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NIStune Type 1 Hardware Installation Page 9 of 9
3. Resocketing the ECU
A. 1984-1985 Dual Board - Dual ROM ECUs
Vehicles: Early Z31 300ZX and E12 Nissan Exa.
This is a multiboard ECU with a 1K and 8K ROM chip. The two chips need to be removed and jumpers
changed on the board before the NIStune board can be installed.
The ROM images must be read using a special adaptor plugged into an EPROM programmer. These are
then combined into a 16K image and converted into a NIStune ENT file for programming the board.