Subaru Legacy 2003 Service Manual page 3110

DIAGNOSTICS CHART WITH SELECT MONITOR
Step
12 CHECK BATTERY SHORT OF HARNESS.
Measure voltage between VDCCM connector
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 ( − − − − ):
Is the measured value less than the specified
value?
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 ( − − − − ):
Is the measured value less than the speci-
fied value?
14 CHECK INSTALLATION OF ABS SENSOR.
Are the ABS sensor installation bolts tightened
securely?
Tightening torque:
33 ± ± ± ± 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.
Is the measured value within the specified
range?
16 CHECK HUB AND TONE WHEEL RUNOUT.
Measure hub and tone wheel runout.
Is the measured value less than the specified
value?
17 CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in connectors between
VDCCM and ABS sensor?
Value
1 V
1 V
Tightened securely.
Front wheel 0.3 - 0.8 mm
(0.012 - 0.031 in) and Rear
wheel 0.44 - 0.94 mm (0.0173 -
0.0370 in)
0.05 mm (0.0020 in)
There is poor contact.
VDC-137
VDC (DIAGNOSTICS)
Yes
Go to step 13. Repair harness
between VDCCM
and ABS sensor.
Go to step 14. Repair harness
between VDCCM
and ABS sensor.
Go to step 15. Tighten ABS sen-
sor installation
bolts securely.
Go to step 16. Adjust the gap.
NOTE:
Adjust the gap us-
ing spacers (Part
No. 26755AA000).
If spacers cannot
correct the gap, re-
place worn sensor
or worn
wheel.
Go to step 17. Repair hub and
tone wheel. Front
<Ref. to VDC-27,
Front ABS Sen-
sor.> Rear <Ref.
to VDC-28, Rear
ABS Sensor.>
Repair connector. Go to step 18.
No
tone