Subaru 602 - Page 46

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June 2013
Electrical Systems Operation & Diagnosis Module (602)
Antenna
The electric wave, absorbed by the antenna
in the transponder, charges the capacitor in
the transponder. An encrypted code is sent at
the end of the charging wave. The transponder
decrypts the code and sends an encrypted code
back to the antenna coil, which travels back to
the BIU.
Signal sent and received at Antenna Coil
The BIU compares the code sent by the
transponder with the code programmed into
the BIU and sends an encrypted code to the
combination meter.
Combination Meter
The combination meter decrypts the code and
sends a response back to the BIU.
The result of this signal determines if the engine
is allowed to continue operating if it has been
started.
ECM
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