Super Tenere, 2014, cruise control fixed?

sblissner

New Member
Joined
Oct 9, 2018
Messages
17
Location
Nashville TN
I have been watching this site and i"ve read a number of threads about cruise control issues.

In my case the cruise would work fine for a while, in fact one day it was fine for an entire 300 mile day. Generally however after a few miles the ON indicator will begin flashing indicating a fault. No codes were ever set and a dive into the diagnostic mode showed all switches working properly. Turning the bike off then restarting it would always fix the problem for a while. The only constant I could sort of find was that the fault would surface immediately after braking. I have read other threads siting resistance in the microswitches in the front brake lever mechanism.

In an act of desperation I removed and disassembled my front brake switch and made an interesting observation. Inside the assembly are 2 microswitches which are sequenced in their operation by their placement in the housing and the plunger design. When pulling the lever the Cruise Set power is interrupted first then the brake circuit power. Conversely the brake circuit is powered first, to kill the lights, then the Cruise Set circuit is repowered to allow the Set-Resume functions to work again.

It's important to note that the brake light circuit works bass ackwards. The brake light is powered through a normally closed relay, using the NC side of a SPDT micro relay. When the brakes are not being applied power goes through both the front and rear switches in series to energize the relay kill the brake light and sent voltage to the ECU. When power is interrupted by pulling the lever or pushing the pedal the relay closes to give brake lights and power to the ECU is interrupted.

In a similar manner power is sent through the Cruise Set circuit, ( front and rear brake switches, clutch switch and throttle off switch) to the ECU. These are also in series so interrupting any one breaks the circuit and cancels the signal to the ECU. The purpose of the staggered action of the brake and cruise switches in both the front and rear brake light switch assemblies seems to be to create a redundancy in the cancellation of the cruise.

My conclusion is that a sticky switch, that might test fine by itself, is enough to cause an out-of-sequence resumption of power to both circuits and that the ECU interprets that as a fault condition and puts the entire cruise system into fault mode.

I recently purchased a new front brake switch and installed same. Today was my second shake down ride since then and the cruise worked flawlessly. I left it powered up the entire time and the power light never started flashing, indicating a fault. My hunch seems confirmed when I look at the parts diagram for the bike and find that the front brake switch has been superseded for all years 2014 through 2020 with the switch used in the 2021 bikes. This always makes me curious.

Hope this is helpful and that it isn't a duplication of a thread I haven't come across yet.

Regards, Steve
 

sblissner

New Member
Joined
Oct 9, 2018
Messages
17
Location
Nashville TN
Sorry if I seem doubtful that a dealer will retroactively reimburse me. I've been a BMW owner for years and some of you know what that's like. Maybe I'll be surprised. the other problem is I ordered the part online from partspitstop.com not local dealer. In Nashville the car and powersport s dealers standard pricing is about 20% above dealer list.

Update. Third ride since replacement of the switch and all is good. Twisty back roads so lots of braking.
 

escapefjrtist

Searching for Dry Roads
Joined
Sep 5, 2010
Messages
1,418
Location
Snohomish WA
@sblissner - On the recall notice there's a paragraph that states if you have had this repair performed before receiving recall notice you may be entitled to reimbursement...contact Yamaha Customer Relations, 800-962-7926. At least it's worth a try!

I replaced the switch on my FJR a couple years ago and I'm certainly going to make the call. Good luck.

~G
 
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