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2018 DCT Tour 15amp Audio Fuse Keeps Blowing

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audio fuse 2018+
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#41 ·
All those surface mount IC's that accomplish nothing other than causing failures. When Zenith introduced the first digital TV around 1989 or whenever the piece of crap had like 25 IC chips, and the factory procedure to repair was "replace the most logical IC to repair, then if not working replace 2nd, then 3rd, then after 25 replace the board" $30 per IC. Garbage then, Garbage now.
 
#42 ·
dbmachine said:
A quick search I found some beneficial documents on the audio unit.

fccid.io

MKCAU Infotainment headunit User Manual x Harman Automotive Electronic Systems (Suzhou)

Infotainment headunit User manual v1 details for FCC ID 2ACRLMKCAU made by Harman Automotive Electronic Systems (Suzhou) Co., Ltd. Document Includes User Manual User manualx
fccid.io fccid.io
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Thanks for that information. Looks like it was designed and built completely in China. This might also explain why we aren't seeing anymore Nav updates. Honda made a colossal mistake when they didn't use Garmin.

Line one:No125 Fangzhou Rd, Suzhou SIP, Jiangsu, China
City:Suzhou SIP
State:N/A
Country:China
Zip Code:215024
 
#43 · (Edited)
I received the defective audio unit, and have inspected it. I'm not able to see any physical damage or burned components. I was hoping to find something visibly damaged to help me troubleshoot. Unfortunately, the entire board is conformal coated, which is going to complicate further troubleshooting attempts. I've shipped it off to someone with better skills, equipment, and connections to take a look at it.

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#45 ·
I have no use for music on a motorcycle, and have yet to see if the audio system on my 2022 Tour even works. I'm betting this component is critical to other operations of the bike. If this device, the infotainment center being tested, fails completely, is the Wing still operational?
 
#47 ·
Fred H. said:
I received the defective audio unit, and have inspected it. I'm not able to see any physical damage or burned components. I was hoping to find something visibly damaged to help me troubleshoot. Unfortunately, the entire board is conformal coated, which is going to complicate further troubleshooting attempts. I've shipped it off to someone with better skills, equipment, and connections to take a look at it.

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Fred, ”why” do portions of the circuit board appear to be white and all green? Is the conformal coating coming loose in those areas?
 
#48 ·
It appears to be a light reflecting off the coating.
 
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#49 · (Edited)
murf said:
Fred, ”why” do portions of the circuit board appear to be white and all green? Is the conformal coating coming loose in those areas?
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It's a multi-layer board (which makes troubleshooting even more problematic) and I think what you're seeing are the various layers inside the board, which make it appear to be different shades of green in places. The conformal coating never goes on perfectly either, and some places it may have dried differently than others.

The blue stuff is thermally conductive grease designed to allow the chassis to act as a heat sink for some of the workhorse IC's that build up heat.
 
#50 ·
From reading some of the comments in FB the bike is operational but you can’t adjust the suspension settings on the tour models and access other functions in the vehicle settings. Also the ride mode indicator will flash continuously so that you don’t know what gear or mode you’re in. This was for a dct bike. Of course you will have no audio, nav, phone, Bluetooth etc, but the the bike is still drivable and functional.
 
#51 ·
dbmachine said:
From reading some of the comments in FB the bike is operational but you can’t adjust the suspension settings on the tour models and access other functions in the vehicle settings. Also the ride mode indicator will flash continuously so that you don’t know what gear or mode you’re in. This was for a dct bike. Of course you will have no audio, nav, phone, Bluetooth etc, but the the bike is still drivable and functional.
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Basically a crippled bike...who would enjoy riding this bike like that
 
#54 ·
Fluke189 said:
All those surface mount IC's that accomplish nothing other than causing failures. When Zenith introduced the first digital TV around 1989 or whenever the piece of crap had like 25 IC chips, and the factory procedure to repair was "replace the most logical IC to repair, then if not working replace 2nd, then 3rd, then after 25 replace the board" $30 per IC. Garbage then, Garbage now.
Click to expand...
Nothing worse than playing Mr. Goodwrench and throwing parts at a problem until something sticks. I don't believe ICs are evil and feel they are beneficial for circuit density and compactness on our bikes. You would not want to see how big the box would be if they used individual components. I just hope I never have to deal with this nonsense on my bike.
 
#55 ·
Crabballs said:
Nothing worse than playing Mr. Goodwrench and throwing parts at a problem until something sticks. I don't believe ICs are evil and feel they are beneficial for circuit density and compactness on our bikes. You would not want to see how big the box would be if they used individual components. I just hope I never have to deal with this nonsense on my bike.
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Totally agree. Without those IC's, our infotainment system would be the size of a refrigerator at least.

Motor vehicles have had fuel injection systems (containing IC's) for 30 or 40 years now. Most of them are still running just fine but there are always a few failures in anything.

The problem with this infotainment unit blowing 15A fuses will almost certainly not involve those high density surface mount IC's. I'm putting money on a capacitor, diode, or voltage regulator in the power supply area or something in the audio power amp stage.
 
#56 ·
AussieChris said:
Totally agree. Without those IC's, our infotainment system would be the size of a refrigerator at least.

Motor vehicles have had fuel injection systems (containing IC's) for 30 or 40 years now. Most of them are still running just fine but there are always a few failures in anything.

The problem with this infotainment unit blowing 15A fuses will almost certainly not involve those high density surface mount IC's. I'm putting money on a capacitor, diode, or voltage regulator in the power supply area or something in the audio power amp stage.
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Gotta agree with your diagnosis. I would suspect power amp or shorted trace. I've worked on stuff that had a ball of solder rolling around inside the case shorting out traces that were not sealed, usually next to connectors.
 
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#57 ·
Roadie said:
I would hope if this problem was widespread..and its not....that Honda would step in with some sort of solution...setup a repair facility and fix the units.
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Unfortunatly, electronic items are built to be thrown away, and not repaired. Very few if any facilities exist that do troubleshooting and/or individual component level repairs on circuit boards anymore.
 
#58 ·
#59 · (Edited)
I run into shorted surface mounted capacitors. They are often about 3/16 x 1/8 inch. The smaller ones don't seem to short out, just these bigger ones.
If you have a power short, you can apply some current (1/4 - 2 amps, depending) and use an infrared meter to narrow down the culprit.
I end up having to do this almost once a week. Here is an example of one:

Image
 
#60 ·
Help me understand this potential problem, does it NOT occur if you don’t use the radio/speakers? Or just it just pop for no reason?
 
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