NIStune Type 1 Diagnostics - Manual (Page 2)

WARNING
If your ECU pulses the fuel pump, injectors, fuel regulator, flashes LEDs randomly (or they just
stay on when they shouldn’t) or your engine does not start then your ECU could be reading a
corrupt ROM image.
Testing has shown that a corrupt ECU can keep the Mass Airflow Meter heater element on
longer than 1 second and blow it like a fuse. This can even occur with other software driving an
emulator or a bad BIN image file.
Ensure a corrupted image in your ECU is rectified immediately and is powered off if corruption
is suspected to avoid this situation possibly occurring to you.
Corrupted ECU images are likely to be caused by
- Bad or incorrect image file loaded into the Type 1 board or emulator
- Poor connection between the Nistune board and ECU due to failure to secure the board
correctly using hot glue or similar mechanism
- Poor header cable connection to the ECU from Nistune board
- Mismatched Nistune board configuration for the ECU image you are attempting to use
How to fix this:
- Always firstly try ECU with the factory ROM image using the original ROM chip you removed
during installation. Attempt to start the vehicle with this chip before using with the vehicle with
the Nistune board installed.
- Then attempt with the factory tune loaded in the Nistune board (where possible) to verify the
board works correctly.
- Type 1 Rev1-2 boards only: Then attempt with the Nistune updated ROM image with the
Nistune board to verify the ROM image works correctly
- Then attempt USB Consult connection to the Nistune board and this should connect and
communicate with your laptop.
This document covers some of these issues in further detail