HELP! ECU or Lambda Control Unit!!!!

[Ti Kan]

CTDiesel at aol.com writes:
> Well i just spent a few hours seeing whats up with my car.  You all know when
> you have the key on the voltage on the output wire of the O2 sensor is
> ~.45-.51 volts.  Well mine doesnt show anything (zero) and when the engine is
> at idle and you pull the control pressure actuator plug normally you get a
> significant engine lag.  Well mine doesnt anymore.  I cant get any mA reading
> from the cpr either.
>
> So is the ECU shot or the Lambda Control Unit?  ECU is ~$40 and the LCU is
> ~$500

I think there is a confusion of terminology here.

On the 4Kq, what we refer to as the "ECU" is what controls the CIS-E system
and incorporates lambda (OXS) control.  What you're calling the "ECU" is
probably the ignition control module.  It has nothing to do with the
fuel system or the O2 sensor.

Anyway, don't expect the O2 sensor to output any voltage when the
engine isn't running (even if the ignition switch is "on").

-Ti
2003 A4 1.8T multitronic
2001 S4 biturbo 6-sp
1984 5000S turbo
1980 4000 2.0 5-sp
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    ///  Ti Kan                Vorsprung durch Technik
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