Is it a manual reverse with a handle or is it a electric/servo motor that puts it in reverse??

 

his avi says gsxle 900 . so must be electric .

 

I would make sure that your chain tension is correct and your contacts / switches / electric plugs are all in place correctly!

Just a guess though!

 

I would think it's maybe just slightly out of adjustment, take it to the dealer and have them fix it.

 

this is week two with the same issue.. only we haven't had the luck where it works intermittently worked fine all last year and up until 2-weeks ago then I have only been able to get it to work once.. no recent belt changes, tried slacking off the chain, checked the connections.. and of course the Dealer is saying its two weeks before they can even look at it much less then schedule an appointment to come back and fix it.. any brain storming would be most welcome!

 

have you checked the drive belt adjustment ?

 

Open the side panel and watch the action of the servo and see if it engages the reverse link or does it slip back to original forward position possibly just needs a half turn on the adjusting rod to lengthen it to stay engaged.

 

The drive belt in the 1200's must be set differently for electro reverse to work properly.

 

this is week two with the same issue.. only we haven't had the luck where it works intermittently worked fine all last year and up until 2-weeks ago then I have only been able to get it to work once.. no recent belt changes, tried slacking off the chain, checked the connections.. and of course the Dealer is saying its two weeks before they can even look at it much less then schedule an appointment to come back and fix it.. any brain storming would be most welcome!

Wow, you're dealer sucks.

 

How good are you with a multimeter?

Of course make sure that the fuse is not blown.

From what I could tell by looking at the parts diagram. It uses motor similar to a car window motor to actuate a lever on the chaincase.

Do you hear any noise when you attempt to shift into reverse?

It is a DC motor so you need to check to see if it is getting power when you try to put it in reverse.

It may have developed condensation inside and corroded the brushes.

 

hello all thanks for the feedback! when you hit reverse button rpm's drop headlight dims a bit, three short beeps and rev. failure on the dash. with the side panel open the linkage lever doesn't move at all. unfortunately they must have changed the motor/mechanism from my '13 1200 GSX to this 14' 900 ACE GSX as its all different do I don't think I can swap parts to see what's not working. it is way more involved just trying to take it apart. on my 1200 when I change gear lube I can take the motor/linkage off move it aside and get the cover off.. when I changed the 900 ACE I gave up and just cracked the cover and let it drain out the bottom.. I'll have to see if I can find a parts diagram to see what connections are for the motor and what not as there is a bunch of wires in that area including relays.. I'm can use a Multimeter but must admit I can't read an electrical schematic..

 

I am going to buy a service manual for my 2015 Renegade 900 ACE. I also plan on buying a CANDooPro.

When I was looking at the parts diagram I noticed that those 2 relays are identified as being part of the reverse mechanism.

Maybe one of then is bad or needs to be replugged.

I am looking at google images for a wiring diagram which might show the reverse motor control.

 

what part diagrams did you find? i've just spent 45 minutes on three different doo dealer site and none show the electronic mechanisims for reverse just the mechanical lever reverse..

 

I'm assuming you checked the fuse? My reverse stopped working last year and was just the fuse.

 

what part diagrams did you find? i've just spent 45 minutes on three different doo dealer site and none show the electronic mechanisims for reverse just the mechanical lever reverse..

http://parts.ski-doo.com/Index.aspx?s1=oj91qg154r5l3rih694erkpq83&catalog_id=0&siteid=1

This only gets you close.

They you select 2015-> GSX-> GSX 900ACE LE XS120,2015->Electrical Harness Reverse

Or you select 2015-> GSX-> GSX 900ACE LE XS120,2015->Electrical System

Part # 70 is the motor, part # 75 is the reverse harness which includes the pair of relays. Those are probably standard relays that you can buy at NAPA or Radio Shack. The whole circuit can be tested.

 

I am sure that the way that the 2 relays work is to change the DC polarity on the motor. That is how a DC motor is reversed.

The switch selects which relay to energize. I am surprised that they use 2 relays. Some relays have the inverted switch function built in. Just wondering if there is some safety/redundancy provided by using two relays. It could also be that one relay prevents the accidental engagement of reverse if the sled is moving. It is hard to tell without a wiring diagram. I'll keep looking.

I was not able to locate a service manual online. Evidently you can get one through the dealer.

 

I did notice that the relays are of the 5 circuit type which to me indicates that they include the inverted switch function.

I was not able to find any wiring diagrams for the GSX reverse control.

Does anyone have a service manual or a wiring manual? I know that I could debug this if it was in my garage. :cool_old:

 

My wifes 900ACE is having the same problem. When you press the switch it sends a signal to the ECU, and the ecu operates the relay to activate the motor. It knows what relay to activate dependant on the position of the reverse sensor. Pretty simple circuit to trouble shoot. First check the 20 amp fuse in the fuse panel. If you have a test light or multimeter check fpr voltage at the white connector at the Motor when you press the switch.

My guess is that you are getting voltage to the motor because your lights dim when press reverse, Excessive current draw!!, Take the bolt out of the hyme joint that connects the motor to the shift lever to make sure the shift mechanism is not bound up.Youcan remove the upper plug from the chaincase and when you move the lever that you disconnected you will see the shift fork move.if it is not damaged. If it moves freely and you are getting voltage to the motor your motor or the gears on the shift assembly are damaged.

My wifes900 is going to the dealer Tuesday to have the motor assembly replaced

Hope this helps

 

I did notice that the relays are of the 5 circuit type which to me indicates that they include the inverted switch function.

I was not able to find any wiring diagrams for the GSX reverse control.

Does anyone have a service manual or a wiring manual? I know that I could debug this if it was in my garage. :cool_old:

5 pin relays usually have terminal 30- power in, terminal 87 power out, normally open, 87a power out, normally closed and 85, 86 to either disconnect power to 87a or connect power to 87.

4x4 shift motor on electronic shift on the fly trucks are sometimes set up the same way. 1 relay clockwise, 1 relay counterclockwise.

The relay would need to switch polarity also to the ground.

I would make sure the belt is not too tight. Lift the back of the sled and idle the engine, make sure the track doesn't want to creep.

If there is any drag at all on the jackshaft, it will be hard to shift to reverse. That's why standard transmissions cars have a clutch

 

Thanks for the information on the relay terminals 351c.

Since he is getting the Reverse Failure warning light, the ECU knows that something is wrong and may be purposely holding back the signal to the reverse relay. The ECU should be able to sense that the latching coil on the reverse relay is an open circuit or that the reverse motor is an open circuit both of which would prevent reverse.

I would at least unplug/plug the relays. Testing the terminals with an multimeter would be the next logical step.

 

My first post here, sorry it's about trouble shooting an electric reverse problem.

I just picked up a 2014 Grand Touring LE 900 ACE with 550 miles on it (Rev-XR chassis). Went on my first long rides this weekend. Everything was working perfectly. Used Reverse several times with no issue on three separate rides over two days.

After the last ride (I had used reverse on the ride with no problems), I went to put the sled in the trailer and I had no reverse, but did see the "Reverse Error" message.

It looks like I have the same symptoms as in this thread. When I press the reverse button, I can see the headlight slightly dim, but no other noises. It just takes a couple of seconds when the 'Reverse Failure' message shows up with the error beep.

The fuse was ok. Mine is a hard failure, so far, it is not intermittent. The belt looks flush with the top of the secondary pulley.

I didn't see any conclusion to this thread, so I was wondering what the final fix/cure was? Of course, I know that every failure could be different, but I was just looking for some clues to the problem.

Before my ride, my dealer did tell me that there was some sort of recall or TSB on my clutch, but he said there was no rush to do the work, so I don't know if it could be related to the electrical reverse failing.

Thanks for any help or clues. If I can't find something easy, I'll take the sled to the local dealer later this week.

FOLLOWUP: Dealer replaced a faulty relay to fix this issue. Luckily it was covered under my sled's warranty.

Rich

 

My first post here, sorry it's about trouble shooting an electric reverse problem.

I just picked up a 2014 Grand Touring LE 900 ACE with 550 miles on it (Rev-XR chassis). Went on my first long rides this weekend. Everything was working perfectly. Used Reverse several times with no issue on three separate rides over two days.

After the last ride (I had used reverse on the ride with no problems), I went to put the sled in the trailer and I had no reverse, but did see the "Reverse Error" message.

It looks like I have the same symptoms as in this thread. When I press the reverse button, I can see the headlight slightly dim, but no other noises. It just takes a couple of seconds when the 'Reverse Failure' message shows up with the error beep.

The fuse was ok. Mine is a hard failure, so far, it is not intermittent. The belt looks flush with the top of the secondary pulley.

I didn't see any conclusion to this thread, so I was wondering what the final fix/cure was? Of course, I know that every failure could be different, but I was just looking for some clues to the problem.

Before my ride, my dealer did tell me that there was some sort of recall or TSB on my clutch, but he said there was no rush to do the work, so I don't know if it could be related to the electrical reverse failing.

Thanks for any help or clues. If I can't find something easy, I'll take the sled to the local dealer later this week.

Rich

The rev failure on mine turned out to be a relay (part # 515177041). Replaced under warranty.

Have used/tested it about 20+ times since with no issues so far.

 

Thanks, I wish I had a schematic, I could probably figure it out, I'm good with electrical issues as long as it's not a failed CPU board.

 

Last time my wifes 2015 GSX900 had this failure the dealer said it was the belt adjustment. It may have been a little tight about 1/16 over the top of the secondary but since they adjusted it flush and it was working I agreed. It worked for a few weeks and does not work again. Belt adjustment has not changed. I even took the belt cover off and tried to engage reverse while making sure there was no tension on the secondary. I am getting voltage to the servo motor like before but nothing happens.

Seriously thinking of trading for a 600 etec for next year. This 900 is too finicky and after 100 miles of non aggressive trail riding it only uses 1 gallon less fuel than my XRS. Not worth the inconvenience.

I apologize for the rant, just frustrated.

 

Last time my wifes 2015 GSX900 had this failure the dealer said it was the belt adjustment. It may have been a little tight about 1/16 over the top of the secondary but since they adjusted it flush and it was working I agreed. It worked for a few weeks and does not work again. Belt adjustment has not changed. I even took the belt cover off and tried to engage reverse while making sure there was no tension on the secondary. I am getting voltage to the servo motor like before but nothing happens.

Seriously thinking of trading for a 600 etec for next year. This 900 is too finicky and after 100 miles of non aggressive trail riding it only uses 1 gallon less fuel than my XRS. Not worth the inconvenience.

I apologize for the rant, just frustrated.

Hang in there. There are guys hammering these things with no issues.

I'd get your machine to the dealer (maybe a different one). This will also get it documented your still having the same problem.

This winter mine was in for the rev failure and it turned out to be a relay. Had my dealer check over the entire driveline as my warranty is up this June. My belt is still over the top of the secondary (as it was when I took delivery). He said that is spec. Also check your drive chain for proper tension.

Tested the hell out of mine and all is good so far.