Re: [DML] Frequency valve

["chris" <chris@xxxx>]

Hi list

I checked the frequency valve by connecting negative on the voltmeter to the
engine, and positive to the +12v on the frequency valve, and there is 12v
present. now can i connect the positive to the battery + and negative to the
other connection on the frequency valve to check the ecu connection?

thanks

Chris vin 16327


----- Original Message -----
From: chris <chris@xxxx>
To: <dmcnews@xxxxxxxxxxx>
Sent: Monday, November 13, 2000 5:11 PM
Subject: [DML] Frequency valve


> Hi list/DMC joe
>
> I was reading a manual published by Bosch, which covered K jetronic,
> which said the frequency valve recieves a constant 12v feed and the
> ECU pulses the ground. If i connect a voltmeter across the terminals,
> i should get a pulsing 12v? correct?. If there is 12v across the
> valve, if i connect 12v direct i should be able to feel/hear the
> valve clicking?. When the valve has no power i assume it is shut,
> which mean if its not working the engine will run rich? Could this
> cause the cat to glow red?
>
> If there is not 12v at the valve I should check 12v at the lamda
> relay which runs to the frequency valve? and continuity of both 12v
> and negative from the ECU to the valve?
>
> If the Lambda sensor is not working or disconnected i assume the
> valve just work as it should when could on a fixed ratio? This should
> eliminate the sensor if its causing a problem?
>
> Thanks
>
> Chris Vin 16327
>
>
>
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