Date:         Wed, 17 Feb 1999 07:58:42 -0600
Reply-To:     Darrell Boehler <midwesty@MIDWEST.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Darrell Boehler <midwesty@MIDWEST.NET>
Subject:      Re: hesitations (air flow meter)
Content-Type: text/plain; charset="iso-8859-1"

Hi Kai,
    I am obviously in complete agreement  with the expert at bosch. Checking
the afm (air flow meter) wiper voltage reading is a better test than
checking resistance per bentley.  One of the analog voltages monitored with
a digitool is the afm wiper voltage.

Darrell

-----Original Message-----
From: Kay O Fremgen <kayfremgen@JUNO.COM>
To: vanagon@GERRY.VANAGON.COM <vanagon@GERRY.VANAGON.COM>
Date: Tuesday, February 16, 1999 11:47 PM
Subject: hesitations (air flow meter)


>Hi Darrell,
>
>This information came direct from a technician who works the Bosch Tech
>Line 1-800-521-5462.
>According to the technician this is the better way to test the
>potentiometer since this is the actual voltage factor that the ECU uses.
>The ECU sends a reference voltage of 5 volts through the AFM. The
>resistance of the potentiometer is dependent upon the position of the air
>vane. And in result the voltage factor that returns to the ECU is used to
>determine the amount of air that is entering the motor at that time.
>
>Give them a call they are very friendly
>Kai
>
>
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