Connecting Ignition to a DetCon

Overview

The EMIT ignition system can be linked to a MotorTech (TM) DetCon controller, and the data from the DetCon can be used to retard individual cylinder timings of the ignition. This page describes how to set up and use this feature.

Installation

Install the DetCon as specified in the Motortech instructions. Important notes and clarifications:

1. The knock sensors are wired in firing order. The "Sensor 1" input on the Detcon will wire to the knock sensor on the first cylinder that fires, "Sensor 2" will wire to the second cylinder that fires, etc.
2. The MotorTech-provided software (DenEdit) is used to set up the DetCon module. The software should come with profiles that cover many common engines.
3. In DenEdit, make sure the CAN setup is at ID #1
4. The ignition sensing unit (ISU) will be used to trigger off cylinder coil #1. The MotorTech instructions show how to wire.

Special Wiring

Aside from normal wiring instructions, a CAN connection will be made between the DetCon and the DCT "ECU CAN" port. Wire the DetCon CAN Hi,Com,Lo to the DCT 21,19,20.

The "Trip" pin should be wired to a relay that has an output contact connected to an annunciator shutdown input for knock level.

Setup

DetCon

The DetCon will be set up first using the Motortech-provided software. Most options will be filled in by the engine parameter file. On the "Output options" tab, set the "Immediate stop limit" to the alarm limit that will trip the "Trip" pin and shut down the engine (through the annunciator). The following settings will not be used:

• Ignition reduction limit
• Decrease ramp
• Timing reduction gain
• Maximum output value
• Delay after load reduction
• Reverse analog output

EDT

The EDT will be configured to accept data from the DetCon. On the DCT, navigate to Setup - Engine Data Translator, and select the mode "Motortech Detcon", and submit. Afterward, the home page EDT slide should show the readings from the DetCon, and should show the status "Receiving CAN data".

Ignition

To setup the DetCon link and knock algorithm, navigate from the Ignition home tab to Setup -> Detcon Link. The page is shown below.