Subaru 2009 IMPREZA Service Manual page 2552

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
AT:DTC C0072 CHANGE RANGE OF YAW RATE SENSOR SIGNAL IS TOO BIG
DTC DETECTING CONDITION:
Defective yaw rate sensor
TROUBLE SYMPTOM:
VDC does not operate.
WIRING DIAGRAM:
B231
1 2 3 4
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 & G SENSOR INSTAL-
LATION.
B310 VDCCM & H/U
TWISTED PAIR LINE
B231
STEERING
YAW RATE &
ANGLE
G SENSOR
SENSOR
B230
B230
1
2
3
4
Did the vehicle run the road
with banks or sandy surface
(which does not mean a dirt
road)?
Is the yaw rate & G sensor
installation bolt tightened to 7.5
N·m (0.76 kgf-m, 5.5 ft-lb)?
VDC(diag)-90
MAIN SBF
IGNITION SWITCH
E
B310
1 2 3 4 5 6 7 8 9
22 23 24 25
26 27 28 29 30 31 32 33 34 35 36
Check
VDCCM&H/U may
record DTC when
the vehicle ran the
road with banks or
sandy surface
(which does not
mean a dirt road).
Go to step 3.
BATTERY
E
10 11 12 13 14 15 16 17 18 19 20 21
37 38 39 40 41 42 43 44 45 46
VDC00690
Yes No
Go to step 2.
Tighten the yaw
rate & G sensor
installation bolt.