VDC(diag)-35
List of Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
C0032 4321FR pressure reducing
valve malfunction
Fr o nt o ut l et s ol en o id
valve RH malfunction in
VDCCM&H/U
VDCCM&H/U, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
C0033 4331FL hold valve malfunc-
tion
Fr o nt i nl e t s ol e no i d
valve LH malfunction in
VDCCM&H/U
VDCCM&H/U, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
C0034 4341FL pressure reducing
valve malfunction
Fr o nt o ut l et s ol en o id
valve LH malfunction in
VDCCM&H/U
VDCCM&H/U, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
C0035 4351RR hold valve malfunc-
tion
Rear inlet solenoid
valve RH malfunction in
VDCCM&H/U
VDCCM&H/U, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
C0036 4361RR pressure reducing
valve malfunction
Rear outlet solenoid
valve RH malfunction in
VDCCM&H/U
VDCCM&H/U, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
C0037 4371RL hold valve malfunc-
tion
Rear inlet solenoid
valve LH malfunction in
VDCCM&H/U
VDCCM&H/U, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
C0038 4381RL pressure reducing
valve malfunction
Rear outlet solenoid
valve LH malfunction in
VDCCM&H/U
VDCCM&H/U, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
C0061 4611VDC switching valve (P)
system
Primary linear valve
malfunction in
VDCCM&H/U
U, D iagnostic Procedure with Diagnostic Trouble
Code (DTC).>
C0062 4621VDC switching valve (S)
system
Secondary linear valve
malfunction in
VDCCM&H/U
VDCCM&H/U, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
C0063 4631 VDC switching valveLinear valve malfunc-
tion in VDCCM&H/U
nostic Procedure with Diagnostic Trouble Code
(DTC).>
C0042 4421Pow er s up p ly vo lt a ge
failure
Powe r vo lt a ge ma lf u nc -
tion
with Diagnostic Trouble Code (DTC).>
C0047 C471CAN communication
system
Improper CAN commu-
nication
with Diagnostic Trouble Code (DTC).>
C0051
4511Va l ve r e l a y s y s t e m o p e n
lineVa l ve r e l ay o p e n l i n e
dure with Diagnostic Trouble Code (DTC).>
4512Va l ve r e l ay s y s t e m
short
Va l ve r e l ay s y s t e m
short
with Diagnostic Trouble Code (DTC).>
DTCDetailed
codeDisplay Content of diagnosis Reference target
VDC(diag)-36
List of Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
C0052
4521Motor relay system
open line
Motor / motor relay sys-
tem open line
tic Procedure with Diagnostic Trouble Code
(DTC).>
4522Motor relay system
short
Motor / motor relay sys-
tem short
Procedure with Diagnostic Trouble Code (DTC).>
4523Motor system not run-
ning
Motor system not run-
ning
with Diagnostic Trouble Code (DTC).>
4524 Motor systemMotor system malfunc-
tion
with Diagnostic Trouble Code (DTC).>
4525Motor fail safe system
short
Motor fail safe system
short
cedure with Diagnostic Trouble Code (DTC).>
C0054 4541Brake light switch open
line
Brake light switch open
line
dure with Diagnostic Trouble Code (DTC).>
C0056
4561G Sensor Output Sei-
zureG sensor output seizure
Diagnostic Trouble Code (DTC).>
4562 G sensor signalG sensor signal mal-
function
with Diagnostic Trouble Code (DTC).>
4563Ya w G s e n s o r p o w e r
voltage
Fau l t y yaw ra te & la t era l
G sensor power supply
voltage
FUNCTION, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>
4564 G sensor outputDefective G sensor out-
put
with Diagnostic Trouble Code (DTC).>
C565G sensor communica-
tion
Defective G sensor
communication
cedure with Diagnostic Trouble Code (DTC).>
4566 G sensor inside Defect inside G sensor
Diagnostic Trouble Code (DTC).>
C0057
C571ECM communication
circuit
ECM communication
circuit
nostic Trouble Code (DTC).>
C573TCM communication
circuit
TCM communication
circuit
Tr o u b l e C o d e ( D T C ) . >
4574 Transmission systemTr a n s m i s s i o n s y s t e m
malfunction
cedure with Diagnostic Trouble Code (DTC).>
DTCDetailed
codeDisplay Content of diagnosis Reference target
VDC(diag)-37
List of Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
C0071
4711Steering angle sensor
counter
Defective steering
angle sensor
FUNCTION, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>
C712No signal from steering
angle sensor
Defective steering
angle sensor communi-
cation
TION, Diagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>
4713Steering angle sensor
signal seizure
Steering angle sensor
signal seizure
Procedure with Diagnostic Trouble Code (DTC).>
4714Steering angle sensor
calibration incomplete
Steering angle sensor
calibration incomplete
Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
C0072
4721 Yaw rate sensor signalDefective yaw rate sen-
sor signal
Procedure with Diagnostic Trouble Code (DTC).>
4722 Inside yaw rate sensorDefect inside yaw rate
sensor
dure with Diagnostic Trouble Code (DTC).>
C723Ya w r a t e s e n s o r c o m -
munication
Defective yaw rate sen-
sor communication
Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
4724Ya w r a t e s e n s o r o s c i l l a -
tion
Ya w r a t e s e n s o r o s c i l l a -
tion malfunction
nostic Procedure with Diagnostic Trouble Code
(DTC).>
C0074
4741Pressure sensor open
line
Pressure sensor open
line
Diagnostic Trouble Code (DTC).>
4742Pressure sensor signal
seizure
Pressure sensor signal
seizure
dure with Diagnostic Trouble Code (DTC).>
4743 Pressure sensor 0 point Pressure sensor 0 point
Diagnostic Trouble Code (DTC).>
4744 Pressure sensor noise Pressure Sensor Noise
Diagnostic Trouble Code (DTC).>
4745Pressure sensor output
rise
Pressure sensor output
rise
with Diagnostic Trouble Code (DTC).>
DTCDetailed
codeDisplay Content of diagnosis Reference target
VDC(diag)-41
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
5CHECK 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.
Connector & terminal
(B310) No. 1 (+) — (B310) No. 43 (–):
Is the voltage 10 — 15 V? Go to step 7.Check the genera-
tor, batter y and
VDCCM&H/U
power supply cir-
cuit.
6CHECK ABS WHEEL SPEED SENSOR SIG-
NAL.
1) Install the ABS wheel speed sensor.
2) Prepare an oscilloscope.
3) Check the ABS wheel speed sensor.
INSPECTION, Front ABS Wheel Speed Sen-
sor.>
Is the pattern the same wave-
for m as shown in the figure?
Go to step 7.Replace the ABS
wheel speed sen-
sor.
7CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
Mode.>
4) Read the DTC.
Is the same DTC displayed? Replace the
VDCCM&H/U.
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step 8.
8CHECK 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
VDC(diag)-44
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step Check Yes No
1CHECK 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.
Connector & terminal
(B310) No. 1 (+) — (B310) No. 43 (–):
Is the voltage 10 — 15 V? Go to step 2.Check the genera-
tor, batter y and
VDCCM&H/U
power supply cir-
cuit.
2CHECK OUTPUT OF ABS WHEEL SPEED
SENSOR USING SUBARU SELECT MONI-
TOR.
1) Select {Current Data Display & Save} in
Subaru Select Monitor.
2) Read the ABS wheel speed sensor output
corresponding to the faulty wheel in Subaru
Select Monitor data display mode.
Does the speed indicated on
the display change in response
to the speedometer reading
during acceleration/decelera-
tion when the steering wheel is
in the straight-ahead position?
Go to step 3.Go to step 8.
3CHECK POOR CONTACT IN CONNECTOR.
Tu r n t h e i g n i t i o n s w i t c h t o O F F.
Is there poor contact in con-
nectors between VDCCM&H/U
and ABS wheel speed sensor?
Repair the con-
nector.
Go to step 4.
4CHECK CAUSE OF SIGNAL NOISE.
Make sure the radio wave devices and electric
components are installed correctly.
Are the radio wave devices and
electric components installed
correctly?
Go to step 5.Install the radio
wave devices and
electric compo-
nents properly.
5CHECK CAUSE OF SIGNAL NOISE.
Check if the noise sources (such as an
antenna) are installed near the sensor har-
ness.
Are noise sources installed? Install the noise
sources apart from
sensor harness.
Go to step 6.
6CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
Mode.>
4) Read the DTC.
Is the same DTC displayed? Replace the
VDCCM&H/U.
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step 7.
7CHECK OTHER DTC DETECTION.Is any other DTC displayed? Perform the diag-
nosis according to
DTC.
It results from a
temporary noise
interference.
8CHECK INSTALLATION OF ABS WHEEL
SPEED SENSOR.
Is the ABS wheel speed sen-
sor installation bolt tightened
7.5 N·m (0.76 kgf-m, 5.5 ft-lb)?
Go to step 9.Tighten the ABS
wheel speed sen-
sor installation
bolts.
9CHECK ABS WHEEL SPEED SENSOR SIG-
NAL.
1) Install the ABS wheel speed sensor.
2) Prepare an oscilloscope.
3) Check the ABS wheel speed sensor.
INSPECTION, Front ABS Wheel Speed Sen-
sor.>
Does the oscilloscope indicate
the waveform pattern like
shown in the figure when the
tire is slowly turned? Does the
oscilloscope indication repeat
the waveform pattern like
shown in the figure when the
tire is slowly turned in equal
speed for more one rotation?
Go to step 11.Go to step 10.
VDC(diag)-45
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
M: DTC C0031 FRONT INLET SOLENOID VALVE RH MALFUNCTION IN VDC-
CM&H/U
NOTE:
For the diagnostic procedure, refer to DTC C0063 “LINEAR VALVE MALFUNCTION IN VDCCM&H/U”.
N: DTC C0032 FRONT OUTLET SOLENOID VALVE RH MALFUNCTION IN VDC-
CM&H/U
NOTE:
For the diagnostic procedure, refer to DTC C0063 “LINEAR VALVE MALFUNCTION IN VDCCM&H/U”.
10 CHECK ABS WHEEL SPEED SENSOR OR
MAGNETIC ENCODER.
Are there foreign matter,
breakage or damage at the tip
of ABS wheel speed sensor or
magnetic encoder?
Remove dirt
throughly. Also
replace the ABS
wheel speed sen-
sor or magnetic
encoder as a unit
with hub unit bear-
ing if it is broken or
damaged.
Go to step 11.
11 CHECK CAUSE OF SIGNAL NOISE.
Make sure the radio wave devices and electric
components are installed correctly.
Are the radio wave devices and
electric components installed
correctly?
Go to step 12.Install the radio
wave devices and
electric compo-
nents properly.
12 CHECK CAUSE OF SIGNAL NOISE.
Check if the noise sources (such as an
antenna) are installed near the sensor har-
ness.
Is the noise sources installed? Go to step 13.Install the noise
sources apart from
sensor harness.
13 CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
Mode.>
4) Read the DTC.
Is the same DTC displayed? Replace the
VDCCM&H/U.
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step 14.
14 CHECK OTHER DTC DETECTION.Is any other DTC displayed? Perform the diag-
nosis according to
DTC.
It results from a
temporary noise
interference.
NOTE:
Though the ABS
warning light re-
mains on at this
time, it is normal.
Drive the vehicle at
more than 12 km/h
(7 MPH) in order to
turn ABS warning
light off. Be sure to
drive the vehicle
and check the
warning light goes
off.
Step Check Yes No
VDC(diag)-48
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step Check Yes No
1CHECK THE VDCCM&H/U INPUT VOLTAGE.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from the
VDCCM&H/U.
3) Run the engine at idle.
4) Measure the voltage between VDCCM&H/
U connector and chassis ground.
Connector & terminal
(B310) No. 1 (+) — Chassis ground (–):
Is the voltage 10 — 15 V? Go to step 2.Repair the power
supply circuit.
2CHECK THE VDCCM&H/U GROUND CIR-
CUIT.
1) Turn the ignition switch to OFF.
2) Measure the resistance between
VDCCM&H/U connector and chassis ground.
Connector & terminal
(B310) No. 43 — Chassis ground:
Is the resistance less than 0.5
Ω?
Go to step 3.Repair the
VDCCM&H/U
ground harness.
3CHECK POOR CONTACT OF CONNEC-
TORS.
Is there poor contact in con-
nector between generator, bat-
tery and VDCCM&H/U?
Repair the con-
nector.
Go to step 4.
4CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
Is the same DTC displayed? Replace the
VDCCM&H/U.
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step 5.
5CHECK OTHER DTC DETECTION.Is any other DTC displayed? Perform the diag-
nosis according to
DTC.
Te m p o r a r y p o o r
contact occurs.
VDC(diag)-51
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Step Check Yes No
1CHECK GENERATOR.
1) Start the engine.
2) Run the engine at idle after warming up.
3) Measure the voltage between generator
terminal B and chassis ground.
Te r m i n a l s
Generator B terminal (+) — Chassis
ground (–):
Is the voltage 10 — 15 V? Go to step 2.Repair the genera-
tor.
Generator.>
2CHECK BATTERY TERMINAL.
Tu r n t h e i g n i t i o n s w i t c h t o O F F.
Are the positive and negative
battery terminals clamped
tightly?
Go to step 3.Tighten the termi-
nal.
3CHECK THE VDCCM&H/U INPUT VOLTAGE.
1) Disconnect the connector from the
VDCCM&H/U.
2) Run the engine at idle.
3) Operate the devices such as headlights, air
conditioner, defogger, etc. which produce
much electrical loading.
4) Measure the voltage between VDCCM&H/
U connector and chassis ground.
Connector & terminal
(B310) No. 1 (+) — Chassis ground (–):
Is the voltage 10 — 15 V? Go to step 4.Repair the power
supply circuit.
4CHECK THE VDCCM&H/U GROUND CIR-
CUIT.
1) Turn the ignition switch to OFF.
2) Measure the resistance between
VDCCM&H/U connector and chassis ground.
Connector & terminal
(B310) No. 43 — Chassis ground:
Is the resistance less than 0.5
Ω?
Go to step 5.Repair the
VDCCM&H/U
ground harness.
5CHECK POOR CONTACT OF CONNEC-
TORS.
Is there poor contact in con-
nector between generator, bat-
tery and VDCCM&H/U?
Repair the con-
nector.
Go to step 6.
6CHECK THE VDCCM&H/U.
1) Connect all the connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read the DTC.
Is the same DTC displayed? Replace the
VDCCM&H/U.
ule & Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step 7.
7CHECK OTHER DTC DETECTION.Is any other DTC displayed? Perform the diag-
nosis according to
DTC.
of Diagnostic Trou-
ble Code (DTC).>
Te m p o r a r y p o o r
contact occurs.