No power to lambda

1. BertieG Established Member Joined: Oct 2009 exeter, devon Posts: 1224 Clio 172

   #1 2nd June 2012, 15:38

   whilst getting my Predator set up last week, Andy noticed the lambda didnt seem to be reading much. i didnt think much of it, although it was a fairly new NTK sensor
   
   today, i went to fit my new LC-1 wideband, and upon fitting the LED didnt light up. with the aid of a multimeter i found no voltage at all at the plug with the ignition on. checked the fuse, which was blown, but replacing it hasnt made a difference
   
   any ideas why i havent got any power at my lambda plug?
2. Tom5190 Saxperience Post Whore Joined: Sep 2007 Someones Bumhole Posts: 5721 Mk2 16v Desire

   #2 2nd June 2012, 15:41

   Quote:

   Originally Posted by BertieG whilst getting my Predator set up last week, Andy noticed the lambda didnt seem to be reading much. i didnt think much of it, although it was a fairly new NTK sensor today, i went to fit my new LC-1 wideband, and upon fitting the LED didnt light up. with the aid of a multimeter i found no voltage at all at the plug with the ignition on. checked the fuse, which was blown, but replacing it hasnt made a difference any ideas why i havent got any power at my lambda plug?

   You checked the wiring?
3. BertieG Established Member Joined: Oct 2009 exeter, devon Posts: 1224 Clio 172

   #3 2nd June 2012, 15:42

   Quote:

   Originally Posted by Tom5190 You checked the wiring?

   as far back as i can
4. Tontsy Saxperience Addict Joined: Oct 2008 Plymouth, Fiddling - under a two poster ramp Posts: 14064 Audi

   #4 2nd June 2012, 15:45

   Quote:

   Originally Posted by BertieG as far back as i can

   hate to say it . . . but keep going.
   
   seriously though, the wires in the back of the connections just pull out / push in! are they all pushed in enough to make contact?
   
   splice the wire as far back as you can and see if you are getting power at that point.
5. BertieG Established Member Joined: Oct 2009 exeter, devon Posts: 1224 Clio 172

   #5 2nd June 2012, 15:47

   Quote:

   Originally Posted by Tontsy hate to say it . . . but keep going. seriously though, the wires in the back of the connections just pull out / push in! are they all pushed in enough to make contact? splice the wire as far back as you can and see if you are getting power at that point.

   i attached the multimeter to the plug with the lambda unplugged, so i definitely made a connection there. i really cba with checking the loom further back, this entire job has already gone on about 2 weeks longer than i had planned
6. Tom5190 Saxperience Post Whore Joined: Sep 2007 Someones Bumhole Posts: 5721 Mk2 16v Desire

   #6 2nd June 2012, 15:48

   its not hard to check it further back check each pin on the lambda to were it goes. what loom/ecu do you have?
7. BertieG Established Member Joined: Oct 2009 exeter, devon Posts: 1224 Clio 172

   #7 2nd June 2012, 16:01

   single plug, predator ecu. tbh, im hungover and have very little motivation to check the entire wiring loom for faults
8. Tom5190 Saxperience Post Whore Joined: Sep 2007 Someones Bumhole Posts: 5721 Mk2 16v Desire

   #8 2nd June 2012, 16:15

   single plug ecu and loom yea?
   
   you dont need to visibly check anything just check continuity between these plugs:
   
   Pin 2 lambda to pin 11 chassis plug - thats the perm/switched live
   Pin 1 to F11 (im guessing that fuse is still ok)
   Pin 3 to Pin 4 ECU plug
   Pin 4 to pin 22 ECU plug
9. BertieG Established Member Joined: Oct 2009 exeter, devon Posts: 1224 Clio 172

   #9 2nd June 2012, 16:29

   Quote:

   Originally Posted by Tom5190 single plug ecu and loom yea? you dont need to visibly check anything just check continuity between these plugs: Pin 2 lambda to pin 11 chassis plug - thats the perm/switched live Pin 1 to F11 (im guessing that fuse is still ok) Pin 3 to Pin 4 ECU plug Pin 4 to pin 22 ECU plug

   i havent got a continuity tester unfortunately. im really going to have to invest in a decent multimeter
10. Tom5190 Saxperience Post Whore Joined: Sep 2007 Someones Bumhole Posts: 5721 Mk2 16v Desire

    #10 2nd June 2012, 16:45

    well i doubt your going to be able to fix any electrical fault without a multimeter just give it to someone else to fix
11. BertieG Established Member Joined: Oct 2009 exeter, devon Posts: 1224 Clio 172

    #11 2nd June 2012, 16:46

    Quote:

    Originally Posted by Tom5190 well i doubt your going to be able to fix any electrical fault without a multimeter just give it to someone else to fix

    im going to maplin tomorrow to sort out a decent multimeter and give it a go
    
    cheers for your help
12. user_20080 Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.

    #12 2nd June 2012, 17:50

    Have you tried cleaning up the contacts on the lambda plug/s?
13. coleman258 Established Member Joined: Nov 2008 Eastbourne Posts: 2474 Astra van daily Black Saxo VTR 16v'd kent PT51

    #13 2nd June 2012, 18:14

    When up at andys with a mate and his rallye, we had the exact same problem, still havn't found a reason why.....
14. luthor1 Established Member Joined: Jan 2008 Posts: 1802

    #14 2nd June 2012, 18:19

    Lambda only has power when the engine is running
15. BertieG Established Member Joined: Oct 2009 exeter, devon Posts: 1224 Clio 172

    #15 3rd June 2012, 19:07

    Quote:

    Originally Posted by luthor1 Lambda only has power when the engine is running

    dont know why i didnt think about trying it with the engine running, but i gave it a go and all is well, she now runs beautifully
16. luthor1 Established Member Joined: Jan 2008 Posts: 1802

    #16 4th June 2012, 11:35

    what was wrong with it when you first went for a drive in it?