More ABS related problems - '97 300TDi

[stageonesimmo]

Anyone ever had a 300Tdi Disco that has the ABS diagnostic socket in a wierd place - i.e. not under the drop-down panel under the steering wheel?

I'm [!Expletive Deleted!] if I can find mine.

I've got an OBD socket with the wire colours in it that should be in the ABS socket, but I cant get the lamp to go into blink mode using it so I need to find the ABS diagnostic socket, but its not where it should be, or anywhere else for that matter!  I've checked every possible location for the thing and cant find it.

So, I either have one, its just not not obvious where it is, or I dont and I need to be shorting out some other wires and not the black and black/pink that I'm trying at present.

Any ideas anyone - locations for the ABS socket or the wire colours I need for use with the OBD socket to make the lamp blink the codes out.

I really need the codes cos re-seating the front sensors hasnt worked this time and now the lamp wont go out for more than 20 yards but I need to figure out the fault before I can fix it - and yes, I'm too tight to get it plugged in somewhere............

[Range Rover Blues]

I think that if you have an OBDII plug then the ABS diagnostic plug is superceded.  If I remeber I'll have a look at the manual for Rovacom, it migh shed some light.

At the same time, I struggled for ages to find the engine ECU plug on my soft dash, it was wrapped up with the loom and had never been used, I had to lift the loom up to untangle it.

[stageonesimmo]

Thanks to cpix2 over at LR4x4 forum for the following snippet of info:

There is no ABS diagnostic socket starting with 1996 MY. The diagnose is carried through the OBD port (which the ABS ecu is connected to).
Ground pin 15 on the OBD connector, which should correspond to a Light Green Red wire (or connect pin 15 to pin 5 - which is Ground and it's a Black wire) then put the key in the ignition and turn it to position II (the position before cranking the engine).
It should work according to TSB and wiring diagram.

But, heres the story:

I disconnected the ABS Warning lamp relay with the ignition off then turned on the ignition and put a split pin between the connections you suggested above and it worked. Now for the weird stuff.. I could only get the code 1: 2 no others I even put the relay back in and drove it so the lamp would come on and re-checked - still 1: 2. That code doesn't exist in any of the lists I've seen so I have no idea what it means.

So, I put the realy back in and drove around the estate a few times aiming at the speed bumps at an angle then noting which wheel made the lamp come on, stop, ign off and start again aiming for the next bump at an angle. Every time it was the passenger rear that made the lamp come on as it hit the speed bump. I took a small amount of play out of that bearing (as in absolutely tiny amount) and hey-presto, all is well!

So what does 1: 2 mean?
How many codes are stored cos I read it about 50 times!
How do I know when the memory is empty?

Still at least its done now and I now know, thanks again cpix2, how to read it in future - just hope next time I get some codes that actually mean something!

[Range Rover Blues]

On the system I'm familiar with it logs each fault into memeory even if the fault goes away.  Every time you remove the split pin and let it finsh the blonk code that code is then cleared, so you might not be letting it clear properly.  Once it's cleared I get the one long, one short then nothing for about 30 seconds, ie 0-0 blinks.

[stageonesimmo]

RRB,

I've tried letting it go on and on then pulling the link, pulling the link as soon as it goes into blink mode then not relinking it untill the lamp stays on (after the short/long blinks), turning the ignition off after pulling the link when its back to on constantly, basically every combination I can think of to get it to go to the next code, but it still insisits on blinking 1:2 every time.  I'm up to about 80 'reads' now and every one of them has been 1:2.

I'm starting to think that with the OBD2 system there must be some thing else needs to be done to get it to move on, or as cpix2 over on LR4x4 says - 1:2 may well be the ECU's way of telling me that I cant read the codes this way and need to plug it in to test-book or similar?.............

[Range Rover Blues]

Is it 1 long then 2 short? is that follwed by a very long silence?

It might be that the codes are different, but there will always be a 'start up' code which IIRC is 1 long, 1 or 2 short before the fault code :-k  so it may be you are looking at a 'blank' memory now.

The good news is that OBDII should be readable by any garage equipment, not just a main stealer.

[skip]

It's cheaper to buy an OBDII reader from ebay. Beats paying £30-40 every time you want it plugged in.

http://cgi.ebay.co.uk/OBD-II-2-OBDII-PC-SCAN-TOOL-FAULT-CODE-READER-SOFTWARE_W0QQitemZ160219865649QQihZ006QQcategoryZ30921QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

http://cgi.ebay.co.uk/GS300-Diagnostic-OBD-Reader-Scanner-OBD2-KKL-OBDII-2-II_W0QQitemZ220188647181QQihZ012QQcategoryZ30921QQrdZ1QQssPageNameZWD1VQQ_trksidZp1638.m118.l1247QQcmdZViewItem

There are loads of different ones to look at.

[stageonesimmo]

RRB,

Nah, its definately a 1:2 code - it follows the short/long series that comes with every code and is followed by those again to end with.

\skip,  I might just look into one of those.  I have to pull the sump off and re-seal it then change the RH tracta seal so I've got enough to do for now.  I'm going to add a new ABS warning lamp relay to my shopping list as I have more problems when its cold and switching the ign off and on gets teh lamp to stay out 99% of the time so to be sure I'm gonna swap the warning lamp relay so I can discount it (I've used the similar green relay in the same location and I get less problems with that so I may well be on the right track with that - its just annoying that I cant seem to get any meaninfull codes out of the thing!

Ho hum, If I wasnt doing this I'd be bored on my 2 weeks off now wouldn't I..........

[Range Rover Blues]

It might be worth a code reader then as another thing I remember is that Rovacom gives up different interpretations of the codes than the blink test, sometimnes in more detail.