So after a week of crap weather here, its a bit warmer so I decide to go out. Leap on the 09 Tmax and ride off but it feels strange - return to base and find that the rear tyre has very little pressure in, and further examination reveals the end of a nail in the tread. Bugger! I think, I'll sort this out later, so leap on the 17 Tmax, and ride off, but notice that the engine warning light is on! Runs absolutely fine, but the light is a worry. Anyone know how to interrogate the system to find an error code? The owners handbook isn't helpful, it just says 'have a Yamaha dealer check the vehicle', which isn't easy on Boxing Day!

Not a good start, just remember bad luck comes in threes on a positive note, the Silverwing came out this morning with no dramas. Happy new year!

MrGrumpy wrote: Sat Dec 26, 2020 11:09 am So after a week of crap weather here, its a bit warmer so I decide to go out. Leap on the 09 Tmax and ride off but it feels strange - return to base and find that the rear tyre has very little pressure in, and further examination reveals the end of a nail in the tread. Bugger! I think, I'll sort this out later, so leap on the 17 Tmax, and ride off, but notice that the engine warning light is on! Runs absolutely fine, but the light is a worry. Anyone know how to interrogate the system to find an error code? The owners handbook isn't helpful, it just says 'have a Yamaha dealer check the vehicle', which isn't easy on Boxing Day!

Hi Grumpy, you'll need to put it in to dealer mode, but you likely know that. Dealers use a tool for this. The plug is usually under the seat in the wiring harness on most bikes but that may not be the case on the T-max. I've never had the privilege of working on one. Did you try turning it off and then on again? How long did the bike stand for prior to the ride. Sometimes the fuel additives settle at the bottom of the tank and if you don't shake the bike/fuel up before starting the engine it will suck some of the thick sticky goo from the tank into the engine which in turn will affect the injector pattern causing incorrect burn. This gets picked up on the lambda and the light comes on. It's not uncommon and normally will self correct with some new fuel and a shot or two of Redex fuel injector cleaner.

It hasn't been used that much due to filthy roads, but it did have a decent run a few days ago - it hasn't stood for more than a week or so. Yes, I tried turning it off and on, but no change!!
I believe the magic socket is buried under the front fairing near the battery, so even getting to it is a mechanic's job in itself!
Its running fine, but if I ride it, I'm worried that some actual fault will develop leaving me stranded at the roadside.

A reminder that 2020 hasn't finished with us yet.

Oh for a real bike having simple electrics plus even a kick start!

Jim

Hey Grumpy, I had this happen to me when I hadn't ridden my '17 for a while and it coughed, spluttered, and died on startup. Got it going with a little coaxing, but then the check engine light was stuck on. I left it for a while, expecting it might clear after a few power cycles like my Triumph, but no dice. In the end I purchased an OBD2 reader and adapter cable and located the diagnostic plug behind the battery panel on the fairing. I think there was some complaint about fuelling or something - I cleared the code and haven't had it come back since.

It's but the work of a moment, and I have all the kit now - whereabouts are you based?

Nick

EvilRacer329 wrote: Wed Jan 06, 2021 12:56 pm Hey Grumpy, I had this happen to me when I hadn't ridden my '17 for a while and it coughed, spluttered, and died on startup. Got it going with a little coaxing, but then the check engine light was stuck on. I left it for a while, expecting it might clear after a few power cycles like my Triumph, but no dice. In the end I purchased an OBD2 reader and adapter cable and located the diagnostic plug behind the battery panel on the fairing. I think there was some complaint about fuelling or something - I cleared the code and haven't had it come back since.

It's but the work of a moment, and I have all the kit now - whereabouts are you based?

Nick

I'm in the North East, but its OK - I went to my local workshop and they plugged in a code reader. The fault code was something about a 'Stall Warning' which sounds like your plane is about to crash! They did some sort of reset and cleared the fault and the warning light went out. There were no obvious symptoms of this fault - it was starting and running just as normal. Although it's been used less than normal - filthy roads and terrible amounts of black ice - it has had a couple of outings, and hasn't stood for more than 10 days or so without being used.

Ah, excellent. Yeah, mine was the same - no other symptoms. Whenever I read the codes out of my Triumph there's a handful of old ones from one-off starting or stalling issues, but at least the lights go out on their own if it's just a one-off. I'm afraid it's been weeks since I've ridden any of my bikes, so I go out to the garage once a week and rotate the trickle charger around. I've found that the T-Max's battery is pretty marginal at the best of times, and goes flat incredibly quickly. But even then, it does not like starting after it's been sat a while - really needs coaxing with a bit of throttle! Not something I'd expect from a modern fuel-injected engine...

Nick

Glad it's ok Grumpy!