throttle position sensor update

[johnl]

My previous post on why my bike might be running like crap had lead me to believe it may be the throttle position sensor. ( I had previously changed air filter, fuel filter, plugs, plug lead, coil, checked valve clearence, balabced throttle bodies, washed out out tank ).

I swapped the throttle body complete with TPS from my good R1100s but no change.

The bike went into BMW today to try and diagnose the fault with the use of their computer. The computer says

' Throttle Valve potentiometer fault on upper or lower trail path '

This suggestd it is a fault with the TPS however as stated I have changed this before.

So, might it be the wiring to the TPS from the ECU? Does the wiring to the ECU just clip on / off as it does at the TPS end? is the wiring easily interchangable?

I shall have a more detailed inspection at the weekend.

Also, anyone any further thoughts or experiance of the TPS?

thanks
john

[r550s]

yes, the ecu connector is straightforward to remove - release the shiny metal clip at the loom end of the connector and the other end hooks in. Wouldn't fancy swapping the loom - maybe identify the wires between TPS and ECU (from the haynes wiring diagram) and check resistance of each one - that'd be much quicker.