Power Supply - Subaru Legacy 2005 Service Manual

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step
1 CHECK DRIVING PLACE.
Check if the vehicle ran the road with banks or
sandy surface (which does not mean a dirt
road).
2 CHECK YAW RATE & LATERAL G SENSOR
INSTALLATION.
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 GROUND CIRCUIT OF YAW RATE &
LATERAL G SENSOR.
Measure the resistance between yaw rate &
lateral G sensor and chassis ground.
Connector & terminal
(B230) No. 6 — Chassis ground:
6 CHECK GROUND CIRCUIT OF VDCCM&H/U.
Measure the resistance between VDCCM&H/U
and chassis ground.
Connector & terminal
(B310) No. 16 — Chassis ground:
7 CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in con-
8 CHECK HARNESS OF YAW RATE & LATER-
AL G SENSOR.
1) Disconnect the connector from VDCCM&H/
U.
2) Measure the resistance between
VDCCM&H/U and yaw rate & lateral G sensor.
Connector & terminal
(B310) No. 1 — (B230) No. 1:
(B310) No. 2 — (B230) No. 2:
(B310) No. 28 — (B230) No. 4:
9 CHECK GROUND SHORT CIRCUIT OF HAR-
NESS.
Measure the resistance between VDCCM&H/U
connector and chassis ground.
Connector & terminal
(B310) No. 1 — Chassis ground:
(B310) No. 2 — Chassis ground:
(B310) No. 28 — Chassis ground:
Check
Did the vehicle run the road
with banks or sandy surface
(which does not mean a dirt
road)?
Is the yaw rate & lateral G sen-
sor installation bolt tightened to
7.5 N⋅m (0.76 kgf-m, 5.5 ft-lb)?
Is the voltage 10 — 15 V?
−
):
Is the voltage 10 — 15 V?
−
):
Is the resistance less than 0.5
Ω?
Is the resistance less than 0.5
Ω?
nector?
Is the resistance less than 0.5
Ω?
Is the resistance more than 1
MΩ?
VDC(diag)-116
Yes
VDCCM&H/U may Go to step 2.
record DTC when
the vehicle ran the
road with banks or
sandy surface
(which does not
mean a dirt road).
Go to step 3. Tighten the yaw
rate & lateral G
sensor installation
bolt.
Go to step 5. Go to step 4.
Repair the har- Go to step 7.
ness between yaw
rate & lateral G
sensor and
VDCCM&H/U.
Go to step 8. Go to step 6.
Repair the har- Go to step 7.
ness between yaw
rate & lateral G
sensor and
VDCCM&H/U.
Correct or replace Go to step 14.
the connector.
Go to step 9. Repair the har-
ness between yaw
rate & lateral G
sensor and
VDCCM&H/U.
Go to step 10. Repair the har-
ness between yaw
rate & lateral G
sensor and
VDCCM&H/U.
No