Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. 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?

Record the data.
Go to step

10.

Go to step

10.

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?

Inspect using the
“Diagnostic Proce-
dure with Diagnos-
tic Trouble Code
(DTC)”. <Ref. to
IM(diag)-15, Diag-
nostic Procedure
with Diagnostic
Trouble Code
(DTC).>

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)