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3
Installing NIRA i7x
When installing NIRA i7x it is recommended that you follow the directions
below. Begin by determining if additional sensors are needed and where to
install them. Make sure any existing sensors you expect to use with NIRA i7x
are in good working order. The NIRA i7x wiring harness has markings in clear
text on each wire to simplify the work of connecting all the sensors.
Each sensor and actuator will need an appropriate connector attached to the
harness. The connector terminals should be crimped for best performance
and rubber seals should be used where the wires enter the connector
housing. (Your NIRA i7x dealer sells seals for all sensors.) If proper crimp tools
are not available, soldering may be used. Poorly crimped terminals are a
common source of intermittent problems. Always cover any soldered splices
with heat shrinkable tubing.
Do not skimp on the sensors. Use new sensors if you are unsure of the
condition of the existing ones. Old throttle position sensors often have hard-
to-find drop out points which can not be detected with standard multimeters.
Your NIRA i7x dealer stocks many of the sensors needed or can recommend
sensors.
Note that the MAP, MAT and ECT sensors sold by your NIRA i7x dealer have
been pre-calibrated in NIRA rk. These are recommended. Other sensors will
need to be calibrated separately. Calibration is done using one of the
Wizards in NIRA rk.
3.1 Crank Position Sensor (CKP) and Trigger
Wheel
To control ignition timing, injection timing and several other
important outputs, NIRA i7x needs a signal that is telling the
position of the crankshaft. This signal is provided by a crank
position sensor that creates the signal by reading the pattern of a pulse
wheel that is fitted to the crankshaft. NIRA i7x supports both hall sensors and
inductive sensors.
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