Subaru 2009 IMPREZA Service Manual page 2382

ABS (DIAGNOSTICS)
1. Basic Diagnostic Procedure
A: PROCEDURE
CAUTION:
Remove foreign matter (dust, water, oil etc.) from the ABSCM&H/U connector during removal and in-
stallation.
NOTE:
• To check harness for open or short circuits, shake the suspected trouble spot or connector.
• Refer to "Check List for Interview". <Ref. to ABS(diag)-3, Check List for Interview.>
Step
1 CHECK PRE-INSPECTION.
1) Ask the customer when and how the trouble
occurred using the interview check list. <Ref. to
ABS(diag)-3, Check List for Interview.>
2) Before performing diagnostics, check the
components which might affect ABS problems.
<Ref. to ABS(diag)-7, INSPECTION, General
Description.>
2 CHECK 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.
NOTE:
If the communication function of the Subaru Se-
lect Monitor cannot be executed properly,
check the communication circuit. <Ref. to
ABS(diag)-16, COMMUNICATION FOR INI-
TIALIZING IMPOSSIBLE, INSPECTION, Sub-
aru Select Monitor.>
4) Read the DTC using Subaru Select Monitor.
<Ref. to ABS(diag)-19, OPERATION, Read
Diagnostic Trouble Code (DTC).>
3 PERFORM GENERAL DIAGNOSTICS.
1) Perform the inspection by referring to "Gen-
eral Diagnostic Table". <Ref. to ABS(diag)-60,
General Diagnostic Table.>
2) Perform the Clear Memory Mode. <Ref. to
ABS(diag)-21, Clear Memory Mode.>
3) Perform the Inspection Mode. <Ref. to
ABS(diag)-20, Inspection Mode.>
4) Read the DTC. <Ref. to ABS(diag)-13,
HOW TO USE SUBARU SELECT MONITOR,
OPERATION, Subaru Select Monitor.>
Check the DTC is not displayed.
4 PERFORM DIAGNOSIS.
1) Refer to "List of Diagnostic Trouble Code
(DTC)". <Ref. to ABS(diag)-26, LIST, List of
Diagnostic Trouble Code (DTC).>
2) Correct the cause of trouble.
3) Perform the Clear Memory Mode. <Ref. to
ABS(diag)-21, Clear Memory Mode.>
4) Perform the Inspection Mode. <Ref. to
ABS(diag)-20, Inspection Mode.>
5) Read the DTC. <Ref. to ABS(diag)-13,
HOW TO USE SUBARU SELECT MONITOR,
OPERATION, Subaru Select Monitor.>
Basic Diagnostic Procedure
Are components which might
affect the ABS problem operat-
ing correctly?
Is DTC displayed on the Subaru
Select Monitor?
Does the ABS warning light go
off after turning the ignition
switch to ON?
Is DTC displayed?
ABS(diag)-2
Check Yes
Go to step 2.
Record the DTCs
and Information in
Trouble State. Go
to step 4.
Finish the diagno-
sis.
Repeat step 1 to 4
until DTC does not
appear.
No
Repair or replace
each component.
Go to step 3.
Check the combi-
nation meter cir-
cuit. <Ref. to
ABS(diag)-23,
ABS WARNING
LIGHT DOES NOT
GO OFF, ABS
Warning Light /
Brake Warning
Light Illumination
Pattern.>
Finish the diagno-
sis.