Left knock sensor


Information and questions on GL1800 Goldwings (2001-2017)
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daveapace
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Joined: Fri Aug 07, 2009 7:49 am
Location: Boston UK
Motorcycle: 1992 GL1500

Left knock sensor

Post by daveapace »



Can anyone tell me how to remove the left side knock sensor on a.2001 gl1800.

Many thanks in advance.

Dave.


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Asphaltmaniac
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2006 1800 Goldwing
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Re: Left knock sensor

Post by Asphaltmaniac »

daveapace wrote: Thu Oct 26, 2017 4:01 pm Can anyone tell me how to remove the left side knock sensor on a.2001 gl1800.

Many thanks in advance.

Dave.
Dosent it just unscrew from the block? I'm sure you'd have too drop the exhaust system too get at it.
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AZgl1800
Posts: 2643
Joined: Thu Oct 30, 2008 2:46 pm
Location: Lake Oologah Indian Territory USA
Motorcycle: '02 GL1800
2009 Piaggio MP3 250cc

Re: Left knock sensor

Post by AZgl1800 »

Before you try to do that, I am going to suggest there is nothing wrong with it.

Pull the connector off the ECM and put a probe from a DVM, or an Oscilloscope on the lead that feeds the ECM from that sensor.

Now, take a ball peen hammer and tap the case near that sensor.

With the DVM on Frequency, or just watching the scope face, and with the sensitivity on both as low as it will go, I am willing to bet you see the DVM reading flutter all over the place.

We did on my '02 and it was the Left Sensor that gave us the FI reading count.

The problem is inside the ECM, I put a "new one" on the bike and it fixed the problem.

I was lucky, I found a 2004 being stripped of parts after a really bad front end collision with something.
~John

'02 GL1800
2009 Piaggio MP3 250cc
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AZgl1800
Posts: 2643
Joined: Thu Oct 30, 2008 2:46 pm
Location: Lake Oologah Indian Territory USA
Motorcycle: '02 GL1800
2009 Piaggio MP3 250cc

Re: Left knock sensor

Post by AZgl1800 »

Now, you can ride and ignore that FI reading, the only real problem is a loss of MPG, and for me that was approximately in the 4-5 range difference.


~John

'02 GL1800
2009 Piaggio MP3 250cc
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