Obd2 Fault Code Reader - No Faults But Car Won't Start !!?

[Supermooser]

I bought a universal OBD2 car fault code reader/eraser as my X5 won't start, (2001 4.4i V8 Petrol Auto).

Specifically - the starter motor will not fire/it will not crank. I used the fault code reader today and it told me (after searching), that there are no faults presently stored on the cars computer!

Does this make sense/mean anything to anyone - considering my non-start problem!?

I've been trying to get help with this problem for a while on here. If you need more detail see:

[Guest Mister Dabsy]

If your model still has the Jump/Positive under the bonnet then run a wire to the starter solenoid !! Just to test that it will spin (out of gear obviously).

If you have a battery under the hood then try the same lol

BTW Cameron... You would've been better off staying with the original post on this issue as it may become confusing with several different entries/topics !

[Supermooser]

If your model still has the Jump/Positive under the bonnet then run a wire to the starter solenoid !! Just to test that it will spin (out of gear obviously).

If you have a battery under the hood then try the same lol

BTW Cameron... You would've been better off staying with the original post on this issue as it may become confusing with several different entries/topics !

Thanks Dabsy. I'm going to try this today. I put the car on axle supports last night and went to remove the under plate so I could get at the starter/solenoid today. Manufacturers don't half make things purposefully difficult though hey! The bolts had un-welded nuts behind the plate that obviously just span when I tried loosening the bolts. It's virtually impossible to secure the nuts with a spanner behind the plate. Then 2 off the bolts/nuts were completely random different sizes....etc etc. ahhh! Anyway - got there in the end! Makes it much harder operating without a pit I suppose. Anyway, thanks again - let you know how |i get on :blink:

[Supermooser]

P.s point taken Dabsy - sorry. For some reason I always presume no one will respond so I try a scatter gun effect :unsure:

I shall stay on one topic/thread now :D

[Supermooser]

Can anyone help with this - there is one thing I can't find out to do with the solenoid.

There are three bolts on the solenoid. One has the fat red cable coming from the battery (+). Another has an exposed mesh cable which has a permanent connection seemingly running up to the starter. I cannot tell what the third bolt is without removing the starter/solenoid.

So...

Is the permanent exposed metal mesh cable connection that runs from the solenoid up toward the starter; an earth (-) cable connected to the bare metal exterior of the starter motor, OR; a live (+) cable running from the solenoid up to stat the starter motor???

Obviously a bit of a difference

[X5 Wayne]

I have heard that the park sensor can fail on the gear box try the car in neutral and see if is starts.

[Guest Mister Dabsy]

Can anyone help with this - there is one thing I can't find out to do with the solenoid.

There are three bolts on the solenoid. One has the fat red cable coming from the battery (+). Another has an exposed mesh cable which has a permanent connection seemingly running up to the starter. I cannot tell what the third bolt is without removing the starter/solenoid.

So...

Is the permanent exposed metal mesh cable connection that runs from the solenoid up toward the starter; an earth (-) cable connected to the bare metal exterior of the starter motor, OR; a live (+) cable running from the solenoid up to stat the starter motor???

Obviously a bit of a difference

The Fat Red is Permanent live feed... The exposed Fat braided cable is the Negative... The third should be the swithed live to activate the solenoid to spin the starter...

HTH

[Supermooser]

Yipeeeeeee - problem resolved!

Thank you everyone for your help. I’m so glad I can finally stop pestering you all lol.

I’ve been so encouraged by your help, and learnt so much about BM’s over the duration of this problem (6 weeks), and since owning it (2 years), – I will replace the X5 for another BM. I’d miss you guys to much otherwise haha!

Anyone who finds any of my threads/topics relating to the problems I’ve had on here with the X5, or any other X5/BMW problems - PLEASE feel free to ask if you think I can help.

I’ve probably learnt so much because I’ve tried to resolve as many of the long list of problems I’ve had with my X5 myself. Mostly to avoid large garage/mechanic bills. I have to say, having said/done that - my parts/mechanic bills etc have amounted to £4k+ over the last two years, or more. It’s also depreciated between 4-6k over the last two years. I suppose that means they can be bought very cheaply these days though. 60k car for about 6k – incredible!

Anyway, I’m not a mechanic/auto electrician/expert like a few other guys on here, but as I say, I’ve learnt a hell of a lot about the BMW X5 over the last 2 years. Especially as it’s 2001 and 100k+ miles. I’ve also found a lot of useful sites like BMW part number finders etc.

I found this site by searching for related key words on Google. I learnt a lot reading about other people’s problems - for which I am very grateful. For that reason I will explain what I discovered the problem to be here, and hopefully help someone else :rolleyes:

A while ago the alternator seized. This is a big problem for the X5 as it is a water-cooled alternator. Because the alternator seized, the water pump failed to function properly. I was driving on a motorway and I could not pull over! The car over heated to the extent that I blew a hole and leaked all my coolant fluid out of the radiator. The power steering then failed as well. Because I continued to drive, the car overheated to the extent that the engine head was likely to have warped, which would have pretty much written off the car/required new engine/etc. I needed replace/repair the car cooling system/damage caused, which included the: radiator; power steering pump; alternator; water pump; drive belt; etc, - to find out if the car was written off!

The reason I mention this is because I think this is the source of my recent non-start problem. I also have to say it would have been almost impossible for anyone to diagnose this recent problem without getting under the engine/behind the plate.

I had a garage replace the alternator, as it’s a nightmare to get to/replace. They have presumably removed the starter/solenoid to get to it. After replacing my alternator, they did not re-secure the starter/solenoid properly. The starter motor and solenoid are secured to the car with a few bolts, which also connect/earth the starter/solenoid, allowing it to work. Because the garage did not replace these bolts securely, there was no earth (-) connection, and the starter/solenoid could not work, or worked intermittently depending on the state of the connection at the time.

This is why connecting the live battery terminal directly to the various terminals on the solenoid/starter had no effect. At least there are no more parts to replace!

Amazing that a ‘professional’ mechanic re-installed the starter so poorly. I shall have words with the garage I think.

Anyway, there we go. Thanks again everyone :D