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XDI200 Manual Version 0.1
- Page 24 -
©2017 Electromotive, Inc.
4.2 Wiring ECU & Main Power
The two red/white (red with white tracer) wires on pins 33 and 53 are the switched ignition
power. For redundancy, both red/white wires must be connected to the same sw12V
circuit. The ground wire is 12awg and on pin 73. The reason for the larger/thicker size of the
ground wire is that the ECU is mainly in charge of switching the GROUNDS, not the +12 Volt
power. As an example, coil outputs are all pull-to-grounds. The XDI200 does not use constant
+12 Volt power.
Both red/white 18awg wires, [33] and [53], must be connected to the ignition switch. The
black 12awg wire, [73] of the connector is connected to full time battery negative. See
Figure 15
for a wiring diagram.
If you are using the
XDI200
Power Harness, refer to the next section on installing the
Sw12 Volt Input into the Power Harness.
4.2.1 Power Harness Installation
Electromotive’s Power Harness (PN 070-40000) for the
XDI200
is capable of supplying the
+12Volt high-amperage power required
to run the DFU’s, EGO sensor heater and fuel pump.
Included in the harness is a fuse block wit
h four fuses (ignition, DFU’s, and Fuel Pump are fused)
and two relays to switch the power. Our custom harnesses are all built with the power harness
pre-installed, so wiring them is even more straightforward.
Figure 15
gives an example of a
typical Power Harness installation.
There are three breakouts in the Power Harness:
ECU Connections
Power Inputs
Power Outputs (w/ switched voltage input)
ECU Connections
The
XDI200
Connections are color-matched to the
XDI200
harness.
Light Green 20awg Wire: Connects to [57] (Fuel Pump Relay Ground)
Yellow (from power harness) 20awg Wire: Connects to Sw12v input
Power Inputs
The Power Inputs are color coded in standard fashion:
Two Red/White 18ga Wire in parallel, pin [33] and [53]: connect to (Sw12V
input)
Black 12awg Wire, pin [73]: Connect to Vehicle Battery - minus
Power Outputs (w/ switched voltage input)
The power outputs provide power for the DFU’s, EGO sensor heater, and Fuel Pump. The
switched voltage input is used to turn on the
XDI200
ECU, and should be wired to a +12Volt
source that is activated with the ignition key.
Purple/White Stripe 16awg:
Used for fuel pump if needed
Red/White Stripe:
DFU Power (pin “D” on DFU’s)
Green 16awg:
Fuel Pump Positive and EGO Sensor Heater Positive
Yellow 18awg:
Sw12 Volt Input (for
XDI200
turn-on request)
