1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. Welcome To LandyZone!

    LandyZone is the biggest Land Rover forum on the net. We have plenty of very knowledgable members so if you have any questions about your Land Rover or just want to connect with other Landy owners, you're in the right place.

    Registering is free and easy just click here, we hope to see you on the forums soon!

TD5 wont start!

Discussion in 'TD5' started by AshStevens, Oct 18, 2014.

< Previous Thread | Next Thread >
  1. AshStevens

    AshStevens New Member

    Joined:
    Oct 18, 2014
    Posts:
    4
    Likes Received:
    0
    Hi all,

    I'm new here, I have recently just purchased a 2003 Disco 2 TD5 commercial but its developed a couple of problems, some of them ive sorted but I cant figure out why it wont start now!

    I realised the day after getting the vehicle home, it didnt start very well from stone cold, it would crank over for around 10 seconds then fire up and would start on the button every time after its initial cold start.

    I borrowed a Snap On diag machine and had a noisy crank sensor fault recorded and doesnt start atall now! Turns over nice and fast, fuel pump primes and stops after a minute or so.
    I checked the common oil in ecu problem and it had signs of oil. I removed the ecu, drained any signs of oil, cleaned all the connectors blocks and replaced the injector harness under the rocker cover. It didn't start still so I purchased a new crank sensor and fitted that this morning and still doesnt start.

    on the Snap on diag machine the crank sensor was reading 0 rpm on crank and would sometimes jump to 30rpm.

    I believe the problem has to be the crank sensor not showing the ecu its cranking and hence wont start.

    Has anyone come across this problem before and if so where was the fault located? Im thinking either oil in the engine harness or ecu at the moment.

    Ive searched the internet and forums for starting issues but cant find any specific threads related to this problem

    Many thanks Ash
     
  2. Silverlandy

    Silverlandy 3.5efi's other half

    Joined:
    Jan 16, 2012
    Posts:
    5,707
    Likes Received:
    209
    Location:
    Suffolk
    Hi ash

    You should introduce yourself first in the intro section ;)


    Mine has done this before and needed new glo plugs but don't ask me anything about it as I know bugger all and the garage fixed it.

    Hope that helps :)
     
  3. AshStevens

    AshStevens New Member

    Joined:
    Oct 18, 2014
    Posts:
    4
    Likes Received:
    0
    i will do an intro thread shortly. :)
     
  4. Silverlandy

    Silverlandy 3.5efi's other half

    Joined:
    Jan 16, 2012
    Posts:
    5,707
    Likes Received:
    209
    Location:
    Suffolk
    :). Welcome to the forum.
     
  5. sierrafery

    sierrafery Well-Known Member

    Joined:
    Jun 30, 2007
    Posts:
    14,614
    Likes Received:
    2,421
    Location:
    West of Transylvania
    Last edited: Oct 18, 2014
  6. AshStevens

    AshStevens New Member

    Joined:
    Oct 18, 2014
    Posts:
    4
    Likes Received:
    0
    Still can't find why the crank sensor isn't reading any rpm on crank. Trawled through so many threads!
     
  7. johnlad

    johnlad Well-Known Member

    Joined:
    Jan 7, 2010
    Posts:
    5,462
    Likes Received:
    922
    Location:
    Blackpool
    sounds like you need a new crank sensor
     
  8. AshStevens

    AshStevens New Member

    Joined:
    Oct 18, 2014
    Posts:
    4
    Likes Received:
    0
    As above I've already replaced it
     
  9. sierrafery

    sierrafery Well-Known Member

    Joined:
    Jun 30, 2007
    Posts:
    14,614
    Likes Received:
    2,421
    Location:
    West of Transylvania
    continuity check on the wires from the plug to ECM, though double cheking with a dedicated LR tool(hawkeye, nanocom, lynx, etc) would be good before that... if there's still residual oil in the red plug it could make tricks too
     
  10. Ruari

    Ruari Active Member

    Joined:
    Mar 17, 2010
    Posts:
    281
    Likes Received:
    0
    Location:
    North Ayrshire
    Hi

    I had the same problem this time last year. Without a crank reading the engine will not start, it will just keep turning over.

    As you have replaced the ranks sensor it only leaves 2 the problems:
    1. The wires for the sensor are damaged. You can check the continuity of the wires at the ecu plug. I did this by soldering a 2 wires each to a sewing pin. I then inserted the pin through the wire. From this I could put the multimeter on it to check the readings. I also unplugged the crank sensor and did the check to make sure they weren't shorting out.
    For me this all checked ok.
    2. I took the lid off my Ecu, it was quite obvious the problem from water. What you could do is try your ecu in another Disco ( i don't think it works in a defender). But first, write down the injector codes from both your car and the test car. You can get injector codes by either lifting off the rocker cover or with diagnostics, read the codes. When you plug your ecu in to the next car, you will need a diagnostic machine. 1. Learn securtity. This codes the ecu to the 10as alarm unit. 2. program the injector codes.

    Sounds complicated, but really its not. As above you will need nanocom, hawkeye etc.

    I use the hawkeye. For this you don't need a pc or anything else unlike the early nanocom.

    If its ecu, I got a cheap one off ebay with the same code. They are either the early MSB or the later NNN. Ideally a NNN is better and can be reprogramed.

    I feel you pain.
    Mine has just packed in AGAIN!
     
  11. eightinavee

    eightinavee Well-Known Member

    Joined:
    Jan 21, 2006
    Posts:
    3,956
    Likes Received:
    59
    Location:
    UK.
    Starter motor.
     
  12. Ruari

    Ruari Active Member

    Joined:
    Mar 17, 2010
    Posts:
    281
    Likes Received:
    0
    Location:
    North Ayrshire
    It is known for a faulty starter motor to draw to much current. in doing so the voltage going to the ecu is below the threshold, (App. 10.5v). If this is the case then the ecu shuts down. Jump starting or bump starting may help diagnose this.
     
  13. eightinavee

    eightinavee Well-Known Member

    Joined:
    Jan 21, 2006
    Posts:
    3,956
    Likes Received:
    59
    Location:
    UK.
    The starter usually causes a cranking but no start situation because it sufferes from internal arcing.These sparks send nasty spikes back up the main feed cable,they are strong enough to corrupt the crank sensor signal and confuse the engine ecu.
     
  14. Ruari

    Ruari Active Member

    Joined:
    Mar 17, 2010
    Posts:
    281
    Likes Received:
    0
    Location:
    North Ayrshire
    I stand corrected to some degree. I do recall this.;)
     
< Previous Thread | Next Thread >