Good point. I should provide info making no assumptions as to who may read this thread in future. Good point
Yea 15 to 20 mins is what it took me and I removed the cowling
but we shall see if he can do it with or without removal of cowling.... I prefer to remove for ease of access and I have a Givi top box on so it involved a bit more, but only a few minutes.
He should first check the wiring through, to remove that potential from the problem domain as any TPS issue may be masked or affected by poor connections/wiring. Its a simple check. Then move to the TPS after we have confirmed good wiring/connections from TPS to ICU.
Just a minor point , an ECU = Electronic Control Unit as far as my electronic engineering MSc went - also referred to as ECM (Electronic Control Module) which are typically multifunctional and manage various logic circuits associated with automotive applications - new vehicles ECU are quite advanced and include all sorts of applications from tyre pressure to advanced driving modes. However this subject Fazer unit is - as I observe the simple wiring diagram - only preoccupied with the service of the ignition system so technically is an ICU (Ignition control unit) although yamaha termed it a Ignitor. Very minor point not changing the diagnostic for arieljt
EDIT: I'm off to my usual Sunday lunchtime pint and scampi in a minute so please carry on with unfazed who is familiar with TPS problems and more learned with a Fazer than moi !.
Dont forget to check the TPS resistance arieljt:
1. disconnect TPS harness from TPS unit
2. Measure resistance across the TPS terminal where the BLUE and BLACK.BLUE wires connect. this is the TPS terminals not the harness. should be 3.5 to 6.5 +/- 0.5 Kohms
3. Measure resistance across YELLOW and BLACK/BLUE TPS Terminals whilst moving the throttle. again , TPS terminals not the harness. should be zero to 5 +/- 1.5 Kohms
if either of these readings are out , then replace the TPS. If ok and wiring ok then the ICU needs replacing