Electromotive xdi, Installation Manual & Users Manual

Page: 21 / 36

XDI Manual Version 1.8 Page 21
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2017 Electromotive, Inc.
WARNING:
The DFU chassis MUST be grounded. A ground wire must be connected to battery negative,
or to a good chassis ground.
FAILURE TO GROUND THE DFU’S MAY RESULT IN SEVERE
ELECTRICAL SHOCK!
Also, poorly grounded DFU’s may result in poor engine performance,
and can cause engine damage!! Use the drilled and tapped hole next to the yellow connector
for the ground wire. If desired, the unit may instead be grounded at one of the four bolt holes.
However, you will need to scrape off the anodizing under the bolt head. The anodizing is an
electrical insulator, so unless it is scraped down to bare aluminum, it will not provide a good
connection to ground. If more than one DFU is used on a vehicle, each one will require its
own ground wire.
Additionally, make sure that the coil screws are fully tightened at all times!!
4.3 Crank Sensor
The crank sensor uses the two-conductor with shield cable that is inserted into pins 3, 10, and 11 of the
23-pin connector on the XDI. The pins for the sensor side of the harness are crimped to the wire, but the pins
must be inserted into the 3-pin connector (item C ). This is shown in
Figure 10 .
Figure 10
– Crank trigger connections
Figure 9 : 2-Rotor (Mazda 12A and 13B) coil setup.
4 of these coils will be required for leading and
trailing plugs. Leading plugs will go to DFU 1 wiring,
Trailing plugs will go to DFU 2 wiring. Refer to the
wiring diagram layout. 3-Rotor, Odd-Fire and 2-cycle
engines would also use this type of coil.