VDC(diag)-50
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
5
CHECK VDCCM&H/U POWER SUPPLY CIR-
CUIT.
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.
Connector & terminal
(B310) No. 14 (+) — (B310) No. 6 (
−
):
Is the voltage 10 — 15 V?
Go to step 7.
Check the genera-
tor, battery and
VDCCM&H/U
power supply cir-
cuit.
6
CHECK ABS WHEEL SPEED SENSOR SIG-
NAL.
1) Install the ABS wheel speed sensor.
2) Prepare an oscilloscope.
3) Check the ABS wheel speed sensor. <Ref.
to ABS-15, ABS WHEEL SPEED SENSOR,
INSPECTION, Rear ABS Wheel Speed Sen-
sor.>
Is waveform pattern same as
shown in the figure.
Go to step 7.
Replace the ABS
wheel speed sen-
sor.
7
CHECK VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode. <Ref. to
VDC(diag)-23, PROCEDURE, Inspection
Mode.>
4) Read the DTC.
Is the same DTC displayed?
Replace the
VDCCM&H/U.
<Ref. to VDC-7,
VDC Control Mod-
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step 8.
8
CHECK OTHER DTC DETECTION.
Is any other DTC displayed?
Perform the diag-
nosis according to
DTC.
It results from a
temporary noise
interference.
Step
Check
Yes
No
Summary of Contents for 2004 LEGACY
Page 29: ...FS 28 FRONT SUSPENSION General Diagnostic Table ...
Page 56: ...RS 26 REAR SUSPENSION General Diagnostic Table ...
Page 69: ...WT 12 WHEEL AND TIRE SYSTEM General Diagnostic Table ...
Page 148: ...DI 78 DIFFERENTIALS General Diagnostic Table ...
Page 215: ...ABS 20 ABS G Sensor ...
Page 458: ...VDC diag 136 VEHICLE DYNAMICS CONTROL VDC DIAGNOSTICS General Diagnostic Table ...
Page 471: ...BR 12 BRAKE General Description 6 BRAKE BOOSTER 1 Brake booster BR 00335 1 ...
Page 507: ...BR 48 BRAKE Diagnosis ...