VDC(diag)-83
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
AI: DTC C0056 G SENSOR SIGNAL
DTC DETECTING CONDITION:
Defective longitudinal G sensor output signal
TROUBLE SYMPTOM:
Hill start assist does not operate.
Step
Check
Yes
No
1
WHETHER A WHEEL TURNED FREELY OR
NOT.
Check if the wheels have been turned freely for
one minute or more, such as when the vehicle is
jacked-up, under full-lock cornering or when the
wheels are not in contact with road surface.
Did the wheels turn freely?
VDC is normal.
Clear the memory.
Go to step
2.
2
CHECK OUTPUT OF LONGITUDINAL G
SENSOR USING SUBARU SELECT MONI-
TOR.
1) Park the vehicle on a level surface.
2) Select “Current Data Display & Save” on the
Subaru Select Monitor. <Ref. to VDC(diag)-19,
READ CURRENT DATA, OPERATION, Subaru
Select Monitor.>
3) Read the «Fr Rr G sensor Output».
Is the indicated reading on the
monitor display –1.2 — 1.2 m/s
2
?
Go to step
3.
Replace the yaw
rate & G sensor.
<Ref. to VDC-20,
Yaw Rate and G
Sensor.>
3
CHECK OUTPUT OF LONGITUDINAL G
SENSOR USING SUBARU SELECT MONI-
TOR.
1) Turn the ignition switch to OFF.
2) Remove the yaw rate & G sensor from vehi-
cle. <Ref. to VDC-20, Yaw Rate and G Sensor.>
3) Turn the ignition switch to ON, and select the
“Current Data Display & Save” in Subaru Select
Monitor. <Ref. to VDC(diag)-19, READ CUR-
RENT DATA, OPERATION, Subaru Select
Monitor.>
4) Read the «Fr Rr G sensor Output».
When the yaw rate & G sensor is
inclined 90° to the front, is the
indicated value 6.8 — 12.8 m/s
2
?
Go to step
4.
Replace the yaw
rate & G sensor.
<Ref. to VDC-20,
Yaw Rate and G
Sensor.>
4
CHECK OUTPUT OF LONGITUDINAL G
SENSOR USING SUBARU SELECT MONI-
TOR.
Read the «Fr Rr G sensor Output».
When the yaw rate & G sensor
is inclined 90° to the rear, is the
indicated value –6.8 — –12.8
m/s
2
?
Go to step
5.
Replace the yaw
rate & G sensor.
<Ref. to VDC-20,
Yaw Rate and G
Sensor.>
5
CHECK POOR CONTACT OF CONNECTOR.
Turn the ignition switch to OFF.
Is there poor contact of connec-
tor between VDCCM&H/U and
yaw rate & G sensor?
Repair the connec-
tor.
Go to step
6.
6
CHECK VDCCM&H/U.
1) Connect all connectors.
2) Clear the memory. <Ref. to VDC(diag)-27,
Clear Memory Mode.>
3) Perform the Inspection Mode. <Ref. to
VDC(diag)-26, Inspection Mode.>
4) Read the DTC.
Is the same DTC displayed?
Replace the
VDCCM only.
<Ref. to VDC-12,
REPLACEMENT,
VDC Control Mod-
ule and Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step
7.
7
CHECK OTHER DTC DETECTION.
Is any other DTC displayed?
Perform the diag-
nosis according to
DTC. <Ref. to
VDC(diag)-48, List
of Diagnostic Trou-
ble Code (DTC).>
Temporary poor
contact occurs.