VDC(diag)-103
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
AX:DTC C0074 PRESSURE SENSOR
DTC DETECTING CONDITION:
Defective pressure sensor
TROUBLE SYMPTOM:
• ABS does not operate.
• VDC does not operate.
Step
Check
Yes
No
1
CHECK STOP LIGHT SWITCH CIRCUIT.
Check stop light switch open circuit.
Is the stop light switch circuit
OK?
Go to step
2.
Repair the stop
light switch circuit.
NOTE:
If there is malfunc-
tion in the stop light
circuit, DTC may
be recorded in the
memory.
2
CHECK OUTPUT OF PRESSURE SENSOR
WITH SUBARU SELECT MONITOR.
1) Select “Current Data Display & Save” in
Subaru Select Monitor. <Ref. to VDC(diag)-19,
READ CURRENT DATA, OPERATION, Subaru
Select Monitor.>
2) Read the «Pressure Sensor Output» dis-
played on display.
When the brake pedal is
released, is the displayed value
–40 — 40 bar?
Go to step
3.
Replace the
VDCCM&H/U.
<Ref. to VDC-8,
VDC Control Mod-
ule and Hydraulic
Control Unit
(VDCCM&H/U).>
3
CHECK OUTPUT OF PRESSURE SENSOR
WITH SUBARU SELECT MONITOR.
1) Select “Current Data Display & Save” in
Subaru Select Monitor. <Ref. to VDC(diag)-19,
READ CURRENT DATA, OPERATION, Subaru
Select Monitor.>
2) Read the «Pressure Sensor Output» dis-
played on display.
When the brake pedal is oper-
ated, does the pressure sensor
output value displayed on the
screen change in accordance
with the brake pedal?
Go to step
4.
Replace the
VDCCM&H/U.
<Ref. to VDC-8,
VDC Control Mod-
ule and Hydraulic
Control Unit
(VDCCM&H/U).>
4
CHECK PRESSURE SENSOR.
1) Clear the memory. <Ref. to VDC(diag)-27,
Clear Memory Mode.>
2) Perform the Inspection Mode. <Ref. to
VDC(diag)-26, Inspection Mode.>
3) Read the DTC.
Is the same DTC displayed?
Replace the
VDCCM&H/U.
<Ref. to VDC-8,
VDC Control Mod-
ule and Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step
5.
5
CHECK OTHER DTC DETECTION.
Is any other DTC displayed?
Perform the diag-
nosis according to
DTC. <Ref. to
VDC(diag)-48, List
of Diagnostic Trou-
ble Code (DTC).>
It results from a
temporary noise
interference.