Subaru 602 - 2012 Impreza Immobilizer Type B

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June 2013
Electrical Systems Operation & Diagnosis Module (602)
2012 Impreza Immobilizer Type B
The 2012 Impreza is equipped with a new Immobilizer system. This new system is identified
as Immobilizer type ”B” . All previous Immobilizer systems will now be identified as type “A” .The
Immobilizer type “B” simplifies the registration of new parts and reduces the need to have all of
the registered keys on hand to perform service work.
If an ECM or Combination Meter is replaced.
• Only the key accompanying the car to the dealer needs to be present. In this case only
the replacement part needs to be registered.
If the BIU is replaced.
• All of the keys need to be present. (Remote Engine Start will need to be reprogrammed).
• The keys do not need to be replaced.
The Immobilizer type “B” does not utilize a security code and requires no teaching code when
registering any part of the Immobilizer system. There will only be one metal tag on a new vehicle’s
key ring set. This tag is for the mechanical key code.
Security identification is through the use of one registered key. If all registered keys are missing,
the BIU and Combination Meter must be replaced (and the number of keys requested by the
customer). Four (4) keys and RES can be programmed to the Immobilizer system. The new
Combination Meter and BIU will register the unregistered key.
Note: Driver’s door must remain open during all registration procedures.
The following charts should be referenced when replacing single parts or multiple parts of the
Immobilizer system.
When only one part is failed or lost
Desti-
nation
Parts failed/lost
Parts required to replace or prepared
when items on the left fail
Procedures to perform after parts replacement
Key
Body
inte-
grated
unit
Combi-
nation
meter
Security
CU
ECU Key
Body
inte-
grated
unit
Combi-
nation
meter
Security
CU
ECU (1) (2) (3) (4)
Others
Not
all
All
O X
One regis-
tered key
“Immobilizer
Key ID deletion”
(Deleting lost
keys)
“Immobilizer
system registra-
tion” (Register-
ing keys needed)
O X
Keys you
want to
register
# #
Immobilizer
system registra-
tion”
O X
All regis-
tered keys
X
Immobilizer
system registra-
tion”
O X
One regis-
tered key
X
“Meter/SCU
registration”
O X
One regis-
tered key
X
“Engine ECU
registration”
0 = Yes
X = Applicable Condition
# = Not failed but must be replaced for security reasons
When two or more parts need to be replaced.