Subaru LEGACY 2003 Service Manual page 270

DIAGNOSTICS CHART WITH SELECT MONITOR
VDC (DIAGNOSTICS)
7 CHECK GROUND SHORT OF HARNESS.
1) Turn ignition switch to OFF.
2) Disconnect connector from VDCCM.
3) Measure resistance between VDCH/U con-
nector and chassis ground.
Connector & terminal
(F91) No. 14 — Chassis ground:
Does the measured value exceed the spec-
ified value?
8 CHECK BATTERY SHORT OF HARNESS.
Measure voltage between VDCH/U connector
and chassis ground.
Connector & terminal
(F91) No. 14 (+) — Chassis ground ( − − − − ):
Is the measured value less than the specified
value?
9 CHECK BATTERY SHORT OF HARNESS.
1) Turn ignition switch to ON.
2) Measure voltage between VDCH/U con-
nector and chassis ground.
Connector & terminal
(F91) No. 13 (+) — Chassis ground ( − − − − ):
(F91) No. 14 (+) — Chassis ground ( − − − − ):
Is the measured value less than the speci-
fied value?
10 CHECK INPUT VOLTAGE OF PRESSURE
SENSOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from VDCCM.
3) Remove cover from VDCCM. <Ref. to
VDC-19, REMOVE, VDCCM Connector
Cover.>
4) Connect connector to VDCCM.
5) Connect all connectors.
6) Turn ignition switch to ON.
7) Do not depress brake pedal.
8) Measure voltage between VDCCM connec-
tor terminals.
Connector & terminal
(F87) No. 36 (+) — No. 76 ( − − − − ):
Is the measured value within the specified
range?
11 CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in connector between
VDCCM and pressure sensor?
12 CHECK VDCCM.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the diagnostic trouble code.
Is the same diagnostic trouble code as in
the current diagnosis still being output?
13 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES APPEARANCE.
Are other diagnostic trouble codes being out-
put?
Step Value
1 MΩ
0.5 V
0.5 V
0.48 — 0.72 V
There is poor contact.
Same DTC indicated.
Other DTC indicated.
VDC-268
Yes
Go to step 8. Repair harness
between VDCH/U
and VDCCM.
Go to step 9. Repair harness
between VDCH/U
and VDCCM.
Go to step 10. Repair harness
between VDCH/U
and VDCCM.
Go to step 11. Replace VDCH/U.
<Ref. to VDC-8,
VDC Control Mod-
ule (VDCCM).>
Repair connector. Go to step 12.
Replace VDCCM. Go to step 13.
<Ref. to VDC-8,
VDC Control Mod-
ule (VDCCM).>
Proceed with the A temporary poor
diagnosis corre- contact.
sponding to the
diagnostic trouble
code.
No