sensor.
4) Connect connector to ABSCM&H/U.
5) Turn ignition switch to ON.
6) Measure voltage between G sensor con-
nector terminals.
Connector & terminal
(R70) No. 2 (+) — No. 3 (−):
Step
Have the wheels been
turned freely such as when
the vehicle is lifted up, or
operated on a rolling road?
Is the G sensor output on
the monitor display
between 2.1 and 2.5 V
when the vehicle is in hori-
zontal position?
Is the G sensor output on
the monitor display
between 3.7 and 4.1 V
when G sensor is inclined
forwards to 90°?
Is the G sensor output on
the monitor display
between 0.5 and 0.9 V
when G sensor is inclined
backwards to 90°?
Is there poor contact in
connector between
ABSCM&H/U and G sen-
sor?
Is the same DTC as in the
current diagnosis still being
output?
Are other DTC being out-
put?
Is the resistance between
4.3 and 4.9 kΩ?
Is the voltage between 2.1
and 2.5 V when G sensor
is horizontal?
ABS-155
Check Yes
The ABS is nor-
mal. Erase the
trouble code.
Go to step 3.
Go to step 4.
Go to step 5.
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.
Go to step 9.
Go to step 10.
ABS (Diagnostics)
No
Go to step 2.
Go to step 8.
Replace G sen-
sor. <Ref. to ABS-
22, G Sensor.>
Replace G sen-
sor. <Ref. to ABS-
22, G Sensor.>
Go to step 6.
Go to step 7.
A temporary poor
contact.
Repair harness/
connector
between G sensor
and ABSCM&H/U.
Replace G sen-
sor. <Ref. to ABS-
22, G Sensor.>