Subaru LEGACY 2006 Manual page 4242

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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 POOR CONTACT OF CONNECTOR. Is there poor contact in con-
4 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:
5 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:
6 CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in con-
7 CHECK YAW RATE & LATERAL G SENSOR
HARNESS.
1) Disconnect the connector from the
VDCCM&H/U.
2) Measure the resistance between VDCCM&
H/U and yaw rate & lateral G sensor.
Connector & terminal
(B310) No. 28 — (B230) No. 4:
8 CHECK GROUND SHORT OF HARNESS.
Measure the resistance between VDCCM&H/U
connector and chassis ground.
Connector & terminal
(B310) No. 28 — Chassis ground:
9 CHECK YAW RATE & LATERAL G SENSOR.
1) Connect all the connectors.
2) Turn the ignition switch to ON.
3) Check the signal pattern of oscilloscope
between VDCCM&H/U connector terminals.
<Ref. to VDC(diag)-16, WAVEFORM, MEA-
SUREMENT, Control Module I/O Signal.>
Connector & terminal
(B310) No. 2 — No. 16:
(B310) No. 28 — No. 16:
10 CHECK YAW RATE & LATERAL G SENSOR.
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.
11 CHECK OTHER DTC DETECTION.
Check
Is the voltage 10 — 15 V?
nector?
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 oscilloscope pattern the
same waveform as shown in
the figure?
Is the same DTC displayed?
Is any other DTC displayed?
VDC(diag)-96
Yes No
Repair the har- Go to step 3.
ness between yaw
rate & lateral G
sensor and
VDCCM& H/U.
Correct or replace Go to step 10.
the connector.
Go to step 7. Go to step 5.
Repair the har- Go to step 6.
ness between yaw
rate & lateral G
sensor and
VDCCM& H/U.
Correct or replace Go to step 10.
the connector.
Go to step 8.
Repair the har-
ness between yaw
rate & lateral G
sensor and
VDCCM& H/U.
Go to step 9. Repair the har-
ness between yaw
rate & lateral G
sensor and
VDCCM& H/U.
Go to step 10.
Replace the yaw
rate & lateral G
sensor.
Replace the Go to step 11.
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.