diy-EGOR

[Bruce Plecan]

Has anyone figured out what for sure the resistor that is molded in to the
connector is used for?.
Or has any tried gathering the various values?.
Anyone interested in trying to?

Last I heard, there wasn't even a memory clear procedure when changing
sensors on the oem Application.   Seems like as more are built we can start
to use fixed values on things.
There just has to be a set of fixed values, IMO, for all of the pots, I mean
Honda is actually doing it..

Thanks
Bruce







>
> Before hooking up that expensive NTK to your newly built circuit,
> it is nice to be able to test it out. I have a heater circuit built and
> did the setup and test this way.
>
> Use a 3.3 ohm (or there-abouts) resistor of 5 to10 watts in place
> of the NTK heater. Setup a current meter in series with this resistor.
>
> Power up the circuit and set pot R19 (or R15?) for a current
> of 1.2 A. (this is the 'current limit' pot).
>
> Change 3.3 ohm to a 10 ohm resistor (or add in a 5.6 ohm). Setup
> a volt meter to read the voltage across the 10 ohm resistor. Adjust
> R20 to give 10.0V across the 10 ohm load resistor.
>
> The Vss_volt_adj (Q7-C) should be low (< 0.6v) with the 10 ohm
> resistor. And should be > 5v? with the 3.3 ohm resistor load.
>
> If you have a regular 'ole heated O2 sensor around, it can be used
> to do a final test of the circuit. Hook up the heater only and power
> up the system. By monitoring the heater volts & amps, along with
> the Vss_volt_adj, make sure that the heater current never goes
> above 1.2A, and the heater voltage nevers goes above 10.0v.
>
> As the heater heats up, the voltage will increase until it reaches
> 10.0v, then current will drop maintaining the max of 10v. At the
> 10v trip point, the Vss_volt_adj will also go low.
>
> Once I have the Ip circuit built, I'll see what can be done for setup
> and test there. This one looks to be a mite more difficult.
>
> hth's,
>
> BobR.
>
>
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