Subaru LEGACY 2006 Manual page 4190

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step
1 CHECK POOR CONTACT IN CONNECTOR.
Check if there is poor contact in VDCCM&H/U
power supply circuit.
2 CHECK THE VDCCM&H/U POWER SUPPLY
CIRCUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the VDCCM&H/U connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between VDCCM&H/
U connector terminals.
Terminals
(B310) No. 14 (+) — (B310) No. 6 (–):
3 CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the Inspection Mode.
4) Read the DTC.
4 CHECK OTHER DTC DETECTION.
E: DTC C0021 OPEN/HIGH INPUT OF FRONT ABS WHEEL SPEED SENSOR RH
NOTE:
For the diagnostic procedure, refer to DTC C0027 "OPEN/HIGH INPUT OF REAR ABS WHEEL SPEED
SENSOR LH". <Ref. to VDC(diag)-45, DTC C0027 OPEN/HIGH INPUT OF REAR ABS WHEEL SPEED
SENSOR LH, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
F: DTC C0023 OPEN/HIGH INPUT OF FRONT ABS WHEEL SPEED SENSOR LH
NOTE:
For the diagnostic procedure, refer to DTC C0027 "OPEN/HIGH INPUT OF REAR ABS WHEEL SPEED
SENSOR LH". <Ref. to VDC(diag)-45, DTC C0027 OPEN/HIGH INPUT OF REAR ABS WHEEL SPEED
SENSOR LH, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
G: DTC C0025 OPEN/HIGH INPUT OF REAR ABS WHEEL SPEED SENSOR RH
NOTE:
For the diagnostic procedure, refer to DTC C0027 "OPEN/HIGH INPUT OF REAR ABS WHEEL SPEED
SENSOR LH". <Ref. to VDC(diag)-45, DTC C0027 OPEN/HIGH INPUT OF REAR ABS WHEEL SPEED
SENSOR LH, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
Check
Is there poor contact?
Is the voltage 10 — 15 V?
Is the same DTC displayed?
Is any other DTC displayed?
VDC(diag)-44
Yes No
Repair the con- Go to step 2.
nector.
Go to step 3.
Check the genera-
tor, battery and
VDCCM&H/U
power supply cir-
cuit.
Go to step 4.
Replace the
VDCCM&H/U.
Perform the diag- It results from a
nosis according to temporary noise
DTC. interference.