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PeterE

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Posts: 5
Reply with quote  #1 
I have a etec 150 2016 that has very low hours, been running fine, also have icon pro tach and speedo. Each time I start up the engine now the tach and speedo go through self test, displays go dark and I get a repeating alarm. User guide says erratic gauge behavior could be low voltage. I checked voltage at violet source and its looks good. Source where I bought engine hasn't had time for road trip and wants me to trailer it to him for diagnostics. I checked all connections and fuses that I am aware of and everything looks good. From reading many of the posts here I understanding all things with these icon pro gauges start with the tach. Any recommendations on what I can check next ? 
jimh

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Posts: 6,382
Reply with quote  #2 
Disconnect all devices downstream of the ICON Pro RPM gauge. Disconnect ICON Pro RPM gauge from NMEA 2000 network. Apply good clean 12.0 VDC power to ICON Pro RPM gauge. Report outcome.
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PeterE

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Posts: 5
Reply with quote  #3 
Thank you for reviewing my post. I disconnected RPM gauge at NMEA connection from NMEA backbone. I also disconnected the Speedometer harness (4 wire connection) from the RPM gauge. Removed fuse to GPS unit so all power going to RPM gauge. Verified 12.5+ volts at purple power input with key on, motor running. RPM gauge blinks erratically and alarm sounds.
jimh

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Posts: 6,382
Reply with quote  #4 
If the ICON RPM gauge was never used in saltwater, remove the gauge from the boat. Remove any rubber sealing plugs on the back of the round housing. Place the gauge in a well-regulated temperature controlled environment with a maximum temperature of about 140-degrees. Let the gauge sit for two days. This may dry out any moisture inside the housing.

If used in saltwater there may be little hope for evaporative recovery.

The housing can be opened by carefully un-crimping the thin metal circumferential surround. If the circuit boards can be seen, a very carefully visual inspection MIGHT find evidence of water damage. Spraying the area of the circuit board where there appears to be water damage with WD-40 MIGHT help.

The general problem with disassembling the ICON Pro series gauges will to to re-assemble them and not break something.

There is an archived discussion on this website that showed internal views of an ICOM Pro series RPM gauge; reviewing that discussion may be useful.

If a careful drying out is not a cure, I am out of suggestions.

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PeterE

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Posts: 5
Reply with quote  #5 
Thank you again, I will try your suggestions, I am definitely using this in a saltwater environment. Would you agree that it appears the problem is related directly to the RPM gauge based on its behavior being isolated from all the other components? I am outside my 3 year warranty period so if your suggestions don't pan out I will probably replace the RPM gauge as I need my to monitor engine metrics. 
jimh

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Posts: 6,382
Reply with quote  #6 
Replacement may be the only option.

I don’t know of a power-on self-test procedure. I don’t know of a way to reload the gauge firmware in the field.



Here are two more ideas to try:

The ICON Pro RPM gauge has shown me some quirky behavior, particularly with display brightness.

The dark display may be due just to a bad backlight setting. Use a strong flashlight and shine light into the LCD display to act as a temporary backlight. You may discover the gauge is working but the display is too dim to see.

The “alarm” may be due to a front panel button being stuck held down. Manipulate the three buttons to check that one is not stuck.

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rickmcd53

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Posts: 2,491
Reply with quote  #7 
Jim, my interpretation of PeterE's last test results was that he power up the gauge with no NMEA cable connected.
PeterE

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Posts: 5
Reply with quote  #8 
Rick, Yes the NMEA cable was NOT connected to the NMEA network. Should it be connected to the basic T connected with terminators on each end.

     RPM Gauge ---   NMEA connection
                         |
                 Term -- Term
jimh

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Posts: 6,382
Reply with quote  #9 
For the test I proposed there is no need to connect the gauge under test to a NMEA network.


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PeterE

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Posts: 5
Reply with quote  #10 
Jim, I wanted to thank you again for your recommendations. Diagnostics lead me to pickup a new tachometer gauge, this solution fixed the problem. I did notice in the process that my old gauge which was installed new with my new 150 etec was from year 07 :-( The new gauge I just replaced it with is from 20... Best regards, Peter
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