Emergency Brake Assist Failure

Emergency Brake Assist Failure

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Discussion

davek_964

Original Poster:

4,953 posts

109 months

Friday 3rd July 2015
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Took it to a specialist today, and the fault it's logged is pedal travel sensor.

They asked when the brakes were last bled because they said that sometimes this fault is actually due to air in the system - the pedal travel doesn't match the braking force so the sensor fault gets logged. They said that if that's the case, it tends to happen more under heavy braking.

So, initially we decided I should get the brakes bled and see if that cures it before getting the sensor replaced. But having thought about it, heavy braking is probably the one situation it hadn't happened and sometimes it's immediately after system check before starting the car or touching the brakes. Since the sensor is pretty cheap anyway it's booked in next Friday to have the sensor replaced and the brakes bled.

I would expect to be able to do both myself, however I still have to decide whether I continue AM service history or use an independent next year when my first service will be due. I've been impressed by this independent the few times I've spoken to them and when I visited them briefly about whether my windows were dropping correctly when the doors were opened.

So I think this will be a relatively simple and not too expensive trial run of their work (Spellbound in Farnham).

davek_964

Original Poster:

4,953 posts

109 months

Tuesday 7th July 2015
quotequote all
Light came on again this morning - apart from the times it's done it from startup, it's actually the first time I've noticed exactly when it appeared.
I'd previously used the brakes, but only gently - from a speed of about 10mph. Crossed a junction and a few seconds later the light came on - so maybe 5-10s after I'd last used the brakes.

Hopefully, it will get fixed on Friday afternoon with the new pedal travel sensor and brake bleed!

BewickPlace

7 posts

38 months

Saturday 15th August 2015
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I know this is an old thread, but I hoping a few people continue to read it.

I have the "Emergency Brake Assist Failure" message on my '08 Vantage. The problem appears to be intermittent, it can come on within 50m of the house or not at all (just done 130 mile trip to the south coast).

I was suspecting the pressure sensor in the master cylinder but can't see why that would be intermittent. Current thought is that the brakes just need to be bled. Testing this theory I pump the brake pedal before any journey and to date the light hasn't come back on??!!??

I was also wondering if anyone knew what the management codes were affecting this? I read mine using the "torque" app on android and a basic bluetooth ODB adapter. This reports error P1259, this is listed as manufacturer specific, but I can't find any Aston specific definitions.

All help and advice warmly welcomed.

davek_964

Original Poster:

4,953 posts

109 months

Monday 17th August 2015
quotequote all
I don't know what the codes mean I'm afraid - however, I would say that when I tried reading codes from mine with Torque, it didn't display any codes so you've managed more than me.

My failure hasn't come back since having the pedal travel sensor replaced.

BewickPlace

7 posts

38 months

Tuesday 18th August 2015
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Were you using the paid version of the app? I had to upgrade in order to access the ABS codes - now I can see the code I don't know what it means :-)
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davek_964

Original Poster:

4,953 posts

109 months

Tuesday 18th August 2015
quotequote all
BewickPlace said:
Were you using the paid version of the app? I had to upgrade in order to access the ABS codes - now I can see the code I don't know what it means :-)
Ah, good to know. I was using the free version.

matrignano

1,752 posts

144 months

Tuesday 29th March 2016
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Bit of a bump.

Have had the ABS/brake failure lights a few times in the past few years but "rebooting" the car always seemed to fix it.

Last night I had the ABS, TC, DSC service etc lights come on. Traction Control is definitely off which is interesting!! All lights were still on this morning which leads me to believe this is a bit more permanent than what I've had before.

What's the general consensus from people who have had these faults before - is the culprit still most likely the ABS pressure sensor?

DAVIDOXE

324 posts

48 months

Tuesday 29th March 2016
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I have read that multiple alarms could be an indication of the battery starting to fail.

matrignano

1,752 posts

144 months

Tuesday 29th March 2016
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DAVIDOXE said:
I have read that multiple alarms could be an indication of the battery starting to fail.
Thanks. Will try that.
It might also explain why the driver's side seat heating and lumbar support no longer work?

matrignano

1,752 posts

144 months

Wednesday 20th April 2016
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Just got a new health check email report from my dealer. Quite like the new RAG checklist.
Unfortunately my dealer seems to be up to its old tricks for what really matters, i.e. work needed & quoted prices!

My ABS/DSC Christmas lights have been diagnosed as "O/s/f abs sensor wiring is broken. Repair kit required".
Now a repair kit from Aston Martin Bits is £61.88 incl. VAT.
The Dealer has quoted me £655.51, and I'm not even sure if that with our without VAT!

Does it really take 5-6 hours of labour to fix this, or are they pulling my leg?

With these feet

5,423 posts

149 months

Wednesday 20th April 2016
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Its a fairly simple fix, Ive soldered a few both front and rear, unsurprisingly they break near where the wishbone attaches to the chassis. Unless they are chasing the loom back it seems rather a large amount. Ive even done one in the middle of a 24hr race!

Manwhoneverwas

529 posts

65 months

Wednesday 20th April 2016
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matrignano said:
Just got a new health check email report from my dealer. Quite like the new RAG checklist.
Unfortunately my dealer seems to be up to its old tricks for what really matters, i.e. work needed & quoted prices!

My ABS/DSC Christmas lights have been diagnosed as "O/s/f abs sensor wiring is broken. Repair kit required".
Now a repair kit from Aston Martin Bits is £61.88 incl. VAT.
The Dealer has quoted me £655.51, and I'm not even sure if that with our without VAT!

Does it really take 5-6 hours of labour to fix this, or are they pulling my leg?
They are way too expensive.
I had this exact same problem fixed at AM Edinburgh and it was circa £285.
They took two attempts to fix it since it was first diagnosed with a broken wire on the harness (which was repaired for £160) and this sorted the problem for a few days then it was discovered the 2 wire harness to the sensor had water in it and they replaced the wiring on the second visit (£125)



Ken Figenus

3,941 posts

51 months

Wednesday 20th April 2016
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Suggest they move the decimal point one to the left for a wiring fix and then consider dumping them!

matrignano

1,752 posts

144 months

Wednesday 20th April 2016
quotequote all
Dealer sent me a video as well. The wiring is split near the wheel hub, so should really be an easy fix!
Will call them tomorrow and tell them to stop messing me around.

Same as with services, they always quote me silly prices into I send them a link to AM Works or HR Owen's pricing schedules, and then they magically are able to match their prices, "just for you Sir".

Think the Dealer Principal will be hearing from me, I'm fed up with them trying to pull a fast one all the time!

matrignano

1,752 posts

144 months

Thursday 21st April 2016
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Dealer is definitely taking the piss!

My question to dealer:
A wiring repair kit can be bought for £61.88 incl. VAT (http://astonmartinbits.com/models/5-V8-Vantage/parts/2080). Judging from the video, you just need to solder a few wires which shouln't take long. Can you please explain how you come to your quote of £655.51?

Dealer's response: It takes 2.50 hours to complete the work £199.75+vat an hour

Ken Figenus

3,941 posts

51 months

Thursday 21st April 2016
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matrignano said:
£199.75+vat an hour
eekeekeek? Reputable indies charge less than half that.

PrAston

5 posts

14 months

Thursday 21st December 2017
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I'm getting a triumvirate of error messages on my 05 DB9: Emergency Brake Assist Failure, DSC Service Required, and Traction Control Temporarily Off. It seems to be a genuine failure, i.e., shutting off and restarting doesn't clear it. It appeared after the car had been sitting for about two weeks, and I had never had the warning come up before.

From what I've read it sounds like the Brake Pressure Transducer is the most likely culprit. I know it can be other things, but my code reader won't talk to the ABS module, so I don't have any way of narrowing it down. Should I replace it on a hunch? If it's faulty and I replace it, will the message go away on its own or does it have to be cleared manually? It doesn't look like bleeding the brakes is required, but if it is, can that even be done the conventional way? I ask because the manual talks of hooking up to AMDS which manipulates the ABS pump to bleed the brakes.

Any other tests that can be done or general suggestions? Trying to avoid a 250-mile trip to the dealer.

morty1961

172 posts

116 months

Thursday 21st December 2017
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I have the DSC Service Required and Traction control temporarily disabled message as well..... Bridge Mill read the codes at the last service and its showing Yaw Sensor failure ... bit of a nasty fiddly job to do apparently :-(

Ken Figenus

3,941 posts

51 months

Thursday 28th December 2017
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PrAston said:
I'm getting a triumvirate of error messages on my 05 DB9: Emergency Brake Assist Failure, DSC Service Required, and Traction Control Temporarily Off. It seems to be a genuine failure, i.e., shutting off and restarting doesn't clear it. It appeared after the car had been sitting for about two weeks, and I had never had the warning come up before..
I had all those last week (and then some) as hadn't connected the trickle charger properly... Seriously - fully charge the battery and take it for a good blast with a few key out stops before getting the wallet out! Am expecting a Foxwell NT510 which reads proper Aston codes for body and engine modules meantime.

Rappa

474 posts

204 months

Thursday 28th December 2017
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Ken Figenus said:
I had all those last week (and then some) as hadn't connected the trickle charger properly... Seriously - fully charge the battery and take it for a good blast with a few key out stops before getting the wallet out! Am expecting a Foxwell NT510 which reads proper Aston codes for body and engine modules meantime.
Ken,

Out of interest. Which software enables the Foxwell to read 2005 AM codes?
Ford or Volvo?

Sean