Subaru Legacy 2003 Service Manual page 3102

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
Step
13 CHECK BRAKE PEDAL STROKE.
Measure the stroke between non-forced pedal
position and forced pedal position with 50 kg
(110 lb).
Is the measured value less than the specified
value?
14 CHECK INPUT VOLTAGE OF PRESSURE
SENSOR.
1) Depress the brake pedal with 50 kg (110
lb).
2) Measure voltage between VDCCM connec-
tor terminals.
Connector & terminal
A (F87) No. 77 (+) — No. 76 ( − − − − ):
B (F87) No. 36 (+) — No. 76 ( − − − − ):
Does the voltage difference between A and
B exceed the specified value?
15 CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in connector between
VDCCM and pressure sensor?
16 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?
17 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES APPEARANCE.
Are other diagnostic trouble codes being out-
put?
Value
95 mm (3.74 in)
0.2 V
There is poor contact.
Same pattern.
Other DTC indicated.
VDC-129
VDC (DIAGNOSTICS)
Yes
Go to step 14. Perform bleeding.
Go to step 15. Replace VDCH/U.
<Ref. to VDC-8,
VDC Control Mod-
ule (VDCCM).>
Repair connector. Go to step 16.
Replace VDCCM. Go to step 17.
<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