RWD - No Oxygen Sensor signal at ECU, 89 240

Volvo RWD 200 Forum

INDEX FOR 4/2014(CURRENT) INDEX FOR 4/2012 200 INDEX INDEX (NO RELOAD) [<<]  [>>]

 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE   A    A 

No Oxygen Sensor signal at ECU, 89 240 200

Thanks for confirming that.

Now I've noticed that I can pull the #4 fuse and nothing changes in the way it is running.

So I followed the yellow/red (+) wire from the O2 sensor back to the fuse block. It turns out there is a short in the wire somewhere behind the dash.

What is odd is that #4 fuse has 14 volts when running AND has continuity to ground. Why isn't something smoking? Why isn't the fuse blowing?

I disconnected the O2 sensor wire (yellow/red) from the #4 fuse block and also pulled the wires apart at the O2 sensor. This eliminated the short.

Then I directly connected the O2 sensor to a known good voltage supply and measured the voltage across the sensor to be sure. So the pre-heater is working and the short is removed from #4 fuse block.

Still runs exactly the same.

 





[about brickboard ads]

THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New No Oxygen Sensor signal at ECU, 89 240 [200]
posted by  LoveMy240Wagon  on Sat Mar 31 10:38 CST 2012 >

[about brickboard ads]

Cut and paste link:

<< < > >>


Users marked in green are currently online.

©Jarrod Stenberg 1997-2012. All material except where indicated.


Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.

All participants agree to these terms.
Powered by Denizen - Custom Software for Enthusiasts