Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 767
IM(diag)-3
Basic Diagnostic Procedure
IMMOBILIZER (DIAGNOSTICS)
9
CHECK FREEZE FRAME DATA.
Using the Subaru Select Monitor, check the
Freeze Frame Data.
Was the Freeze Frame Data
recorded?
10
PERFORM DIAGNOSIS.
1) Inspect using the “Diagnostic Procedure
with Diagnostic Trouble Code (DTC)”. <Ref. to
IM(diag)-15, Diagnostic Procedure with Diag-
nostic Trouble Code (DTC).>
2) Repair the trouble cause.
3) Perform the Clear Memory Mode.
4) Read DTCs again.
Is the DTC displayed on
screen?
Finish the diagno-
sis.
Step
Check
Yes
No
IM(diag)-4
General Description
IMMOBILIZER (DIAGNOSTICS)
2. General Description
A: CAUTION
CAUTION:
• Do not use the electrical test equipment on
the airbag system wiring harnesses and con-
nector circuits.
• Be careful not to damage the airbag system
wiring harness.
• While diagnostic items are being checked, do
not operate radios, portable telephones, etc.
which emit electromagnetic waves near or in-
side the vehicle.
• When turning the ignition switch to ON or
OFF while diagnostic items are being checked,
do not allow keys with different ID codes close
to the ignition switch. If the ignition key is on a
key holder, remove it from the key holder be-
fore performing diagnoses.
• When repeatedly turning the ignition switch
to ON or OFF while diagnostic items are being
checked, it should be switched in cycles of
“ON” for at least 5 seconds → “OFF” for at least
8 seconds.
• If the engine fails to start with a registered ig-
nition key, detach the ignition key from ignition
switch and wait for approx. 1 second until secu-
rity indicator light begins to flash. And then
start the engine again.
• Before performing the diagnostics, obtain all
keys for the vehicle from the owner.
• Do not install or register a body integrated
unit already registered to another vehicle to di-
agnose failures or inspect functions.
NG
IM-00211
NG
IM-00212
(1) Ignition switch position
(2) Sec.
IM-00003
ON
OFF
5
8
(2)
(1)
IM(diag)-5
General Description
IMMOBILIZER (DIAGNOSTICS)
B: PREPARATION TOOL
1. SPECIAL TOOL
2. GENERAL TOOL
ILLUSTRATION
TOOL NUMBER
DESCRIPTION
REMARKS
1B022XU0
SUBARU SELECT
MONITOR III KIT
Used for troubleshooting the electrical system.
TOOL NAME
REMARKS
Circuit tester
Used for measuring resistance, voltage and current.
ST1B022XU0
IM(diag)-6
Electrical Component Location
IMMOBILIZER (DIAGNOSTICS)
3. Electrical Component Location
A: LOCATION
(1)
Antenna
(3)
Body integrated unit
(4)
Transponder
(2)
Security indicator light (LED bulb)
IM-00276
(3)
(2)
(1)
(4)
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