Haltech HT045505 - Manual (Page 7)

In Cabin Wiring
The In cabin wiring is made up of multiple inputs and outputs.
Correct connection of these wires is essential for proper operation of the harness.
All wires have been labeled and required cables should be connected as outlined below.
Figure 3 – In Cabin harness wiring
Auxiliary Air Control Valve (AAC)
The Auxiliary Air Control Valve (AAC) is used to control the Idle speed of the engine.
Connect the AAC labeled wires to the AAC valve. (Polarity not important)
The AAC is controlled by Digital Pulsed Output 17 (DPO17) on the Haltech Sport ECU.
Fuel Pump Output (Fuel Pump +15A Max)
The Fuel Pump Output can be connected directly to the positive (+) side of the
fuel pump and is fused via fuse 4 within the fuse box. This output is limited to 15A
continuous current draw.
If large pumps or twin pump setups are required please use this output to trigger a relay
capable of supplying the current required for your setup.
Spare Digital Pulsed Output (DPO-1, DPO-2, DPO-3, DPO-4, DPO-18)
Spare Digital Pulsed Outputs are located throughout the terminated harness
When the output is activated by the ECU the output will switch to ground.
Solenoid valves and shift lights etc can be run directly from the output, however high
current devices such as thermo fans and additional fuel pumps must be activated
through a relay. A Relay can be wired between the DPO and the supplied +12V DC on
the connectors. This way the output is only switching the relay and not a high current
draw device.
The Digital Pulsed Outputs are limited to 800mA Max current draw.
Analogue Voltage Inputs (AVI1, AVI6)
The Analogue Voltage Inputs can accept variable voltage inputs from 0V to 5V.
These inputs can also accept switch inputs that change between two different voltage
levels. The on voltage and off voltage define what the thresholds are between the on
and off states. The voltage can be viewed as a channel in the ECU Manager software
to determine thresholds for a switched input.
The AVI-1 and AVI-6 labeled wires are spare Analogue Voltage Inputs.
These inputs can be programmed within the ECU Manager Software to read variable
voltage inputs such as:
• 02 Sensors
• Pressure Sensors
• Temperature Sensors
• Various Switches
For a full list of input options and explanations please go to the help within the
ECU Manager Software.