Basic Diagnostic Procedure - Subaru LEGACY 2003 Service Manual

VDC (DIAGNOSTICS)

1. Basic Diagnostic Procedure

A: PROCEDURE
1. WITHOUT SUBARU SELECT MONITOR
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?
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?
3 CHECK DIAGNOSTIC TROUBLE CODE
(DTC).
Is only the start code issued?
NOTE:
Record all diagnostic trouble codes (DTCs).
BASIC DIAGNOSTIC PROCEDURE
Step Value
Normal
Can be read.
Only start code indicated.
VDC-2
Yes
Go to step 2. Repair or replace
each unit.
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).>
Go to step 4. Go to step 5.
No