Subaru Legacy IV (2008 year). Service manual — part 921

VDC-22

Front Magnetic Encoder

VEHICLE DYNAMICS CONTROL (VDC)

9. Front Magnetic Encoder

A: NOTE

Vehicles equipped with VDC have the same mag-
netic encoder as installed on vehicles equipped
with ABS. Refer to “Front Magnetic Encoder” for re-
moval, installation and inspection procedures.
<Ref. to ABS-16, Front Magnetic Encoder.>

VDC-23

Rear Magnetic Encoder

VEHICLE DYNAMICS CONTROL (VDC)

10.Rear Magnetic Encoder

A: NOTE

Vehicles equipped with VDC have the same mag-
netic encoder as installed on vehicles equipped
with ABS. Refer to “Rear Magnetic Encoder” for re-
moval, installation and inspection procedures.
<Ref. to ABS-17, Rear Magnetic Encoder.>

VDC-24

VDC OFF Switch

VEHICLE DYNAMICS CONTROL (VDC)

11.VDC OFF Switch

A: REMOVAL

1) Remove the instrument panel lower cover.
2) Remove the screws, and then remove the VDC
OFF switch.

B: INSTALLATION

Install in the reverse order of removal.

C: INSPECTION

Measure the resistance between the VDC OFF
switch terminals.

If NG, replace the VDC OFF switch.

Switch position

Terminal No.

Standard

OFF

5 — 15

1 M

: or more

ON

5 — 15

Less than 1

:

VDC00240

7 6 5

4 3 2 1

15

14 13 12 11 10

9 8

VDC(diag)-2

Basic Diagnostic Procedure

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

1. Basic Diagnostic Procedure

A: PROCEDURE

CAUTION:
Remove foreign matter (dust, water, oil etc.) from the VDCCM&H/U connector during removal and in-
stallation.

NOTE:
• To check the harness for open or short circuits, shake problem spot or connector.
• Refer to “Check List for Interview”. <Ref. to VDC(diag)-4, Check List for Interview.>

Step

Check

Yes

No

1

CHECK PRE-INSPECTION.
1) Ask the customer when and how the trouble
occurred using the interview check list. <Ref. to
VDC(diag)-4, Check List for Interview.>
2) Before performing diagnostics, check the
component which might affect VDC problems.
<Ref. to VDC(diag)-8, INSPECTION, General
Description.>

Is the component that might
influence the VDC problem nor-
mal?

Go to step 2.

Repair or replace
each component.

2

CHECK INDICATION OF DTC.
1) Turn the ignition switch to OFF.
2) Connect the Subaru Select Monitor to data
link connector.
3) Turn the ignition switch to ON and run the
Subaru Select Monitor.
4) Read the DTC using the Subaru Select
Monitor. <Ref. to VDC(diag)-21, OPERATION,
Read Diagnostic Trouble Code (DTC).>

NOTE:
If the communication function of the Subaru Se-
lect Monitor cannot be executed normally,
check the communication circuit. <Ref. to
VDC(diag)-18, COMMUNICATION FOR INI-
TIALIZING IMPOSSIBLE, INSPECTION, Sub-
aru Select Monitor.>
5) Record all DTCs and freeze frame data.

Is DTC displayed on the Subaru
Select Monitor?

Go to step 4.

Go to step 3.

3

PERFORM GENERAL DIAGNOSTICS.
1) Perform the inspection by referring to “Gen-
eral Diagnostic Table”. <Ref. to VDC(diag)-101,
INSPECTION, General Diagnostic Table.>
2) Perform the Clear Memory Mode. <Ref. to
VDC(diag)-23, OPERATION, Clear Memory
Mode.>
3) Perform the Inspection Mode. <Ref. to
VDC(diag)-22, PROCEDURE, Inspection
Mode.>
4) Read the DTC. <Ref. to VDC(diag)-21,
OPERATION, Read Diagnostic Trouble Code
(DTC).>
5) Check the DTC is not displayed.

Do the VDC warning light and
ABS warning light go off after
starting the engine?

Finish the diagno-
sis.

Check the combi-
nation meter cir-
cuit. <Ref. to
VDC(diag)-29,
ABS WARNING
LIGHT DOES NOT
GO OFF, Warning
Light Illumination
Pattern.> <Ref. to
VDC(diag)-31,
VDC WARNING
LIGHT AND VDC
OFF INDICATOR
LIGHT DO NOT
GO OFF, Warning
Light Illumination
Pattern.>