Subaru Legacy IV (2008 year). 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.>