Subaru LEGACY 2003 Service Manual page 126

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
VDC (DIAGNOSTICS)
7 CHECK BATTERY SHORT OF HARNESS.
1) Turn ignition switch to ON.
2) Measure voltage between VDCCM connec-
tor and chassis ground.
Connector & terminal
(F87) No. 63 (+) — Chassis ground ( − − − − ):
(F87) No. 70 (+) — Chassis ground ( − − − − ):
(F87) No. 64 (+) — Chassis ground ( − − − − ):
Is the measured value less than the speci-
fied value?
8 CHECK LATERAL G SENSOR.
1) Turn ignition switch to OFF.
2) Remove yaw rate and lateral G sensor from
vehicle.
3) Connect connector to yaw rate and lateral
G sensor.
4) Connect connector to VDCCM.
5) Turn ignition switch to ON.
6) Measure voltage between yaw rate and lat-
eral G sensor connector terminals.
Connector & terminal
(R100) No. 5 (+) — No. 6 ( − − − − ):
Is the measured value within the specified
range when yaw rate and lateral G sensor
is horizontal?
9 CHECK YAW RATE AND LATERAL G SEN-
SOR.
Measure voltage between yaw rate and lateral
G sensor connector terminals.
Connector & terminal
(R100) No. 5 (+) — No. 6 ( − − − − ):
Is the measured value within the specified
range when yaw rate and lateral G sensor is
inclined 90° to left?
10 CHECK YAW RATE AND LATERAL G SEN-
SOR.
Measure voltage between yaw rate and lateral
G sensor connector terminals.
Connector & terminal
(R100) No. 5 (+) — No. 6 ( − − − − ):
Is the measured value within the specified
range when yaw rate and lateral G sensor is
inclined 90° to right?
11 CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in connector between
VDCCM and yaw rate and lateral G 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 V
2.3 — 2.7 V
3.3 — 3.7 V
1.3 — 1.7 V
There is poor contact.
Same pattern.
Other DTC indicated.
VDC-124
Yes
Go to step 8. Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.
Go to step 9. Replace yaw rate
and lateral G sen-
sor. <Ref. to VDC-
22, Yaw Rate and
Lateral G Sensor.>
Go to step 10. Replace yaw rate
and lateral G sen-
sor. <Ref. to VDC-
22, Yaw Rate and
Lateral G Sensor.>
Go to step 11. Replace yaw rate
and lateral G sen-
sor. <Ref. to VDC-
22, Yaw Rate and
Lateral G Sensor.>
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