EFI AC I Series Product information sheet

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EFI TECHNOLOGY AC**I
For ASW-NEXT
Short User Manual
July 2022

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Important notes:
This user manual applies to CDI units manufactured by EFI TECHNOLOGY. They can be recognized
by presence of EFI TECHNOLOGY logo on the label or on the plastic casing of CDI unit.
Letter “I” in the part name means “IMMOBILIZER”. For example, CDI unit AC19I has built-in
immobilizer function, meanwhile AC19 is non-immobilized version of same CDI unit.
Please keep in mind that transponder key programming is not possible for CDI units without letter
“I” in the part name.

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1. How to connect?
ACII / AC2I / AC5I / AC8I / AC13I / AC14I / AC21I / AC23I
AC24I / AC25I / AC32I
AC19I/ AC20I / AC27I(also comes with black connectors with the same pin-out)

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2. Software features
•Read / Write internal ST7 EEPROM (if equipped)
•Read / Write external SPI EEPROM
•Read / Set keys
To read existing and to store new desired values of transponders. Up to 4 keys can
be programmed during this procedure.
➢Reset to VIRGIN
Erases all keys. Control unit is ready to self-learn new transponder values after
Reset-to-VIRGIN.
3. Key programming procedures
Let‘s oveview several possible situations:
➢All keys were lost
Connect wires from interface of ASW-NEXT to CDI unit, apply +12V power to
connection and press „Read /Set Keys“ button. Diagnostic connection to CDI unit
will be established and transponder values will be read:
Write value of any active (marked with green) key to transponder T5 as TEMIC-11
using any suitable transponder programmer. Choose data with header „BE FA“ or
„7D 5F“depending on type of your transponder programmer.

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➢You want to set / delete key(s) manually in CDI unit
Press „Read /Set Keys“ button. Diagnostic connection to CDI unit will be
established and transponder values will be read. Select position to set key to.
Read key you want to store to CDI unit with any transponder programmer.
Software will automatically re-allign bits and now it looks like this:
Let‘s say you‘ve got
TYPE-11 or T5-11
transponder and your
transponder reader
displayed value as in
the picture above.
Enter this value to the „Set / Remove key“ field
and press „Set key“ button. Software will
accept valid transponder value from a key
programmer of every type –no data
conversion of any kind is required.

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You may delete unneeded keys and set as many keys as you need (max 4):
•Use „Save to text file“ to access transponder data later if no physical
transponder is prepared yet.
•Press „Apply changes“ button to write key programming values to control unit
Please note that CDI unit will treat itself as not completely programmed with only
one key stored. To avoid this you must to store one more key, even if single key
is needed. Just enter any valid value for a second key position, different from
value of MASTER key.
➢You want to reset CDI unit to VIRGIN state
•Fill all key positions with BE FA BE FA BE FA BE FA
•Press „Apply changes“ to program blank key values to memory
or
•Press button „Reset to VIRGIN“

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➢You want to learn keys to the VIRGIN CDI unit
•Make yourself two valid T5-11 transponders or take two ready suitable keys of
TEMIC-11 / TYPE-11.
To make T5-11 transponders please program to one of them, for example:
BE FA 00 00 00 11 22 33 (7D 5F 00 00 00 88 44 CC)*and
BE FA 00 00 00 11 22 34 (7D 5F 00 00 00 88 44 2C)*to another.
Both transponders must be programmed with different values.
•Turn on ignition with first key for 1.5 sec. Turn off ignition while LED is still on.
Key will be stored as a MASTER
•Turn on ignition with second key for 1.5 sec. Turn off ignition while LED is still
on. Key will be stored as a SERVICE
•Turn on ignition with first key again for 1.5 sec. Turn off ignition while LED is
still on. Programming procedure closed.
NOTE: Do not exceed time of 1.5 seconds when changing key in ignition lock between every
step.
*- Depends on type of transponder programmer (does it use BE FA or 7D 5F header)