Haltech E8 User Manual

Page 17

Haltech E11/E8 Instruction Manual

Because the output from a hall effect sensor is already in digital form the ECU does not need to do any
signal conditioning to be able to use it.
When given the option a hall effect sensor is always the best option to put on an engine and it reduces the
amount of work required of the ECU.
In applications where either direct fire ignition or sequential fuel injection is required the ECU must have a
way of determining where it is in the firing order at any point in time and which cylinders are on
compression and which are on exhaust. The only way of determining this is to use a sensor connected to
the camshaft that sends a signal to the ECU when the engine is approaching cylinder 1 TDC on the
compression stroke.

Flying Leads

Locate and connect the following flying leads.

Black (Ground)

Locate a good chassis ground point or the negative terminal of the battery and connect the black wire.

Red

(Battery Supply +12V) Locate a source of continuous +12 volts and connect the red wire. Connecting
direct to the positive battery terminal is suggested.

Grey

(Ignition Switched +12V) The grey wire is used to control the operation of the Haltech ECU power relay. It
needs to be connected so that it sees 12V only when the ignition switch is on and during cranking. This
wire does not draw a large amount of current (< 0.5A). Do not connect to the accessory outputs of the
ignition switch.

Orange

The two orange wires are used to operate the fuel pump. When the Haltech ECU wants to operate the fuel
pump it will close the fuel pump relay connecting the two orange wires together. The diagrams show two
examples of wiring the fuel pump. Do not add extra relays to the fuel pump circuit.

Figure 12 - Fuel Pump Wiring

It does not matter which example is used.
Both will operate correctly. Note that the
orange wires are connected internally
within the loom when the relay is closed.
As a result it does not matter which
orange wire is used to connect to the fuel
pump.

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This manual is related to the following products:

E11V2