NIStune Feature Pack V.1 - Manual (Page 4)

Page 4 of 27
Flex Fuel
Flex fuel sensors measure the ethanol content of fuel passing through it and report the rating as a percentage. The
sensors output a frequency and a converter is required to translate this into a voltage which can be read by the ECU.
Nistune will read the flex fuel input via diagnostic connector input on the ECU. This requires modification of the
Nissan ECU hardware. A flex fuel kit comprising a sensor and content analyser is required.
Nistune Flex Converter
Nistune have developed a content analyser board which is internally mounted to the ECU. It will be sold with the
board and flex cable. Flex fuel sensors can be purchased separately.
The flex board is mounted to the top of existing components using durable double sided table.
BLACK - GND
RED – 12V
GREEN – Input
Run a 5 volt line from the regulator to the 5V input
Sensor Installation
WARNING: Competent professionals must install the flex fuel sensor according to the manufacturer’s instructions.
The flex fuel sensors are normally installed on the return line to the fuel tank. Flex sensor: Continental #13577394