Volvo RWD 200 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 11/2000 200 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

Tracking down ECT issue with ohm and v readings 200 1992

posted by  Philip on  Tue Jan 29 12:21 CST 2013
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Thu Oct 23 10:21 CST 2014
[RELATED]

The care dies from idle if you give it gas until it warms up. The codes say it is the ECT. I replaced the ECT sensor with a URO. No change.

I then back measured from terminal 13 to 5 and got 6.05 volts with the ignition switch on. With the connector unplugged from the ECU, I got 8,200 ohms between 13 and 5.

So does this point to digging into the wiring harness below the 2 and 3 intake manifold and looking for the cold joint on the ground (described by a post on the Brickboard), or looking elsewhere?

Any help would be greatly appreciated.








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    Tracking down ECT issue with ohm and v readings 200 1992

    uid 27's pic
    posted by  Art Benstein on  Tue Jan 29 14:45 CST 2013
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Fri Oct 17 20:10 CST 2014
    [RELATED]

    Looks like you're on to something. Measuring 6.05V between 13 and 5 is a very unlikely thing. Would you please describe exactly how you are making the measurement.

    If you suspect the ECU isn't getting grounded, then measure between 5 and a nearby chassis ground, under the same conditions. If OK, repeat your voltage measurement with the connector removed from the ECT. Post the results.
    --
    Art Benstein near Baltimore

    The short fortune-teller who escaped from prison was a small medium at large.








    •   REPLY TO THIS MESSAGE    PRINT   SAVE 

      Tracking down ECT issue with ohm and v readings 200 1992

      posted by  Philip on  Tue Jan 29 15:55 CST 2013
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
      last visit: Thu Oct 23 10:21 CST 2014
      [RELATED]

      Original measurement: probe on the back of #5 (black) and other probe on #13. Connector connected to ECU, ignition switch to position II.

      #5 to chassis shows it is grounded.

      Removed connector from ECU. Ignition switch to position 2. Voltage from 5 to 13 shows 6 v.








      •   REPLY TO THIS MESSAGE    PRINT   SAVE 

        Tracking down ECT issue with ohm and v readings 200 1992

        posted by  Philip on  Tue Jan 29 16:18 CST 2013
        Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
        last visit: Thu Oct 23 10:21 CST 2014
        [RELATED]

        There are two blue/red wires that come out of the ECT Connector. One goes to #13, the other is a ground? When I measure the resistance from the other one (that does not go to #13) to the negative on the battery, my ohmmeter shows 164 on the 20k scale.

        So I am right in thinking this is a bad ground?







<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

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.