Subaru LEGACY 2003 Service Manual page 77

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
Step
1 CHECK GROUND CIRCUIT OF VDCCM.
1) Turn ignition switch to OFF.
2) Disconnect connector from VDCCM.
3) Measure resistance between VDCCM and
chassis ground.
Connector & terminal
(F87) No. 1 — Chassis ground:
(F87) No. 55 — Chassis ground:
Is the measured value less than the speci-
fied value?
2 CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in connectors between
battery, ignition switch and VDCCM?
3 CHECK SOURCES OF SIGNAL NOISE.
Is the car telephone or the wireless transmitter
properly installed?
4 CHECK SOURCES OF SIGNAL NOISE.
Are noise sources (such as an antenna)
installed near the sensor harness?
5 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?
6 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES APPEARANCE.
Are other diagnostic trouble codes being out-
put?
Value
0.5 Ω
There is poor contact.
Tightened securely.
Installed properly.
Same DTC indicated.
Other DTC indicated.
VDC-75
VDC (DIAGNOSTICS)
Yes
Go to step 2. Repair VDCCM
ground harness.
Repair connector. Go to step 3.
Go to step 4. Properly install the
car telephone or
the wireless trans-
mitter.
Install the noise Go to step 5.
sources apart from
the sensor har-
ness.
Replace VDCCM. Go to step 6.
<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