G

GDM

Active Member

• Apr 27, 2013

• #1

A friend has a 300 Tdi which he bought with a 2" suspension lift kit already fitted. The previous owner had disconnected the ABS wires to allow for suspension articulation while off-roading.

The car is now due for it's MOT so we have reconnected the wires but how do you get the ABS system to re-set itself and extinguish the light?

 

Fizzer

Active Member

• Apr 27, 2013

• #2

My ABS light was on for the mot. the tester said as long as the light wasnt showing he didnt mind how I extinguished it. in fact his suggestion was a piece of tape. I took the bulb out and he passed it. Its a 1996 300tdi

 

Mark L

Well-Known Member

• Apr 27, 2013

• #3

I removed the bulb from mine also.

 

bencorkill

Well-Known Member

• Apr 27, 2013

• #4

Hammer

 

G

GDM

Active Member

• Apr 27, 2013

• #5

Taking the bulb out is a possibility. I had heard that it should reset after driving for a couple of miles but it failed the MOT on various things (including rust) and it is only going to be possible to do the couple of miles on the way to the re-test.

 

200tdi ayre

Well-Known Member

• Apr 27, 2013

• #6

Shouldn't pass with a iluminated light or bulb removed as it is part of the procedure to check lights before starting and whilst running but you'd probably get away with taking the bulb out

 

G

GDM

Active Member

• Apr 28, 2013

• #7

Put a fault code reader on it today and there are no ABS faults logged. Strange!

 

nrgserv

Well-Known Member

• Apr 28, 2013

• #8

http://www.landyzone.co.uk/lz/f8/disco-1-300-tdi-abs-diagnostics-headache-117078.html

 

G

GDM

Active Member

• Apr 28, 2013

• #9

All sorted. He came round to run it up my road (which is private and not a public highway) and it went out after about 50 yards, in fact he hadn't even got off the drive!

 

Mark L

Well-Known Member

• Apr 28, 2013

• #10

GDM said:

All sorted. He came round to run it up my road (which is private and not a public highway) and it went out after about 50 yards, in fact he hadn't even got off the drive!

Click to expand...

That's how it should work. Designed to come on upon starting the engine and extinguish once you get to 5mph.

 

G

GDM

Active Member

• Apr 29, 2013

• #11

It came on again on the way to the MOT station. Apparently it was flashing in time with the indicators, so I suspect a bad earth to the ABS ECU. Does anyone know where the earth point for the ABS ECU is?

 

nrgserv

Well-Known Member

• Apr 30, 2013

• #12

screen shots from rave showing ecu schematic and earth numbers.
location shots of earth points.
please note tho, this is a nas (north american spec) of rave, i cant find my english version!
hope this helps.

 

G

GDM

Active Member

• Apr 30, 2013

• #13

Thanks for the pictures.

We did find that the earthing points on the first connector on the battery cable were all loose, and we thought that this might be the problem but although the light stayed out initially this time, it then came on after about 100 yards.

I wonder if the earthing points are the same on the North American spec cars as the RHD ones?

I will take a look but failing any problems here (and perhaps one last diagnostic check), I think it is going to have to go to a specialist to be sorted.

 

G

GDM

Active Member

• May 1, 2013

• #14

Where can I find the ABS warning light relay?

 

nrgserv

Well-Known Member

• May 2, 2013

• #15

GDM said:

Where can I find the ABS warning light relay?

Click to expand...

there isnt a specific relay just for the abs light.

the light receives a permenant supply from f14 in the facia fusebox and is grounded by k103 (abs warning relay) via k101 (abs load relay) from the abs ecu, or the abs ecu its self.

 

nrgserv

Well-Known Member

• May 2, 2013

• #16

 

G

GDM

Active Member

• May 2, 2013

• #17

Thanks. So it must K103 that I remove to do the blink codes? I think I have read that this is one of the green relays in the tray below the ABS ECU.

 

G

GDM

Active Member

• May 2, 2013

• #18

Have found the relay and done the blink test, it gave 2-14 which is front LH wheel sensor air gap. This was the wheel that failed the MOT on the bearing, which has now been done, so I guess this being worn could have knocked the sensor out. How exactly do I knock it back into position?

 

nrgserv

Well-Known Member

• May 2, 2013

• #19

gentle clout with a hammer.
seriously! but dont clout the cable!

it wont move much unless its really far out btw.

 

G

GDM

Active Member

• May 2, 2013

• #20

Latest so far on this: -

Tapped the front LH sensor in and cleared the code.

ABS light came on again. Got excessive air gap blink code for rear RH wheel sensor. Tapped both rear sensors in, to be sure, and cleared the code.

ABS light came on again. Got excessive air gap code for the front LH sensor again. Checked the new wheel bearing and found that it had bedded in and had some play, so adjusted it up and made sure the sensor was pushed in, and cleared the code.

ABS light came on again. Got high resistance/open circuit for front LH sensor. Cleared the code.

ABS light came on again. Got same code reading again, so looks like it needs the front LH sensor replacing.

If it was my car I would change it myself but I think I am going to suggest that my mate takes it a Landy specialist to have it repaired and MOT'd at the same time.