Haltech E8 3SGTE PNP Outputs

The Haltech E8 comes with four ignition drivers, four PWM outputs, and two auxiliary outputs. All can be used as general-purpose outputs. As configured for 3SGTE PNP use, one ignition driver, four PWM drivers and both auxiliary outputs are used, as per the following table:

As configured, you can use any of the three spare IGN drivers to control any ≤ 1A 12v PWM or switch-to-ground output (e.g., fan control, shift light, etc).

Need more outputs?

If you need more outputs (e.g., you want to run a COP ignition, boost control and fan controls), you have several easy options to increase the number available.

1. PSCT Control. This is the easiest way to free up a spare output. All this output does is ensure the power steering pump does NOT run if the engine is off (and the key is turned to the On position). Disconnecting PSCT would cause the PSCT pump to start when the key is in the On position. Contact us for other PSCT wiring alternatives.

2. IAC valve. The 3SGTE IAC uses one coil to open and one coil to close - hence it requires two outputs to control. Many IACs require only one output (a coil to open, a spring to close). Call us, we can supply you with a suitable valve. A cheaper, but less elegant, way to control the IAC with one output is to wire a 20V 35-50ohm resister from RSC to ground (we have these also). This will default the IAC to closed, and will provide enough resistance to allow the RSO (open) control to manage the stock valve.

3. TVIS and/or EGR*. Obviously, if you do not use one or more of these circuits the output will be available for use.

4. O2 Heater circuit*. On the 3SGTE interface board, there is a jumper labeled JHTR. Moving the pin from 2-3 to 1-2 will cause the O2 heater circuit to be always on when the engine is running.  Alternatively, you could leave the jumper open (no O2 heater). Finally, if you use a wideband sensor with external electronics (such as an Innovate LC-1), O2 heater control will be managed by the wideband sensor electronics.

* Modifications to these circuits are legal for off-road use only.