GL1500 will not start


Information and questions on GL1500 Goldwings (1988-2000)
Post Reply
bcarnold
Posts: 25
Joined: Mon Aug 23, 2010 12:40 am
Location: Los Angeles, Ca
Motorcycle: 1992 GL1500A Aspencade

GL1500 will not start

Post by bcarnold »



My GL1500 Aspy decided to quit on me while in the carpool lane. I noticed that about 5 minutes before it quit, I felt a quick vibration under the seat that lasted only a second.
When I started to troubleshoot, it looked like the fuel pump was bad, I installed a replacement and further reading both here and in the Clymers manual indicated that the ECM could have a burned out transistor. I pulled the ECM and checked the transistors and all 3 had the same .5 ohm reading across the outside legs. The Clymers manual shows that is should be much higher. I also noticed that the plug pinout is different then what is shown in the manual and is much different that a recent post here.

My next steps are to check the TW and TA sensor and the band angle sensor. Can someone please tell me where these sensors located and what else I should check while I'm at it.

Any help is greatly appreciated.


User avatar
Rambozo
Posts: 1230
Joined: Sun Apr 01, 2018 8:36 pm
Location: Disneyland
Motorcycle: 1992 GL1500 Aspencade
Ducati Monster

Re: GL1500 will not start

Post by Rambozo »

Did you check for power at the fuel pump when cranking?
bcarnold
Posts: 25
Joined: Mon Aug 23, 2010 12:40 am
Location: Los Angeles, Ca
Motorcycle: 1992 GL1500A Aspencade

Re: GL1500 will not start

Post by bcarnold »

Thanks for your help,
After I replaced the fuel pump I checked for power at the pump but found none. I also pulled all of the plug wires to check for spark at any of the plugs and I also found none.
User avatar
WingAdmin
Site Admin
Posts: 22508
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (sold)
1998 XV250 Virago (sold)
2012 Suzuki Burgman 400 (wife's!)
2007 Aspen Sentry Trailer
Contact:

Re: GL1500 will not start

Post by WingAdmin »

bcarnold wrote: Wed Jan 12, 2022 12:25 am Thanks for your help,
After I replaced the fuel pump I checked for power at the pump but found none. I also pulled all of the plug wires to check for spark at any of the plugs and I also found none.
Have you checked for any blown fuses? I wonder if your ECU is seeing power? The ECU controls both the fuel pump and the triggering of the spark plugs.

Also, I know it has to be said, but...check your kill switch. :)
bcarnold
Posts: 25
Joined: Mon Aug 23, 2010 12:40 am
Location: Los Angeles, Ca
Motorcycle: 1992 GL1500A Aspencade

Re: GL1500 will not start

Post by bcarnold »

Gents,

I would like to say that I did check the fuses and the kill switch, but I will check them again tomorrow.

Seeing that the transistors in the ECM all have the same ohm reading and nothing appeared to be burned or smoked I am considering the pulse generator may have shifted, or the BAS, tw or ta sensor.

The first question that I have is; why was there a vibration (like the engine was suddenly loaded down or unloaded) a few minutes before the bike stopped. The only time I felt the same vibration was a few months back when the alternator brush was sticking. Maybe it is unrelated but I thought I would ask.
bcarnold
Posts: 25
Joined: Mon Aug 23, 2010 12:40 am
Location: Los Angeles, Ca
Motorcycle: 1992 GL1500A Aspencade

Re: GL1500 will not start

Post by bcarnold »

Gents,
The starter does crank the engine over, the kill switch is in the run position and the fuses test good.
I don't know if the bank angle sensor has been changed, I read on this forum that the dealer will scribe a "X" on the bottom of the frame if the BAS has been replaced. I will check the frame for a make and the sensor tomorrow. The thread that I read did to include how to test it, just a rattle test.
I will let you know what I find
User avatar
Rambozo
Posts: 1230
Joined: Sun Apr 01, 2018 8:36 pm
Location: Disneyland
Motorcycle: 1992 GL1500 Aspencade
Ducati Monster

Re: GL1500 will not start

Post by Rambozo »

If the starter cranks, the BAS is not the issue.'
The X isn't always done. However, the BAS does have a date code on it, so you can verify it has been replaced.
bcarnold
Posts: 25
Joined: Mon Aug 23, 2010 12:40 am
Location: Los Angeles, Ca
Motorcycle: 1992 GL1500A Aspencade

Re: GL1500 will not start

Post by bcarnold »

The BAS appears to had been replaced. The date code is 95 x x.

The bike does crank over, just no spark.

I benched tested all of the relays, the relays activate when energized.

I checked the BAS for continuity . There is no continuity between the three terminals either “level, tilted left or right.

Also, there is no sound from the relays when the bike is turned on. The only sound is a chime when the bike is turned on
bcarnold
Posts: 25
Joined: Mon Aug 23, 2010 12:40 am
Location: Los Angeles, Ca
Motorcycle: 1992 GL1500A Aspencade

Re: GL1500 will not start

Post by bcarnold »

Gentlemen,

I greatly appreciate your input and suggestions while I worked through this problem.
I also learned that sometimes the simplest of causes are often overlooked and hiding in plain sight.
So far, I checked the BAS, fuel pump, ECM, spark, kill switch for correct position, fuses, all relays and I started to dig into the TA and TW sensors but not necessarily in this order.
I did finally locate the failure, it was the one thing that I did not check and completely overlooked, a defective kill switch.

I greatly appreciate your help.

Now onto looking or a replacement switch

Thanks again.
User avatar
DenverWinger
Posts: 2055
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: GL1500 will not start

Post by DenverWinger »

I understand the wires are held onto the kill switch with little eyelets and screws, not soldered. Might open the switch housing and look, sometimes the screws work themselves loose. Switch might actually be OK.

I never use the kill switch myself, so if it were my bike with a bad kill switch I'd just bypass it. :D
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark
bcarnold
Posts: 25
Joined: Mon Aug 23, 2010 12:40 am
Location: Los Angeles, Ca
Motorcycle: 1992 GL1500A Aspencade

Re: GL1500 will not start

Post by bcarnold »

Hi DenverWinger,
Both screws were loose, I tightened them, but still the same problem and the switch does appear to be removable.

I like your suggestion to bypass the switch,That will work until I can locate a good replacement. The bike has been down to long.


Post Reply