Basic Diagnostic Procedure - Subaru LEGACY 2003 Service Manual

ABS (DIAGNOSTICS)

1. Basic Diagnostic Procedure

A: PROCEDURE
1. WITHOUT SUBARU SELECT MONITOR
CAUTION:
Remove foreign matter (dust, water, etc.) from the ABSCM&H/U connector during removal and instal-
lation.
NOTE:
• To check harness for broken wires or short circuits, shake it while holding it or the connector.
• When ABS warning light illuminates, read and record diagnostic trouble code (DTC) indicated by ABS
warning light.
1 CHECK PRE-INSPECTION.
1) Ask the customer when and how the trou-
ble occurred using interview checklist.
<Ref. to ABS-5, Check List for Interview.>
2) Before performing diagnosis, inspect unit
which might influence the ABS problem.
<Ref. to ABS-8, INSPECTION, General
Description.>
Is the component part that might influence
the ABS problem normal?
2 CHECK INDICATION OF DIAGNOSTIC
TROUBLE CODE (DTC).
Calling up diagnostic trouble code (DTC).
<Ref. to ABS-19, Read Diagnostic Trouble
Code (DTC).>
Is ABS warning light normal?
3 CHECK DIAGNOSTIC TROUBLE CODE
(DTC).
NOTE:
Record all diagnostic trouble codes (DTC).
Is only the start code displayed?
BASIC DIAGNOSTIC PROCEDURE
Step Value
Component part is normal.
ABS warning light is normal.
Only the start code displayed. Go to step 4.
ABS-2
Yes
Go to step 2. Repair or replace
each unit.
Go to step 3. Inspect using diag-
nostic chart for
ABS warning light
failure.<Ref. to
ABS-28, Diagnos-
tics Chart with
Diagnosis Con-
nector.>
NOTE:
Call up diagnostic
trouble code (DTC)
again after inspect-
ing ABS warning
light. <Ref. to ABS-
19, Read Diagnos-
tic Trouble Code
(DTC).>
Go to step 5.
No