I took the MAX out for the first run of the year yesterday and after about 30 min ride time the check engine light came on. I did the self diagnostic and it came up with error code 18 . I have no mods to the exhaust as of right now, and the only intake change I have made is the removal of the airbox restrictor plate and a high flow air filter added! I stored my MAX in a heated shed all winter, just did the spring oil and filter change and it has fuel stabilizer in the tank. Anyone know what this error code is and if I should be concerned ,I live about an hour ride away from my local dealer and would rather ride the bike than have to trailer it in ?

vmaxmercer

Thats from the service manual:

Fault code No. 18
Item EXUP servo motor: stuck EXUP servo motor is detected.
Fail-safe system
Able to start engine
Able to drive vehicle
Diagnostic code No. D:53
Actuator operation
Actuates the EXUP servo motor (turns to open side and to closed
side).
Illuminates the engine trouble warning light.
Checking method Check the operating sound.
Probable cause of malfunction Check or maintenance job
1 Connections
• EXUP servo motor coupler
• Wire harness ECU coupler
• Check the coupler for any pins that may be
pulled out.
• Check the locking condition of the couplers.
• If there is a malfunction, repair it and connect
the coupler securely.
2 Open or short circuit in wire harness. • Repair or replace if there is an open or short
circuit.
• Between EXUP servo motor coupler and ECU
coupler.
(black/white–black/white)
(black/red–black/red)
3 Defective EXUP servo motor. • Execute the diagnostic mode. (Code No. D:53)
• Replace if defective.
4 Defective EXUP valve, pulley, and ca-
bles.
• Replace if defective.
Reinstatement method
Turning the main switch to “ON”.
It takes 3 seconds at the maximum before the original state re-
turns.

Mice love to chew wiring?

"Mickey Mouse loves wiring" is right.

I once had Gold Wing backed it out of the garage and after 4 mice jumped out from under the engine cover I was really worried. Going down the highway at about 65 and I look and there is another one eyeballing me from atop the speed-o-meter. If my wife would have been on the back she would have crawled right off the bike. I was pissed so I flicked the little rat right off into oncoming traffic. The Jack Russell Terrier now runs rough-shot over the place and kills every mouse she can track down.

The damage those little critters did was unbelievable and it really showed up the next day in the rain. SO several hundred dollars later and many many hours of labor I got the bike repaired then sold it. Yeah its that bad you never know if you have all the wires repaired.

Lots of eradication after that incident.

Sorry for the issues ur having, but maybe u should of had a cat like this to keep the mice away

sfcrick wrote:


Put a small bowl of ammonia under your bike and those critters will run away when they get a wiff.

bigbikelupo wrote:



Thanks, I will check it out. At least I know I can ride it in to the dealer if it has to go and get serviced!

vmaxmercer

OK here is the problem, don't be to hard on me, I neglected to mark the cables and there position when I removed the exhaust over the winter. I removed the cables and the engine code is now gone, but now I have to put them back on the right way. Two cables one with a black adjuster and the other with a silver adjuster which cable goes toward the front and which one to the back, and how do I adjust them for the proper tension.

vmaxmercer

Black in front Silver in rear.

yox185 wrote:


Thank-you , I will put them back on tomorrow and adjust the cables!

vmaxmercer