Author Topic: Bike won't start - No fault codes!  (Read 1368 times)

Sayeed

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Bike won't start - No fault codes!
« on: May 14, 2024, 05:57:55 PM »
I am new to GS-911 world, just received the Wifi unit today and trying to figure out what's wrong with my F750GS.

Engine controller was having this fault which I cleared now before trying to restart
Fault code: 0x3A13E1
Description: Clutch switch 2 open, signal implausible
Currently present: No

Bike does crank but no combustion!

Ironically there are NO fault codes on neither engine controller nor on immobiliser/Keyless ride.  Tried to do some live values on the following modules thinking some very obvious thing is missing...

Immobiliser/keyless controller:
Ignition current : 9.0 mA
Fuel cap lock current : 0.0 mA
Fuel filler cap lock : Actuated
Button one : Not Actuated
Button two : Not Actuated
Remote battery status : OK
Terminal 15 Status : ON
Steering lock status : 4
Steering lock servo current : 0.0 mA
Ignition voltage : 12.50 V
Battery voltage : 12.50 V


Anti-theft controller:

Battery voltage : 12.70 V
Controller battery : 6.90 V
Controller battery status : OK
Reason for last alarm : Y-axis tilt
Tilt sensor status : Not calibrated
X-axis tilt : 19.7 °
X-axis tilt (relative) : -12.7 °
Y-axis tilt : 0.3 °
Y-axis tilt (relative) : -0.3 °
Z-axis tilt : 63.1 °
Z-axis tilt (relative) : -12.7 °

Any idea what could be issue.  Will also share the engine live values...

Sayeed

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Re: Bike won't start - No fault codes!
« Reply #1 on: May 14, 2024, 07:53:27 PM »
Live values from Engine controller
Battery voltage : 12.70 V
Air temperature : 18.0 °C
Engine temperature : 17.3 °C
Calculated Wheel Speed : 0.0 mph
Ambient air pressure : 983 mBar
Fuel pressure : 1000 mBar
Engine RPM : 0 rpm
Camshaft RPM : 0 rpm
Lambda sensor voltage 1 : 3356.0 mV
Clutch Switch 2 : Actuated
Start switch : Not Actuated
Kill switch : RUN
Fuel pump : OFF
Immobiliser starter release : OFF
Starter enable release : ON
Starter protection : OFF
Ignition angle : 162.0 °KW
Ignition coil closing time : 2.3 ms
Injection time bank 1 : 0.0 ms
Throttle twist-grip position : 1.37 %
Throttle valve position : 25.99 %

Note sure of what clutch switch 2 'Actuated' does?
« Last Edit: May 14, 2024, 07:56:10 PM by Sayeed »

John-G

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Re: Bike won't start - No fault codes!
« Reply #2 on: May 14, 2024, 08:10:40 PM »

Hi Sayeed,

Welcome to the Forum,

It might be worth checking the Clutch Lever and Prop Stand Switches. Also try starting with Clutch Lever pulled in.

Sayeed

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Re: Bike won't start - No fault codes!
« Reply #3 on: May 15, 2024, 11:56:16 PM »
Thanks John.  Tried that too.  Some of the fault codes on Telematic unit were reappearing, checked all connectors and cleaned on Hexcode advice. 

Learnt that clutch has 2 switches and both sits on left hand lever and this is how they operate. 

Clutch left hand Lever  Not pulled            Slightly pulled     Fully pulled
Switch 2                      Actuated              Not actuated      Not actuated
Switch 1                      Not actuated        Not actuated      Actuated

In short Switch 2 is normally actuated.



John-G

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Re: Bike won't start - No fault codes!
« Reply #4 on: May 16, 2024, 11:06:59 AM »

Hi Sayeed,

Thanks for the info re Clutch switches, I don't suppose you have now found what their functions are? I'm trying to see exactly how Hill Start Control works on my 1250GS and wondered if one of these switches might be involved in that.

Sayeed

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Re: Bike won't start - No fault codes!
« Reply #5 on: May 16, 2024, 01:06:32 PM »
No idea John would let you know if I come across.

Can anyone post live values for their F750 or F850 for me to compare please.  Would be of great help, Thanks a lot!

Borgia

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Re: Bike won't start - No fault codes!
« Reply #6 on: May 16, 2024, 10:49:35 PM »
No idea John would let you know if I come across.

Can anyone post live values for their F750 or F850 for me to compare please.  Would be of great help, Thanks a lot!

Clutch switch 1 prevents the bike from starting in gear unless the clutch is disengaged.

Clutch switch 2 kills the cruise control if the clutch is pulled in even a small amount so as to prevent the engine from over-reving.
Hey BMW: No service manual = no new bike.

Sayeed

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Re: Bike won't start - No fault codes!
« Reply #7 on: May 17, 2024, 09:28:22 AM »
Thanks Borgia for the info, very useful.