Subaru Legacy III (2000-2003 year). Manual - part 741

VDC-32

VDC

VDC OFF SWITCH

C: INSPECTION

Check continuity between VDC off switch termi-
nals.

If NG, replace VDC off switch.

Switch position

Tester connection

Specified condition

OFF

6 — 5

More than 1 M

Ω

ON

6 — 5

Less than 1 

Ω

VDC00103

1
3

4

5

6

2

Off switch side

VDC (DIAGNOSTICS)

VDC

Page

1.

Basic Diagnostic Procedure ........................................................................2

2.

Check List for Interview...............................................................................6

3.

General Description ....................................................................................9

4.

Electrical Components Location................................................................11

5.

Control Module I/O Signal .........................................................................13

6.

VDCCM Connector Cover .........................................................................19

7.

Subaru Select Monitor...............................................................................20

8.

Read Diagnostic Trouble Code (DTC) ......................................................23

9.

Inspection Mode........................................................................................24

10.

Clear Memory Mode..................................................................................25

11.

Warning Light Illumination Pattern ............................................................26

12.

List of Diagnostic Trouble Code (DTC) .....................................................27

13.

Diagnostics Chart with Diagnosis Connector ............................................33

14.

Diagnostics Chart with Select Monitor ....................................................130

15.

General Diagnostic Table........................................................................275

VDC-2

VDC (DIAGNOSTICS)

BASIC DIAGNOSTIC PROCEDURE

1. Basic Diagnostic Procedure

A: PROCEDURE

1. WITHOUT SUBARU SELECT MONITOR

Step

Value

Yes

No

1

CHECK PRE-INSPECTION.
1) Ask the customer when and how the trou-

ble occurred using interview checklist. 
<Ref. to VDC-6, Check List for Interview.>

2) Before performing diagnosis, inspect unit 

which might influence the VDC problem. 
<Ref. to VDC-9, INSPECTION, General 
Description.>
Is unit that might influence the VDC prob-
lem normal?

Normal

Go to step 2.

Repair or replace 
each unit.

2

CHECK INDICATION OF DIAGNOSTIC 
TROUBLE CODE (DTC).
Calling up diagnostic trouble code (DTC). 
<Ref. to VDC-23, WITHOUT SUBARU 
SELECT MONITOR, OPERATION, Read 
Diagnostic Trouble Code (DTC).>
Is diagnostic trouble code (DTC) readable? 

Can be read.

Go to step 3.

Inspect using diag-
nostic chart for 
warning light fail-
ure. <Ref. to VDC-
33, ABS WARN-
ING LIGHT, VDC 
WARNING LIGHT, 
VDC OPERAT-
ING INDICATOR 
LIGHT OR VDC 
OFF INDICATOR 
LIGHT DOES 
NOT COME ON., 
Diagnostics Chart 
with Diagnosis 
Connector.>

NOTE:
Call up diagnostic 
trouble code 
(DTC) again after 
inspecting warning 
light. <Ref. to 
VDC-23, WITH-
OUT SUBARU 
SELECT MONI-
TOR, OPERA-
TION, Read 
Diagnostic Trou-
ble Code (DTC).>  

3

CHECK DIAGNOSTIC TROUBLE CODE 
(DTC). 
Is only the start code issued? 

NOTE:

Record all diagnostic trouble codes (DTCs). 

Only start code indicated.

Go to step 4.

Go to step 5.

VDC-3

VDC (DIAGNOSTICS)

BASIC DIAGNOSTIC PROCEDURE

CAUTION:
Remove foreign matter (dust, water, etc.) from the VDCCM connector during removal and installation.

NOTE:
• To check harness for broken wires or short circuits, shake it while holding it or the connector.
• When ABS and/or VDC warning light illuminates, read and record diagnostic trouble code (DTC) indicated
by ABS warning light.

4

PERFORM THE GENERAL DIAGNOSTICS. 
1) Inspect using “General Diagnostics Table”. 

<Ref. to VDC-275, General Diagnostic 
Table.>

2) Perform the clear memory mode. <Ref. to 

VDC-25, WITHOUT SUBARU SELECT 
MONITOR, OPERATION, Clear Memory 
Mode.>

3) Perform the inspection mode. <Ref. to 

VDC-24, Inspection Mode.>
Calling up the diagnostic trouble code 
(DTC). <Ref. to VDC-23, WITHOUT SUB-
ARU SELECT MONITOR, OPERATION, 
Read Diagnostic Trouble Code (DTC).>
Is only the start code issued? 

Only start code indicated.

Complete the 
diagnosis. 

Go to step 5.

5

PERFORM THE DIAGNOSIS.
1) Inspect using “Diagnostics Chart with Diag-

nostic Connector”.<Ref. to VDC-33, Diag-
nostics Chart with Diagnosis Connector.>

NOTE:

For diagnostic trouble code (DTC) list, refer to
“List of Diagnostic Trouble Code (DTC)”. <Ref.
to VDC-27, WITHOUT SUBARU SELECT
MONITOR, LIST, List of Diagnostic Trouble
Code (DTC).>

2) Repair trouble cause.
3) Perform the clear memory mode. <Ref. to 

VDC-25, WITHOUT SUBARU SELECT 
MONITOR, OPERATION, Clear Memory 
Mode.>

4) Perform the inspection mode. <Ref. to 

VDC-24, Inspection Mode.>  

5) Calling up the diagnostic trouble code 

(DTC). <Ref. to VDC-23, WITHOUT SUB-
ARU SELECT MONITOR, OPERATION, 
Read Diagnostic Trouble Code (DTC).>
Is only the start code issued? 

Only start code indicated.

Complete the 
diagnosis. 

Inspect using 
“Diagnostics Chart 
with Diagnostic 
Connector”. <Ref. 
to VDC-33, Diag-
nostics Chart with 
Diagnosis Con-
nector.>

Step

Value

Yes

No