Subaru LEGACY 2006 Manual page 4244

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step
2 CHECK OUTPUT VOLTAGE OF VDCCM&H/
U.
Measure the voltage between VDCCM&H/U
and chassis ground.
Connector & terminal
(B310) No. 30 (+) — Chassis ground (–):
3 CHECK YAW RATE & LATERAL G SENSOR
GROUND CIRCUIT.
Measure the resistance between the yaw rate
& lateral G sensor and chassis ground.
Connector & terminal
(B230) No. 6 — Chassis ground:
4 CHECK THE VDCCM&H/U GROUND CIR-
CUIT.
Measure the resistance between VDCCM&H/U
and chassis ground.
Connector & terminal
(B310) No. 16 — Chassis ground:
5 CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in con-
6 CHECK HARNESS OF YAW RATE & LATER-
AL G SENSOR.
1) Turn the ignition switch to OFF.
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. 1 — (B230) No. 1:
7 CHECK GROUND SHORT CIRCUIT OF HAR-
NESS.
Measure the resistance between VDCCM&H/U
and chassis ground.
Connector & terminal
(B310) No. 1 — Chassis ground:
8 CHECK YAW RATE & LATERAL G SENSOR.
1) Turn the ignition switch to OFF.
2) Install the yaw rate & lateral G sensor to the
body.
3) Connect all the connectors.
4) Turn the ignition switch to ON.
5) Measure the voltage between VDCCM&H/
U connector terminals.
Connector & terminal
(B310) No. 1 (+) — (B310) No. 16 (–):
9 CHECK THE VDCCM&H/U.
1) Turn the ignition switch to OFF.
2) Connect all the connectors.
3) Erase the memory.
4) Perform the Inspection Mode.
5) Read the DTC.
10 CHECK OTHER DTC DETECTION.
Check
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?
Is the voltage 2.1 — 2.9 V?
Is the same DTC displayed?
Is any other DTC displayed?
VDC(diag)-98
Yes No
Repair the har- Go to step 5.
ness between yaw
rate & lateral G
sensor and
VDCCM& H/U.
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.
Go to step 9.
Correct or replace
the connector.
Go to step 7. Repair the har-
ness between yaw
rate & lateral G
sensor and
VDCCM& H/U.
Go to step 8. Repair the har-
ness between yaw
rate & lateral G
sensor and
VDCCM& H/U.
Go to step 9. Replace the yaw
rate & lateral G
sensor. <Ref. to
VDC-14, Yaw Rate
and Lateral G Sen-
sor.>
Replace the Go to step 10.
VDCCM&H/U.
<Ref. to VDC-7,
VDC Control Mod-
ule and Hydraulic
Control Unit
(VDCCM&H/U).>
Perform the diag- Temporary poor
nosis according to contact occurs.
DTC.