About the Eprom
Contents
1. Original Tuning Original Tuning Chip Chip T Chip Chip ip Function is the same as above Function is the same as above NOTE the user is absolutely free in the selection of a suitable switch also in its placement In cars with no alarm systems the unused switch therefor in the dash board could be used Page 2 Eprom Switch User Manual Coup Fiat 20V Turbo Installation Guide 1 How to get the ECU out of the car The ECU is located in the co drivers footwell behind Remove the cover by dismantling the two M10 nuts a plastic cover Bend the red marked bending latches Remove the The upper more solid part of the housing baseplate green marked screws with a T9 TORX screwdriver can now first be raised then removed Page 3 Eprom Switch User Manual Coup Fiat 20V Turbo 3 How to remove the original chip Locate the original Eprom Don t touch the Carefully remove the chip from the socket with an electronics to prevent discharge damages IC extractor proposed or the included tool Put the chips in the sockets of the Eprom Switch as Put the complete Eprom Switch in the socket in the shown on the picture keep forces small ECU Take care about mounting direction 5 How to finish the work Make sure that the Switch es are solid mounted Then proceed backwards through the steps 2 and 1 Page 4 Eprom Switch User Manual Coup Fiat 20V Turbo Important Notes for the use of the Eprom Switch At Ins2. Eprom Switch User Manual Coup Fiat 20V Turbo About the Eprom Switch The Eprom Switch is a device that allows the driver to switch between the genuine eprom chip device and a device with modificated parameter tables Tuning Chip The switching may happen seamless during engine operation or at stillstand related to the used engine manage ment The switching functionality does not affect any security function of the engine manage ment as long as the used chips do not and can be removed fast and without remaining modifications Features e Seemless switching even during engine operation e Accurate signal synchronisation no undefined ECU operation states e Expanded mode for 3 chips with additional switch e Very small signal skew lt 5 ns e High quality components and materials professionally assembled e Highly reliable e Solid and compact mechanical design e External closing contact with 1 or 2 wire connection or local jumper e Easilly mounting no soldering Plug amp Play concept Technical Specifications a E Ss pic Possible Operation Restrictions Known restrictions at this state for the use with the Coup Fiat 20VT due to the existence of two or more firmware versions for the 20VT it s not guaranteed that the switching during engine s operation works under all circumstances If the installed chips in the Eprom Switch do NOT have the same firmware base then switching during engine operation will defi
3. It is proposed to switch only at idling After switching increase the power slightly the first time This will allow the engine management to perform the new adaptation more accurately Page 5 Eprom Switch User Manual Coup Fiat 20V Turbo Guarantee A The supplier of the Eprom Switch does ONLY guarant for the function of the Eprom Switch but NEVER becomes liable for any damages resulting from the use of it The use of the Eprom Switch happens COMPLETELY on the own risk of the customer B The Eprom Switch has an unlimited 2 year guarantee on material defects at the Eprom Switch If a defect occurs within this period then the supplier will exchange the Eprom Switch immediately and without further costs In that case please contact the supplier per E mail to arrange the details Customer Details Name Address City Country E Mail Purchasing Details Dellivery Date Carrier Payment Methode Serial Number Guarantee valid till Contact Details of the Supplier Twains Automotive Products Switzerland info twains ch This E Mail address is valid for all kind of requests Problems guarantee purchase inquiries etc More detailed contact informations on request TWAINS 2003 errors and omissions excepted subject to alterations Page 6
4. nitively NOT work Just nice to know switching at stillstand does work under ALL circumstances Known firmware versions and associated tuning chips Used since till Associated Tuning Chips DAMOS 15 11 04 1997 Apr 1997 Today Digitec Dbilas Salas Wenning Wetterauer Novitec Page 1 Eprom Switch User Manual Coup Fiat 20V Turbo NOTE Other than shown firmware versions might also exist eg country specific Please make sure that you do not switch between Eproms with different firmware programs during operation This may damage the engine Testing it would be on your own risk If you are not sure about the characteristics of your chips please request at the provider of your tuning solution Operation Modes e Single Mode one Eprom Switch is used together with two Eproms Switching function between these two Eproms initiated over one closing contact e Dual Mode two cascaded Eprom Switches are used together with three Eproms Switching function between these three Eproms initiated over two closing contacts Connection Diagrams Single Mode 2 wire cabling normally proposed 1 wire cabling Original Tuning Original Tuning Chip Chip TI Chip Chip Any closing Any a a Cable is contac not ye Hog We Contact closed Tuning Chip Contact closed Tuning Chip Contact open Original Chip Contact open Original Chip Not connected Dual Mode 4 wire cabling normally proposed 2 wire cabling
5. tallation Prevent electrostatic discharge by complying to the following rules 1 Before you begin with the installation make shure that you are not electrostatically charged by touching something grounded as a banister radiator etc or by wearing a grounding band Recur the discharge process from time to time 2 Don t touch the contact pins of the electronic devices 3 Deposit the electronic parts only on grounded places 4 Store the unused electronic parts in a antistatic bag NEVER use brute forces to mount the Switch in the ECU The high precision parts do fit without that Be careful Keep the switching contacts free from other voltage potentials than the supplied 5V and the cars ground The switch may be additionally fixed optional For this use 2 small pieces of adhesive tape and chain the side faces of the ECU socket and the WS socket adapter together on 2 sides FER T E r e a s te p yy uP ye aA 3 Tee Piedra wa z oon Ds a ETETETT y Adhesive Tape At Operation Make sure that you know the firmware versions of your Eproms Only so you can be sure that switching at engine operation will not cause problems or damages to the engine this refers to the text concerning the firmware topic at the pages 1 amp 2 of this document Avoid switching at higher revs and under higher load This stresses the engine and may cause strange effects at engine operation due to abrupt changes of engine parameters
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