Subaru LEGACY 2003 Service Manual page 143

DIAGNOSTICS CHART WITH SELECT MONITOR
Step
1 CHECK OUTPUT OF ABS SENSOR USING
SELECT MONITOR.
1) Select "Current data display & Save" on the
select monitor.
2) Read the ABS sensor output corresponding
to the faulty system in the select monitor
data display mode.
Does the speed indicated on the display
change in response to the speedometer
reading during acceleration/deceleration
when the steering wheel is in the straight-
ahead position?
2 CHECK POOR CONTACT IN CONNECTORS.
Turn ignition switch to OFF.
Is there poor contact in connectors between
VDCCM and ABS sensor?
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 SHIELD CIRCUIT.
1) Turn ignition switch to OFF.
2) Connect all connectors.
3) Measure resistance between shield con-
nector and chassis ground.
Connector & terminal
DTC 22 / (F45) No. 10 — Chassis
ground:
DTC 22 / (F2) No. 17 — Chassis ground:
DTC 24 / (F45) No. 10 — Chassis
ground:
DTC 24 / (F2) No. 17 — Chassis ground:
Is the measured value less than the speci-
fied value?
NOTE:
For the DTC 26 and 28, Go to step 6.
6 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?
7 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES APPEARANCE.
Are other diagnostic trouble codes being out-
put?
8 CHECK INSTALLATION OF ABS SENSOR.
Tightening torque:
33 ± ± ± ± 10 N·m (3.3 ± ± ± ± 1.0 kgf-m, 24 ± ± ± ± 7 ft-lb)
Are the ABS sensor installation bolts tightened
securely?
Value
Change
There is poor contact.
Installed properly.
Installed
0.5 Ω
Same pattern.
Other DTC indicated.
Tightened securely.
VDC-141
VDC (DIAGNOSTICS)
Yes
Go to step 2. Go to step 8.
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.
Go to step 6. Repair shield har-
ness.
Replace VDCCM. Go to step 7.
<Ref. to VDC-8,
VDC Control Mod-
ule (VDCCM).>
Proceed with the A temporary noise
diagnosis corre- interference.
sponding to the
diagnostic trouble
code.
Go to step 9. Tighten ABS sen-
sor installation
bolts securely.
No