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Brake Test fail

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Alexm1:
Hello, New user and first post so it could well be something I am doing. I have a 2003 K1200 GT.
Plugged the GS 911 in for the first time today, Engine section showed all was well, no stored errors.
ABS section showed some old stored errors but no faults present, cleared and all was well. Took the bike for a run and no errors appeared.
The problem: I performed a brake test on both the front and the rear brakes, red line appears and begins to move to the right across the screen, I can squeeze the lever or push  the pedal as hard as I like, it will not turn green.  After I cancel the rear brake test I get a message indicating no signal from the controller, no such message when I cancel the front test.
The brakes work perfectly, no dash lights, no fading that I have noticed.
I will have to bleed the wheel and control circuits to prove to my self that all is well but has anyone experienced this issue?
Appreciate any advice.
Alex.

UPDATE:
I think I like this GS 911!
I recorded a CSV log file whilst I was performing this test and have now had a chance to digest the results.
with the front brake off the control pressure is 19.7 and front wheel pressure is 18.7.
with the front brake on the control pressure is 31.6 and front wheel pressure is 56.99.

with the rear brake off the control pressure is 19.57 and rear wheel pressure is 17.32.
with the rear brake on the control pressure is 44.57 and rear wheel pressure is 44.51.

Through all of this the battery voltage varies between 10.04 and 10.86.

My guess is I have a faulty battery.
I keep the bike on a maintenance charger so would not notice a weak battery initially.

Can anyone with a little more experience with the GS 911 confirm my thinking? (or give me other readings to check)
Thanks

Alex.

kobus:
Alex, the Battery voltage can influence the pressure reading (and cause a lot of other problems). 10.x V is definitely too low (if it falls this low after being on a maintenance charger, I would also suspect the battery).

bikecrazy5:
agreed with Kobus the bikes with all the electronics bits and bobs do not like low voltages...one of the first things the ecu switches off when riding with a flat battery is the abs ,thus meaning you would only be riding with normal hydraulic brake pressure...

Alexm1:
Thank you both for the feedback, good to get confirmation.
I did some more tests this morning and I appear to have a voltage drop between the battery and the ABS test point.
Voltage at battery 13.11 , ignition off.
Voltage as indicated by GS 911 viewing engine outputs 13.66 to 13.90. (Engine running)
Voltage as indicated by GS 911 viewing ABS outputs 10.8 to 10.9.(engine running)
I am assuming at this point that the ABS module connector has corroded terminals. I have yet to take it apart to see.
Anyone know where the battery voltage is sampled for the engine and for the ABS unit?
Note through all of this I have no error indicators, I would not be looking at this except the brake test failed on the GS 911. Great preventative maintenance.

kobus:
Alex, there are a few voltages measured here.

1) The voltage on the battery terminal as sampled by the GS-911 ADC itself
2) The voltage as sampled by the engine controller ADC (somewhere on the ECU pc board) and reported to GS-911.
3) The voltage as sampled by the ABS controller ADC (somewhere on the ABS pc board) and reported to GS-911.

It's normal for these voltages to differ a bit (I would say up to 500mV would be OK) as there are scaling factors, calibrations and voltage drops involved.

If you have a decent volt meter with needle probe, measuring on the connector to the ABS would also be useful for analysis.

Please send an AutoScan of your bike so we know exactly what we are talking about here.

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