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SugarHillCTD
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Joined: 10 Oct 2007
Posts: 4238
Location: Now in Eastern Pennsylvania
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 Posted: Sat Apr 26, 2008 5:11 pm Post subject: ABS removal part II? (kind of long...) |
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Question for those knowledgeable about BMW ABS.
Before I yank it out, I had a thought. Somewhere I thought I read that when the system encounters a braking situation where the two wheels rotate at different speeds or one completely locks up on a loose surface, the system may go into "fault", and the diagnostic equipment at a BMW dealer is the only way to clear it. Is this true?
Here's why I ask. The current problems I am having with my ABS occurred between last Sunday's rides. The ABS worked fine in the morning. I came home, ate lunch and when I went back out with Cathy for a P.M. trip to the grocery the ABS showed fault.
The different wheel speeds definitely occurred when I came home from the morning ride. We live on a dirt road and the last section is a short steep curve down to the garage. I use rear brake only on that section so the front doesn't wash out and even though I did go slowly, the rear wheel probably locked up on the very loose surface.
Possible cause?
The pin #2 to ground clear has not worked (did it several times), neither did the rolling reset.
Any final thoughts on this before the ABS-ectomy?
Thanks,
John
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John & Cathy
'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F. |
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bmwmick
Flying Brick Rider
Joined: 07 Jun 2003
Posts: 907
Location: Tucson, AZ
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| Posted: Sat Apr 26, 2008 6:24 pm Post subject: Re: ABS removal part II? (kind of long...) |
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| SugarHillCTD wrote: | Question for those knowledgeable about BMW ABS.
Before I yank it out, I had a thought. Somewhere I thought I read that when the system encounters a braking situation where the two wheels rotate at different speeds or one completely locks up on a loose surface, the system may go into "fault", and the diagnostic equipment at a BMW dealer is the only way to clear it. Is this true? |
Not exactly.
Once the system is initialized, if you put it on the center stand and let the rear wheel spin, it can cause the fault you mentioned.
If you were trying to stop and one wheel approached lockup, the ABS would release the pressure on that one wheel until it was spinning again. That action does not cause a fault.
Did you read the fault codes? What error do you get? ABS-I or ABS-II?
Mick
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Mick McKinnon
KOG#175
'93 K1100LT, '96 R1100RT, '84 R100RS, 2010 Kawasaki C-14
Tucson, AZ |
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SugarHillCTD
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Joined: 10 Oct 2007
Posts: 4238
Location: Now in Eastern Pennsylvania
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| Posted: Sat Apr 26, 2008 7:36 pm Post subject: |
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Mick,
Thanks for the response. I have ABS-1 (have an ABS can visible on each side of the bike)
Never felt any kind of ABS activity when I was on that loose material.
When I did the Pin 2 diagnostic, came up with 6 flashes, which should be the ABS relay. But could it fail in the hour or so between rides?
This ABS stuff feels a bit like black magic or ??
Thanks again,
John
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John & Cathy
'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F. |
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bmwmick
Flying Brick Rider
Joined: 07 Jun 2003
Posts: 907
Location: Tucson, AZ
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| Posted: Sat Apr 26, 2008 11:03 pm Post subject: |
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| SugarHillCTD wrote: | Mick,
When I did the Pin 2 diagnostic, came up with 6 flashes, which should be the ABS relay. But could it fail in the hour or so between rides?
Thanks again,
John |
Yes,
That relay can fail permanently or intermittently at ANY time. You 'could' try just replacing that relay. There is a Hella equivalent relay HL66126, about $14 BMW thinks they are worth big bucks, P/N 61311459676
http://www.rallylights.com/hella/Relay_Mini_SPST_12v.asp#66126
The above is the Hella link.
_________________
Mick McKinnon
KOG#175
'93 K1100LT, '96 R1100RT, '84 R100RS, 2010 Kawasaki C-14
Tucson, AZ
Last edited by bmwmick on Mon Apr 28, 2008 8:52 pm; edited 1 time in total |
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SugarHillCTD
Site Admin
Joined: 10 Oct 2007
Posts: 4238
Location: Now in Eastern Pennsylvania
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| Posted: Mon Apr 28, 2008 8:53 am Post subject: |
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Mick,
Thanks for the info & the relay cross reference. Will give it a try and let the forum know how it turns out.
John
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John & Cathy
'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F. |
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old guy old bike
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Joined: 18 Jul 2007
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Location: Lisbon, OH
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| Posted: Mon Apr 28, 2008 7:10 pm Post subject: |
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One source on that relay is Susquehanna MotorSports in Fleetwood Pa. phone 610-944-3233 or www.rallylights.com
The item code is HL66126
Jeff
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bmwmick
Flying Brick Rider
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Location: Tucson, AZ
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| Posted: Mon Apr 28, 2008 8:48 pm Post subject: |
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Thanks for chiming in Jeff! 
Mick
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Mick McKinnon
KOG#175
'93 K1100LT, '96 R1100RT, '84 R100RS, 2010 Kawasaki C-14
Tucson, AZ |
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Flying Duck
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Joined: 27 Jan 2005
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| Posted: Mon Apr 28, 2008 9:07 pm Post subject: |
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| bmwmick wrote: | | SugarHillCTD wrote: | Mick,
When I did the Pin 2 diagnostic, came up with 6 flashes, which should be the ABS relay. But could it fail in the hour or so between rides?
Thanks again,
John |
Yes,
That relay can fail permanently or intermittently at ANY time. You 'could' try just replacing that relay. There is a Hella equivalent relay HL66126, about $14 BMW thinks they are worth big bucks, P/N 61311459676
http://www.rallylights.com/hella/Relay_Mini_SPST_12v.asp#66126
The above is the Hella link. |
Mick:
Have you ever seen a 676 realy come out of an ABS I bike? I've pulled apart several ABS I bikes and they've all had the 677 relay. (At least thaqt's what'so ne the little blue relay case.)
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bmwmick
Flying Brick Rider
Joined: 07 Jun 2003
Posts: 907
Location: Tucson, AZ
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| Posted: Mon Apr 28, 2008 10:41 pm Post subject: |
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| Flying Duck wrote: | | bmwmick wrote: | | SugarHillCTD wrote: | Mick,
When I did the Pin 2 diagnostic, came up with 6 flashes, which should be the ABS relay. But could it fail in the hour or so between rides?
Thanks again,
John |
Yes,
That relay can fail permanently or intermittently at ANY time. You 'could' try just replacing that relay. There is a Hella equivalent relay HL66126, about $14 BMW thinks they are worth big bucks, P/N 61311459676
http://www.rallylights.com/hella/Relay_Mini_SPST_12v.asp#66126
The above is the Hella link. |
Mick:
Have you ever seen a 676 realy come out of an ABS I bike? I've pulled apart several ABS I bikes and they've all had the 677 relay. (At least thaqt's what'so ne the little blue relay case.)
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Yes,
My bike (08/1992) has the 61 31 1 459 676 ABS-I power relay. So does Jeff's and his is just a little older than mine. Is that '677' relay a half-size or mini relay? Sounds like the fuel pump, fan horn relay and not the power relay. P/N 61311459675 is the ABS warning relay.
Mick
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Mick McKinnon
KOG#175
'93 K1100LT, '96 R1100RT, '84 R100RS, 2010 Kawasaki C-14
Tucson, AZ |
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