Subaru Legacy 2002 Service Manual page 2599

DIAGNOSTICS CHART WITH SELECT MONITOR
VDC (Diagnostics)
No.
1 CHECK OUTPUT OF ABS SENSOR USING
SELECT MONITOR.
1) Select "Current data display & Save" on
the select monitor.
2) Read the ABS sensor output corresponding
to the faulty system in the select monitor data
display mode.
2 CHECK INSTALLATION OF ABS SENSOR.
Tightening torque:
32±10 N·m (3.3±1.0 kgf-m, 24±7 ft-lb)
3 CHECK ABS SENSOR GAP.
Measure tone wheel-to-pole piece gap over
entire perimeter of the wheel.
Specifications
Front wheel
0.3 — 0.8 mm (0.012 — 0.031 in)
Rear wheel
0.44 — 0.94 mm (0.0173 — 0.0370 in)
4 CHECK TONE WHEEL RUNOUT.
Measure tone wheel runout.
5 CHECK POOR CONTACT IN CONNEC-
TORS.
Turn ignition switch to OFF.
6 CHECK VDCCM.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the diagnostic trouble code.
7 CHECK ANY OTHER DIAGNOSTIC
TROUBLE CODES APPEARANCE.
8 CHECK ABS SENSOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from ABS sensor.
3) Measure resistance of ABS sensor connec-
tor 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:
Step
Does the speed indicated
on the display change in
response to the speedom-
eter reading during
acceleration/deceleration
when the steering wheel is
in the straight-ahead posi-
tion?
Are the ABS sensor instal-
lation bolts tightened
securely?
Is the gap within the speci-
fications?
Is the runout less than 0.05
mm (0.0020 in)?
Is there poor contact in
connectors between
VDCCM and ABS sensor?
Is the same diagnostic
trouble code as in the cur-
rent diagnosis still being
output?
Are other diagnostic trouble
codes being output?
Is the resistance between
1.0 and 1.5 kΩ?
VDC-140
Check Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Repair connector.
Replace VDCCM.
<Ref. to VDC-9,
VDC Control Mod-
ule (VDCCM).>
Proceed with the
diagnosis corre-
sponding to the
diagnostic trouble
code.
Go to step 9.
No
Go to step 9.
Tighten ABS sen-
sor installation
bolts securely.
Adjust the gap.
NOTE:
Adjust the gap
using spacers
(Part No.
26755AA000). If
spacers cannot
correct the gap,
replace worn sen-
sor or worn tone
wheel.
Repair tone
wheel. Front <Ref.
to VDC-30, Front
Tone Wheel.>
Rear <Ref. to
VDC-31, Rear
Tone Wheel.>
Go to step 6.
Go to step 7.
A temporary poor
contact.
NOTE:
Check harness
and connectors
between VDCCM
and ABS sensor.
Replace ABS sen-
sor. Front <Ref. to
VDC-28, Front
ABS Sensor.>
Rear <Ref. to
VDC-29, Rear
ABS Sensor.>