Subaru Legacy 2002 Service Manual page 2601

DIAGNOSTICS CHART WITH SELECT MONITOR
VDC (Diagnostics)
No.
13 CHECK BATTERY SHORT OF HARNESS.
1) Turn ignition switch to ON.
2) Measure voltage between VDCCM connec-
tor and chassis ground.
Connector & terminal
DTC 21 / (F87) No. 14 (+) — Chassis
ground (−):
DTC 23 / (F87) No. 49 (+) — Chassis
ground (−):
DTC 25 / (F87) No. 18 (+) — Chassis
ground (−):
DTC 27 / (F87) No. 16 (+) — Chassis
ground (−):
14 CHECK INSTALLATION OF ABS SENSOR.
Tightening torque:
32±10 N·m (3.3±1.0 kgf-m, 24±7 ft-lb)
15 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)
16 CHECK HUB AND TONE WHEEL RUNOUT.
Measure hub and tone wheel runout.
17 CHECK POOR CONTACT IN CONNEC-
TORS.
18 CHECK VDCCM.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the diagnostic trouble code.
19 CHECK ANY OTHER DIAGNOSTIC
TROUBLE CODES APPEARANCE.
Step
Is the voltage less than 1
V?
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?
VDC-142
Check Yes
Go to step 14.
Go to step 15.
Go to step 16.
Go to step 17.
Repair connector.
Replace VDCCM.
<Ref. to VDC-9,
VDC Control Mod-
ule (VDCCM).>
Proceed with the
diagnosis corre-
sponding to the
diagnostic trouble
code.
No
Repair harness
between VDCCM
and ABS sensor.
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 hub and
tone wheel. Front
<Ref. to VDC-28,
Front ABS Sen-
sor.> Rear <Ref.
to VDC-29, Rear
ABS Sensor.>
Go to step 18.
Go to step 19.
A temporary poor
contact.
NOTE:
Check harness
and connectors
between VDCCM
and ABS sensor.