610 Display problem

[ChrisP]

2006 SM 610, 3000 miles
My display unit went crazy then cut out. No speedo or tach Just background light. All the warning lights (turn signal, high beam, low fuel) are constantly on. acts like a dead short.
I pulled the unit and tried it on another bike. The unit works fine. The issue appears to be with the wiring on the bike. Anyone else experience this problem?

Chris

 

[dukepilot]

Same thing happened on my bike. Try disconnecting and reconnecting your battery. Also check fuses, battery charge level, make sure you have a solid ground connection.

 

[xymotic]

Yep, as above, and get ready to order a Vapor or something similar

 

[jerbear610]

Mine works intermittenly as well. It just comes and goes. Last couple rides it has worked
great but a lot of the time, nothing. Disconnecting the battery cables is a temporary fix
but I guess you just have to replace it or something for perminent fix. On a positive note,
my speedo is right on money mph wise as I opened her up on a mountain road last weekend
and hit 105 mph on a slight downhill w/14 CS fully pegged. According to my gps tracks I hit
105 mph exactly on that stretch so the speedo is accurate......when it works....

 

[ChrisP]

Thanks for the replies.
I had already experienced the failure that requires disconnecting the power. This is different. In this case, no speedo and the indicator lights come on and they all stay on constantly. The unit works perfectly when installed on another bike. I am fearing that the problem is in the ECU since all the wiring harness seem to go to the ecu

 

[K7MDL]

Thanks for the replies.
I had already experienced the failure that requires disconnecting the power. This is different. In this case, no speedo and the indicator lights come on and they all stay on constantly. The unit works perfectly when installed on another bike. I am fearing that the problem is in the ECU since all the wiring harness seem to go to the ecu

Not the ECU and not the wiring harness. You are experiencing the same problem. The Speedo is not "booting up" completely. Power cycling with the key sometimes makes it complete startup, otherwise powering it off by disconnecting the harness or battery may recover it. This is what you did when you put it on another bike. Eventually it will never recover.

Check out http://www.advrider.com/forums/showthread.php?t=482490

 

[ChrisP]

Sorry, guess I didn't give enough info in my explanation. When I plug my speedo into my buds bike, it boots up fine. Plug back into my bike and no-go. Plug his speedo into my bike , no-go.
In this case, the prob is with the bike. I just bought an ECU and wire harness on e-bay for $100. It's a gamble.

 

[K7MDL]

Sorry, guess I didn't give enough info in my explanation. When I plug my speedo into my buds bike, it boots up fine. Plug back into my bike and no-go. Plug his speedo into my bike , no-go.
In this case, the prob is with the bike. I just bought an ECU and wire harness on e-bay for $100. It's a gamble.

Hmmmm... that is different. Odd result for a system or wiring harness issue. Before you plug the new ECU in or do anything else, I would suggest you measure the voltages on each pin of the speedo harness and record them. Also measure the battery voltage while the bike is running, at startup and after several minutes of idle. See if it climbs well above 15VDC. It should not.

 

[ChrisP]

Excellent idea. I will do that

One more thing you may not have caught in my initial post. (which was making me think short or bad ground) is that the display lights (turn signal / highbeam/ low fuel) come on instantly as soon as the key is cycled to the on position and stay on as long as the key in the on position. Normally those lights come on during the initial boot up then turn off once booted up

 

[K7MDL]

Excellent idea. I will do that

One more thing you may not have caught in my initial post. (which was making me think short or bad ground) is that the display lights (turn signal / highbeam/ low fuel) come on instantly as soon as the key is cycled to the on position and stay on as long as the key in the on position. Normally those lights come on during the initial boot up then turn off once booted up

That symptom maps very well with the (fail to boot) theory. The signals go to circuitry that sense the state and are "relayed" to the LEDs. I believe most of these signals are conditioned and detected by the CPU. The CPU is not initializing and does not set the proper state of each signal to the LED. That is also why the speed digits are not displayed, but the backlight is on. When the speed digits are displayed, but not changing, then you have a locked up CPU or a broken wire or missing magnet.

The ADVRider speedo thread I linked earlier has the pinouts and signal expected on each wire. There is switched and unswitched power. For ground connection(s) ohm those out. Make sure they are really ground. Lots of detailed info in the link. I eventually gave up on my flaky one and put a Trailtech vapor on. Much happier, less trouble :-).

- Mike

 

[ChrisP]

Thanks Mike,
I am close to giving up and going the vapor route as well. I will go through the Adv rider thread

 

[ChrisP]

Plugged in the harness I bought on E-bay and everything boots up fine !