pistonsuk

As you probably know from my other post I am working on a circuit to respond to an inexpensive GM knock module and sensor and interfacing with the trim function of the haltech to pull timing.

More Info:

https://www.rx7club.com/haltech-forum-62/building-%2415-knock-sensor-setup-use-e6k-interested-i-need-some-help-508305/

As seen on page 78 of the E6K manual (http://haltech.com/downloads.htm) the trim function allows for +7 to -8 degrees of ignition advance.

I dont have access to my car right know, so I am asking a favor of another E6K owner with a trim module. The test that I need preformed will not damage anything and will take 10min of you time. You will need a running car with an E6K ecu, a trim module and a multimeter.

I need to know how timing responds to the input voltage of the trim function. As stated above this trim function should be able to both add and pull timing. I know the voltage range of the input is 0-5V, what I dont know is what voltages apply to the 0 to -8 degrees of timing.

Test:
1) Plug in your trim module
2) Start you car
3) Set the trim function to "Ignition" (main set up maybe?)
4) Go to the Engine Data Page so the timing can be observed
5) There are three wires on the trim function connector. Probe the "GND" of the trim connector and the "Signal" of the trim connector (refer to the haltech manual to find the colors of these).
6) Watch the voltage displayed on the multimeter as you watch the timing change on the Engine Data Page. (i.e. 2.5-5V = 0 to +7degrees, 2.5-0V = 0 to -8 degrees)
7) Post or email me this relationship

If you have more questions or would like more info on what I am doing pm me your number and I'll call.

Justin

pistonsuk

This is also from Haltech's website. Here is the diagram for the E6K. Probe the black wire with the (-) multimeter lead and the black/white wire with the (+) multimeter lead.

setzep

I'm not sure but logic would tell me that 2.5v would be no adjustment (0 deg), 5v would be +7deg and 0v would be -8deg. When hooking up a POT (trim module) you normally have it so when you turn it clockwise you get more volts and counterclockwise you get less.

pistonsuk

Yes, this would be my thinking too. I would like someone to test it to be sure though.

Maybe someone w/o a trim module could just activate the "Ignition" command under the trim function block. Without the trim module connected the signal wire will read 0V. If the timing goes to -8 then the above mentioned range is probably valid. If the timing goes to +7 then the opposite is true.

Anyone?

Justin