ABS Light sequence test Fail?????...

KieranEG6

KieranEG6

Member
Just back from test last week failed on mostly minor things that I intended it to fail on like no Fog or horn. But they also failed it on "ABS light incorrect sequence".?

Now as far as I can see it all works fine. Ign on the light comes on, start the car the light goes out. Drive down the road and stamp on the brakes the ABS kicks in ......

Is there something Im missing? Any sort of ABS diag check or reset.

Also anyone had any trouble with Main beam blue dash warning light. Mine refuses to work. Wiring all sound, connections sound, bulbs including in the cluster all sound but no live to dash bulb when I use main beam. Thinking of just running a link wire up to the back of the clocks from the stalk.

Any help would be appreciated.
 
fubar andy

fubar andy

Moderator & N/W Rep
Staff member
KieranEG6 said:
Just back from test last week failed on mostly minor things that I intended it to fail on like no Fog or horn. But they also failed it on "ABS light incorrect sequence".?

Now as far as I can see it all works fine. Ign on the light comes on, start the car the light goes out. Drive down the road and stamp on the brakes the ABS kicks in ......
Click to expand...
That's right, mine does the same, light comes on with ign.

Fire the engine, ABS light goes out.

I can't see any other sequence, you should check with them what they think the sequence is?

Make sure they are not trying to take the piss!

 
KieranEG6

KieranEG6

Member
Thats the plan tomorrow. Just going to ring up and ask what the hell they are on about. Im sure there is some confusion in there somewhere.
 
G

geoff pine

Well-Known Member
When you turn the key the abs ecu goes in to self test sequence once it's sure the abs is functioning as it should the light goes out that's it .
 
PobodY

PobodY

Moderators
Staff member
I watched them do my brakes last week and I didn't see them paying any attention to the ABS. - As above; the light goes on then off... and stays off despite the real possibility I buggered a wheel sensor changing the wheel bearing.
 
KieranEG6

KieranEG6

Member
Rang them today and they are saying the light should come on with the ign then go out after a few seconds. Not just when you start the engine.

I seems they think that the ABS has been rigged to just put the light out once engine is running.

Does anyone's go out with just the ign on or do you have to start the engine.
 
KieranEG6

KieranEG6

Member
Nope mine only goes out once engine is running. Starting to think he is right and it might have been rigged. Is weird how the ABS works though.

Cant seem to find any signs of harness tampering though.
 
PobodY

PobodY

Moderators
Staff member
I think mine stays on until you start the car too. - It doesn't help that it also only comes on once the immobiliser is deactivated... in which case I'm probably about to start the car.

Give me ~30 minutes and I'll double check what mine does; either way it has never failed an MOT for that.
 
PobodY

PobodY

Moderators
Staff member
PobodY said:
I think mine stays on until you start the car too. - It doesn't help that it also only comes on once the immobiliser is deactivated... in which case I'm probably about to start the car.

Give me ~30 minutes and I'll double check what mine does; either way it has never failed an MOT for that.
Click to expand...
I waited 1 minute with the ignition on and the <Antilock> light didn't go out.

Started the engine and within a couple of seconds the light did go out.
 
KieranEG6

KieranEG6

Member
Thing is there is no Mot on the isle of man. A car only needs testing if it has been imported from off island or has been out of tax over 2 years. So because there is only some off test that can only be carried out by the only gov test centre they tend to be fairly harsh especially on performance orientated cars. The general community of the island are mostly either rich snob, elderly or motorbike enthusiasts. Car enthusiast being the minority as such. Being such a small island unless your within the correct social clicks your end up not have an as easy life as most. Suppose I'm just glad there is only 1 test to pass.

This abs shiz is racking my brain. As it seems to work fine yet I see what he means as in theory the light should go out on ign as it's electrically primed and shouldnt be effected by the engine running as such.
 
KieranEG6

KieranEG6

Member
Now I am royalty confused. Some go off on ign and some don't go off till engine running. !?

Thing is he wants written proof that it's how the system works or he is just going to class it as incorrect and rigged.

Hopefully if I can just show and prove the ABS works and kicks in then it should be fine. Although its proving quite difficult to get it to lock as it's so dry and I have new pads +discs all round that are not bed in yet a d I can really drive it on the road.
 
PobodY

PobodY

Moderators
Staff member
Ah... could it be the difference between <Antilock> and <ABS>?

Lets see if we can find a page in the manual that describes "normal" operation...

This should be the "error codes". - It also says that if the system seems to be otherwise OK, it's possible the fault is low voltage (i.e. alternator or battery on the way out)...
 
KieranEG6

KieranEG6

Member
PobodY said:
Ah... could it be the difference between <Antilock> and <ABS>?

Lets see if we can find a page in the manual that describes "normal" operation...

This should be the "error codes". - It also says that if the system seems to be otherwise OK, it's possible the fault is low voltage (i.e. alternator or battery on the way out)...
Click to expand...
Fast Guy said:
Has it been wired to the oil pressure sender?
Click to expand...
Battery is bran new and alternator seems to be working quite well. As I tested both when replacing the battery not long ago.

I see what you mean. Someone could have wired the light into the oil pressure sender or pressure switch along with the oil light on the dash but then if it was rigged to pass MOT in the past then surely the ABS wouldn't actually work. Where as mine works fine. Had it up on the 2 post ramp today to double check instead of the old emergency stop method, ran it up in gear and every time you touch the brakes the ABS goes nuts as it picks up wheel speed difference an lock ups.

Not sure if the im understanding the wiring diagram correctly but it shows the ABS warning light to run on the same circuitry as a feed from the alternator. Could be seen as a link to show the lamp is connected to engine speed activation in a way.

http://www.gtirworkshopmanual.com/default.aspx?v=1846
 
Last edited:
You must log in or register to reply here.
Top