Subaru LEGACY 2006 Manual page 4251

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK LATERAL G SENSOR OUTPUT.
1) Park the vehicle on a level surface.
2) Select {Current Data Display & Save} in
Subaru Select Monitor.
3) Read the lateral G sensor output displayed
on screen.
2 CHECK POOR CONTACT IN CONNECTORS.
Turn the ignition switch to OFF.
3 CHECK YAW RATE & LATERAL G SENSOR
POWER SUPPLY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from yaw rate &
lateral G sensor.
3) Turn the ignition switch to ON.
4) Measure the voltage between yaw rate &
lateral G sensor and chassis ground.
Connector & terminal
(B230) No. 3 (+) — Chassis ground (–):
4 CHECK OUTPUT VOLTAGE OF VDCCM&H/
U.
Measure the voltage between VDCCM&H/U
and chassis ground.
Connector & terminal
(B310) No. 30 (+) — Chassis ground (–):
5 CHECK POOR CONTACT OF CONNECTOR. Is there poor contact in con-
6 CHECK OPEN CIRCUIT IN LATERAL G SEN-
SOR OUTPUT HARNESS.
1) Disconnect the connector from yaw rate &
lateral G sensor.
2) Disconnect the connector from the
VDCCM&H/U.
3) Measure the resistance between VDCCM&
H/U and yaw rate & lateral G sensor.
Connector & terminal
(B310) No. 3 — (B230) No. 5:
7 CHECK GROUND SHORT CIRCUIT FOR
YAW RATE & LATERAL G SENSOR HAR-
NESS.
Measure the resistance between VDCCM&H/U
connector and chassis ground.
Connector & terminal
(B310) No. 3 — Chassis ground:
8 CHECK LATERAL G SENSOR.
1) Turn the ignition switch to OFF.
2) Remove the yaw rate & lateral G sensor
from vehicle.
3) Connect the connector to the yaw rate &
lateral G sensor.
4) Connect the VDCCM&H/U connector.
5) Turn the ignition switch to ON.
6) Measure the voltage between yaw rate &
lateral G sensor connector terminals.
Connector & terminal
(B230) No. 5 (+) — (B230) No. 6 (–):
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Check
Is the indicated reading on the
monitor display –1.5 — 1.5 m/
2
s ?
Is there poor contact in con-
nector between VDCCM& H/U
and yaw rate & lateral G sen-
sor?
Is the voltage 10 — 15 V?
Is the voltage 10 — 15 V?
nector?
Is the resistance less than 0.5
Ω?
Is the resistance more than 1
MΩ?
Is the voltage 2.35 — 2.65 V
when yaw rate & lateral G sen-
sor is on a level?
VDC(diag)-105
Yes No
Go to step 2. Go to step 3.
Repair the con- Go to step 10.
nector.
Go to step 6. Go to step 4.
Go to step 5.
Repair the har-
ness between yaw
rate & lateral G
sensor and
VDCCM& H/U.
Correct or replace Go to step 10.
the connector.
Go to step 7.
Repair the har-
ness connector
between yaw rate
& lateral G sensor
and VDCCM&H/U.
Go to step 8. Repair the har-
ness connector
between yaw rate
& lateral G sensor
and VDCCM&H/U.
Go to step 9. Replace the yaw
rate & lateral G
sensor.