Author Topic: ABS Fault following brake fluid change  (Read 1045 times)

Deckard

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ABS Fault following brake fluid change
« on: September 20, 2018, 12:46:41 AM »
Hi Everyone, 

Recently purchased a GS-911 to help me with the renovation of 2 x R1200CL's, however my R1200C Indi (8.5k) miles has developed a fault since changing the brake fluid.  The ABS light is flashing (at a different speed to the normal start-up) and continues.  I can hear the ABS unit working when applying the front brake and the front brake works normally, no ABS activation when applying the rear brake and no hydraulic braking available at the back wheel.  The GS 911 diag shows high pressure in the rear circuit, however I don't understand what is causing the high pressure.  Have also fitted a new battery. 
My bike has undergone a major restoration (new front frame).   Any ideas or feedback would be much appreciated,
 
Motor Rear                                         Off
Brake Light Switch Front                         NOT ACTUATED
Brake Light Switch Rear                         NOT ACTUATED
Brake Fluid Level                                 OK
Front Wheel Speed                                 0.0 Km/h
Rear Wheel Speed                                 0.0 Km/h
Battery Voltage                                         11.9
Pressure in Front Wheel Circuit                 20.80 Bar
Pressure in Rear Wheel Circuit                 95.19 Bar
Pressure in the Front Wheel Control Circuit 18.55 Bar
Pressure in the Rear Wheel Control Circuit  18.11Bar

Thanks in advance

Dave
« Last Edit: September 20, 2018, 12:49:11 AM by Deckard »

schuppi

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Re: ABS Fault following brake fluid change
« Reply #1 on: September 24, 2018, 12:21:23 PM »
Hello Dave

Pressure in Rear Wheel Circuit >> 95.19 Bar
That's a faulty pressure sensor inside the ABS-ECU. No way to repair without dismantling the unit
and replace the sensor.
But there is no chance to get a new one from a dealer.
Sorry
Schönen Tag
Wolfgang
                                       talk less, drive more

Deckard

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Re: ABS Fault following brake fluid change
« Reply #2 on: September 24, 2018, 02:39:28 PM »
Thanks for the reply Schuppi,  it sounds like I have 2 choices.  1). send the unit to ModuleMaster or 2). Try to obtain a used sensor and replace myself.   Thanks  Dave

Deckard

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Re: ABS Fault following brake fluid change
« Reply #3 on: September 25, 2018, 05:35:18 PM »
Hello Wolfgang,
Maybe you have some input?   Have checked a new ABS would cost approximately €1600, with discounts.   A second hand or used units typically starts at €2-300 upto €1000.   My opinion is that a faulty sensor does not warranty a replacement unit and a used unit will have more Km's than my unit (my 1200C only has 12K Km).   There appear to be the following repair options.      1). Module Master in the US charging $750 and the shipping cost, although there don't appear to have started this service as of today.    2).  RH Electronics in Germany, providing a refurbish service at similar money or a repair service where cost is based on the parts and labour required.  At this moment RH looks like the best.  In your experience have you had any experience to the options I mention or possibly any other options?  Thanks Dave

schuppi

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Re: ABS Fault following brake fluid change
« Reply #4 on: September 25, 2018, 07:05:58 PM »
Hello Dave

1. for a used unit I only would pay 100,-€
2. I had the best experience with RH-Electronics.
    For three of my friends installation and function without any problems.
    The oldest device has been running for 4 years now.
Schönen Tag
Wolfgang
                                       talk less, drive more

Deckard

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Re: ABS Fault following brake fluid change
« Reply #5 on: September 25, 2018, 07:17:48 PM »
Thanks Wolfgang,   I was leaning toward RH, your opinion is good.   I have potentially another BMW a R1200CL also with an ABS fault, just haven't got around to investigating or running diagnostics on this bike yet.

Thanks a million.  Dave