Date: Mon, 13 Jan 2003 15:13:17 -0500
Reply-To: Jay L Snyder <Jay.L.Snyder@USA.DUPONT.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Jay L Snyder <Jay.L.Snyder@USA.DUPONT.COM>
Subject: Re: O2 sensor testing
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Forgot to add, on my '85 (single wire type), the ECU seems to feed 0.5V
into the O2 Sensor loop until it starts generating its own current signal.
Then it cycles up and down based on the exhaust gas content. I only found
this out by attaching a voltmeter to the spade connection with the O2
sensor still attached. I hope this is normal? My 1.9l with the Euro
Digijet ECU runs leaner with the O2 sensor disconnected! I need to look at
this some more. I do have the AFM leaned out 4 notches. It seems like the
ECU fattens it back up.
Jay
Jay L Snyder/AE/DuPont@DuPont@gerry.vanagon.com> on 01/13/2003 02:57:27 PM
Please respond to Jay L Snyder/AE/DuPont@DuPont
Sent by: Vanagon Mailing List <vanagon@gerry.vanagon.com>
To: vanagon@GERRY.VANAGON.COM
cc:
Subject: Re: O2 sensor testing
It puts out a DC voltage from 0 to about 1VDC. Normal mixtures should
read 0.5 to 0.7VDC. Bad sensor will show no volts and the ECU will run
open loop, which ususally means rich. Higher voltage indicates rich
mixture, low voltage is lean.
Jay
Dave Baker <DBAKER5@KC.RR.COM>@gerry.vanagon.com> on 01/13/2003 02:47:56 PM
Please respond to Dave Baker <DBAKER5@KC.RR.COM>
Sent by: Vanagon Mailing List <vanagon@gerry.vanagon.com>
To: vanagon@GERRY.VANAGON.COM
cc:
Subject: Re: O2 sensor testing
Check the archives. I'm sure there are a bunch of posts on this topic. I
don't have my Bentley in front of me so can't tell you the voltages for
sure. Basically, once the sensor is hot the voltage rises as the mixture
gets richer. (I think)... Check the archives to be sure.
Dave in KC
85 Westy
----- Original Message -----
From: "Alan Gondry" <agondry@ATTBI.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, January 13, 2003 12:18 PM
Subject: O2 sensor testing
Is there a way to check if the O2 is operating under normal parameters?
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