Air suspension indicator and compressor


Information and questions on GL1200 Goldwings (1984-1987)
  • Sponsored Links
User avatar
Oldflyer
Posts: 36
Joined: Sun Mar 16, 2014 6:54 am
Location: Fredericksburg, Virginia
Motorcycle: 1984 GL1200A Aspencade

Air suspension indicator and compressor

Postby Oldflyer » Mon May 12, 2014 12:05 pm



The bike is a 1984 Aspencade. Sorry, forgot to mention that.

I am not able to get the air suspension indication on the LCD display, nor will the compressor run when I select front or rear and the proper increase button. The compressor will operate if the ignition key is set at Park. I have checked the 10 amp fuse and it is OK. I have removed the increase and decrease selector switches. The decrease switch when pressed will activate the solenoid, but the increase switch will not. I checked continuity of the increase switch and it is operating OK. Any ideas?

Bill



User avatar
robb
Posts: 1040
Joined: Mon Jul 19, 2010 7:46 pm
Location: Lexington, North Carolina
Motorcycle: 1989 Honda GL1500 Aspencade

Re: Air suspension indicator and compressor

Postby robb » Mon May 12, 2014 7:36 pm

Might be a bad relay, try swapping relays and look for change. On the 1500 there are 3 fuses associated with pump operation, would think more than 1 for 1200 also. Check all fuses.

User avatar
Oldflyer
Posts: 36
Joined: Sun Mar 16, 2014 6:54 am
Location: Fredericksburg, Virginia
Motorcycle: 1984 GL1200A Aspencade

Re: Air suspension indicator and compressor

Postby Oldflyer » Tue May 13, 2014 7:39 am

Thanks Robb for the suggestion. I will follow through.

Regards, Bill

User avatar
virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Air suspension indicator and compressor

Postby virgilmobile » Tue May 13, 2014 8:08 am

Oldflyer wrote: The compressor will operate if the ignition key is set at Park. Bill


The compressor relay is controlled by the display....when the bike is in the run position,it must be in neutral to operate the compressor and the display uses the neutral indicator to determine this......

Does your neutral lamp work?

User avatar
Oldflyer
Posts: 36
Joined: Sun Mar 16, 2014 6:54 am
Location: Fredericksburg, Virginia
Motorcycle: 1984 GL1200A Aspencade

Re: Air suspension indicator and compressor

Postby Oldflyer » Tue May 13, 2014 9:24 am

Yes, the Neutral lamp does work.

User avatar
virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Air suspension indicator and compressor

Postby virgilmobile » Tue May 13, 2014 10:23 am

Ok... I'm digging around trying to find a schematic of some sort...
Your bike...does it have the auto leveling system?
What buttons are available to push for the air...P.Check or just increase and decrease....
I assume the bike should show the pressure when you push a button....which ones?
Does everything else work? Radio,Trip computer..if it has them.
Can you post a picture or two of the display and buttons...I can't seem to find a proper manual for that one bike....
I also know about the neutral lamp circuit and how it affects the air system....I did find on a 83 model gl1100 that the neutral lamp was on,so to speak,however when the neutral wire that feeds the display was measured it was found to have almost 2 volts on it....Enough to keep the air system turned off but still light the lamp...A bad connection was located and repaired to reduce the voltage on that line to below 0.5 volts when in neutral.....As I recall it was a light green wire at the dash connector...Not a dark green ground....
This wire comes from the gear selector switch...a little voltage was not a issue in lighting the neutral lamp or operating the start solenoid but was enough to let the computer believe it was in gear...

User avatar
Oldflyer
Posts: 36
Joined: Sun Mar 16, 2014 6:54 am
Location: Fredericksburg, Virginia
Motorcycle: 1984 GL1200A Aspencade

Re: Air suspension indicator and compressor

Postby Oldflyer » Tue May 13, 2014 2:37 pm

virgilmobile:

Everything else works including radio, clock, trip computer. I am attaching some photos to show the control panel. Hope this helps. I don't know how, at this point, to access the connections that you speak of. I don't have any manual that shows the location of the various components---yet. The owner's manual is of no use for answers to these questions. The downloads don't want to work for me. Probably best if I buy a soft cover manual, so that I can page through it and refer to wiring diagrams at the same time.

The buttons that are available select Front or Rear and then to the right of those are Increase and Decrease. Hope that these photos will provide what you need.

Regards, Bill
Attachments

User avatar
virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Air suspension indicator and compressor

Postby virgilmobile » Tue May 13, 2014 2:48 pm

Thanks...
I'm looking at the closest schematic I can find...As far as I can tell,when you push one of the buttons on the left,it opens a valve to the pressure sensor so it can display the pressure for the button pushed...each button pushed also feeds the computer in the dash to tell it if it's to display front or rear pressure...
As far as I know,nothing will happen unless some safety circuits are active..
I'll find out what they are and post about them and where to find the test points...

User avatar
Oldflyer
Posts: 36
Joined: Sun Mar 16, 2014 6:54 am
Location: Fredericksburg, Virginia
Motorcycle: 1984 GL1200A Aspencade

Re: Air suspension indicator and compressor

Postby Oldflyer » Tue May 13, 2014 3:00 pm

The system was working when I bought the bike, just a little over a month ago. I know that there are some requirements for making it work, ie, the ignition switch must be ON, the engine shut off, and shift lever in neutral with the neutral light illuminated. Maybe I have missed something? I suspect that you are right---possibly a bad connection or a bad ground somewhere.

Bill

User avatar
virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Air suspension indicator and compressor

Postby virgilmobile » Tue May 13, 2014 3:02 pm

Go to the manuals section and download the gl1200 A and D service manual....This is my reference points.

User avatar
virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Air suspension indicator and compressor

Postby virgilmobile » Tue May 13, 2014 3:06 pm

The basic information where the parts are located start at PDF page 275.

User avatar
virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Air suspension indicator and compressor

Postby virgilmobile » Tue May 13, 2014 3:18 pm

I don't think you've missed anything...I'm looking for the relay...Do you have a volt meter?
Preferably a Digital one?

User avatar
Oldflyer
Posts: 36
Joined: Sun Mar 16, 2014 6:54 am
Location: Fredericksburg, Virginia
Motorcycle: 1984 GL1200A Aspencade

Re: Air suspension indicator and compressor

Postby Oldflyer » Tue May 13, 2014 3:22 pm

Yes, I do have a digital volt meter. I will follow your advice and let you know what I find. I will try that A & D download- or maybe I can just view the manual. That will work fine.

Thanks again, Bill

User avatar
virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Air suspension indicator and compressor

Postby virgilmobile » Tue May 13, 2014 3:49 pm

The schematic is PDF page 405...
Here's the details and what points to measure volts...this shouldn't be difficult to get to..Don't unplug the relay when you measure for volts and attach the meter ground lead directly to the battery negative post...


Test all these points and let us know what isn't right

User avatar
virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Air suspension indicator and compressor

Postby virgilmobile » Tue May 13, 2014 4:21 pm

Also it appears that the front/rear selector switch has 3 wires...They go directly to the display computer.The schematic calls it "selector valve" but I think its the switch...
I suspect that if you measure (what appears to be) the blue/yellow and blue/orange as you operate the switch you should see a voltage change...I do not know what it would be,but expect anything like....
the blue/yellow goes from 5 volts to zero or from zero to 12 volts....as long as there is something going on...It's the "I want to operate the air compressor" function input to the computer....
The third wire should be constant...(green/blue.??) ..either volts or ground...

User avatar
Oldflyer
Posts: 36
Joined: Sun Mar 16, 2014 6:54 am
Location: Fredericksburg, Virginia
Motorcycle: 1984 GL1200A Aspencade

Re: Air suspension indicator and compressor

Postby Oldflyer » Thu May 15, 2014 10:29 am

virgilmobile,

Sorry for the delay. I have made the tests of that 3 wire connector and here is what I get:

Blue/yellow--button pushed or not = 5.05V
Blue/orange-- button pushed or not = 5.05V
Green/blue--constant 96.1 mV with button pushed or not.

There is a clear plastic fuse holder located in this same area which has a spare fuse located with it. I don't know if this has any bearing on this problem. I opened the holder and checked the operative fuse and found it to be good.

User avatar
virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Air suspension indicator and compressor

Postby virgilmobile » Thu May 15, 2014 10:46 am

It sounds like you found your problem.As you select front or rear,one of those lines should go low volts to tell the computer that you want to see the pressure.
I'll bet 4 cents that if you short one of the wires that has 5 volts on it to the one that has the milivolts,the display will switch and then enable the compressor relay.
Sure sounds like a bad switch.

User avatar
Oldflyer
Posts: 36
Joined: Sun Mar 16, 2014 6:54 am
Location: Fredericksburg, Virginia
Motorcycle: 1984 GL1200A Aspencade

Re: Air suspension indicator and compressor

Postby Oldflyer » Thu May 15, 2014 4:15 pm

I did as you suggested and it still does not do anything. I went back and checked switch operation, just to double check and found all checks to prove that the switches are working. Still no display and no action.

When the ignition switch is selected to ON, the LCD display shows that both sides are operative with full scale indications, then reverting to actual fuel and engine temp displays, so the display is working.

User avatar
virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Air suspension indicator and compressor

Postby virgilmobile » Thu May 15, 2014 6:41 pm

When the key is turned on every display element is lit or turned on as a self test.
It's when you push the button,it commands the display to switch from temp to pressure.
I understand that the switch "tests" OK with the meter but it should also switch from 5 volts to near zero when the button is pushed.The computer monitors the buttons.It changes only when that voltage drops.
To the best of my knowledge,for the compressor relay to operate,one of the 5 volt lines must go to below 0.5 volts and the neutral wire must be below 0.5 volts too.
When you jumped the switch,did the volts go low.?

User avatar
Blue1Oldie
Posts: 10
Joined: Fri Jun 21, 2013 11:57 am
Location: Cly, PA
Motorcycle: GL1200
VT1100
CX650

Re: Air suspension indicator and compressor

Postby Blue1Oldie » Thu May 15, 2014 6:52 pm

The "push buttons" might have a rust issue as they make contact for everything to work. If there's a lot of oxidation/rust...it does dumb things. I've seen a thread either on this website or another where someone took the faceplate/switches apart (carefully) and used some emery paper to clean them up and re-installed. Worked good after that. SO, look for a post/thread on this site or another "GL Wing site" for pics and more info.

But I'd also change the 7 volt fuse to a new one....sometimes these "blades" rust as well. Just saying.

B1O

User avatar
Oldflyer
Posts: 36
Joined: Sun Mar 16, 2014 6:54 am
Location: Fredericksburg, Virginia
Motorcycle: 1984 GL1200A Aspencade

Re: Air suspension indicator and compressor

Postby Oldflyer » Thu May 15, 2014 7:26 pm

No, I am not getting any change when the INCREASE button is pushed. I have checked that Increase button for good continuity through the contacts. It tests good. I have also by-passed that switch altogether and crossed the two contacts in the plug, which performs the same function as if the push button was connected. The results are the same---no change in the display. I am wondering if there may be a broken wire somewhere?

When the DECREASE button is pushed, the relay is clicking. When the INCREASE button is pushed there is no clicking and, of course no compressor action--with either selection.

Where do I need to go next?

User avatar
Blue1Oldie
Posts: 10
Joined: Fri Jun 21, 2013 11:57 am
Location: Cly, PA
Motorcycle: GL1200
VT1100
CX650

Re: Air suspension indicator and compressor

Postby Blue1Oldie » Thu May 15, 2014 8:48 pm

Quite possible a broken wire in the wiring harness. You might have to look at the sub-harness that runs thru this area of the fairing back to the main harness. Might have had the fairing off and got some wires pinched.

Clicking noise when using the "rear/front" decrease button is just the valve opening to release air pressure in rear/front shocks. You should hear a little whoosh when you hold it for a few seconds. Bike is in neutral and running.

As for the increase button: I can start the bike (in neutral) on center or side stand and press button for increasing pressure to rear/front and the pump will "chatter" as it works. You can add air or decrease air pressure just using battery power without the bike running..........but it'll run you outta juice pretty quick. Plus, this low battery "might" not be helping to problem solve this issue. Sure wish I could find that website/thread/post. :x

B1O

User avatar
virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Air suspension indicator and compressor

Postby virgilmobile » Fri May 16, 2014 6:50 am

So there's no confusion,my reference to the "button" is the front/rear button.
With the key on,in neutral,either front or rear button should change the display from "temp" to pressure reading.
If it changes they you can hold it down and push the increase button at the same time to operate the compressor.
For it to operate,the display must first change.
Short 2 of the 3 wires together on the front/rear switch.See if the volts drop to near zero on that jumper.Its suppose to switch the display.
Please measure the 5 volt wire again when jumped.If it stays at 5 volts the display will never change.

User avatar
Oldflyer
Posts: 36
Joined: Sun Mar 16, 2014 6:54 am
Location: Fredericksburg, Virginia
Motorcycle: 1984 GL1200A Aspencade

Re: Air suspension indicator and compressor

Postby Oldflyer » Fri May 16, 2014 11:40 am

I have double checkeg this morning, voltage readings, continuities and can find nothing. It still does not work. I am a bit discouraged and about ready to turn this problem over to an experienced local Honda mechanic who knows something (if that is possible) and let him sort it out. I hate the thought of doing that because I fear it would be the same as taking your car to dealer to get "hosed" as is so often the case. I just don't know where to look next.

Bill

User avatar
virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Air suspension indicator and compressor

Postby virgilmobile » Fri May 16, 2014 12:04 pm

Don't get discouraged....yet :D
You would be hard pressed to find any Honda mechanic that is well versed in a 30 year old GoldWing computer controlled air suspension system.
When you jumped the front/rear selector wires,did the 5 volt reading go to near zero....
I just tested one I have from a gl1100,the exact same color codes.
I also measured 5 volts on the blue/yellow,blue/orange... and zero volts on the green/black...
When I jump either one to the green black,the 5 volts goes to zero and the display switched to pressure reading....
This also needs to happen on yours before anything else will work...

Now It's possible that the computer does not work any more...if it's determined that it's bad there is a "manual" option to get it functional again by bypassing the computer...It would take a bit of wiring and a mechanical pressure gauge with a air line...but it is feasible.A last ditch effort...




Return to “GL1200 Information & Questions”




Who is online

Users browsing this forum: Outbound86 and 1 guest