Subaru 2009 IMPREZA Service Manual page 2555

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
2 CHECK YAW RATE & G SENSOR GROUND
CIRCUIT.
Measure the resistance between yaw rate & G
sensor and chassis ground.
Connector & terminal
(B230) No. 4 — Chassis ground:
3 CHECK YAW RATE & G SENSOR HARNESS.
1) Disconnect the connector from the
VDCCM&H/U.
2) Measure the resistance between VDCCM&
H/U and yaw rate & G sensor.
Connector & terminal
(B230) No. 3 — (B310) No. 10:
(B230) No. 2 — (B310) No. 35:
4 CHECK GROUND SHORT CIRCUIT IN YAW
RATE & G SENSOR HARNESS.
Measure the resistance between yaw rate & G
sensor and chassis ground.
Connector & terminal
(B230) No. 2 — Chassis ground:
(B230) No. 3 — Chassis ground:
5 CHECK YAW RATE & G SENSOR.
1) Turn the ignition switch to OFF.
2) Connect all connectors.
3) Clear the memory. <Ref. to VDC(diag)-24,
Clear Memory Mode.>
4) Perform the Inspection Mode. <Ref. to
VDC(diag)-23, Inspection Mode.>
5) Read the DTC.
6 CHECK YAW RATE & G SENSOR.
1) Turn the ignition switch to OFF.
2) Replace the yaw rate & G sensor. <Ref. to
VDC-16, Yaw Rate and G Sensor.>
3) Clear the memory. <Ref. to VDC(diag)-24,
Clear Memory Mode.>
4) Perform the Inspection Mode. <Ref. to
VDC(diag)-23, Inspection Mode.>
5) Read the DTC.
7 CHECK OTHER DTC DETECTION.
8 CHECK OTHER DTC DETECTION.
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Check
Is the resistance less than 0.5 ? Go to step 3.
Is the resistance less than 0.5 ? Go to step 4.
Is the resistance 1 M or
more?
Is the same DTC displayed?
Is the same DTC displayed?
Is any other DTC displayed?
Is any other DTC displayed?
VDC(diag)-93
Yes No
Repair the yaw rate
& G sensor ground
circuit.
Repair the harness
between yaw rate
& G sensor and
VDCCM&H/U.
Go to step 5. Repair the harness
between yaw rate
& G sensor and
VDCCM&H/U.
Go to step 6. Go to step 7.
Replace the Go to step 8.
VDCCM only.
<Ref. to VDC-9,
REPLACEMENT,
VDC Control Mod-
ule and Hydraulic
Control Unit
(VDCCM&H/U).>
Perform the diag- Temporary poor
nosis according to contact occurs.
DTC. <Ref. to
VDC(diag)-33, List
of Diagnostic Trou-
ble Code (DTC).>
Perform the diag- Malfunction is
nosis according to found in original
DTC. <Ref. to yaw rate & G sen-
VDC(diag)-33, List sor.
of Diagnostic Trou-
ble Code (DTC).>