Electrical Problem

[TechStar]

Alternator/Electrical Problem: As the RPMs on my S22 increase, the voltage as registered on the meter decreases to 10 or less. This sets off the low voltage alarm on the AccuSki. Atlanta Marine claims this can not be fixed. I need help getting this problem resolved.

[lesman01]

Welcome Techstar! there's a few atlanta boys in here. I've had that same intermittent problem too, I think there's a whole thread about  it.

http://www.cyclone-cj.com/forum/index.php?board=1;action=display;threadid=315

also do a search for "voltage alarm" and change the days from 60 to 365.

[cyclone]

AAHHH FEEELL YOUUUUUUUURRRR PAAAIIIIIIIIIIN.

Bottom line is, the alarm means nothing. First two things to try, locate the inline 20a fuse near your Perko battery switch. Check the fuse for corrosion, then use lithium (white) grease or silicone grease to seal  it up and fill the space to keep water out.

Next, lie on your back and look up at the underside of your dash.

Push together all of the big white inline electrical connectors for all the wiring under the dash. There are six or so big ones.

Locate the switchbox (howto page) that makes your dash switches work, there are studs on each end that have a red or black wire (10ga) coming from the Perko switch and fuse. This is the dash supply. Make sure that the 3/8" or so nut that secures the wires are tight.

That should at least help that or other problems.  I continue to have fluctuating gauges common to this brand of gauges and servo driver computer.  Lots of ski boats use or did use these gauges.

The red and black 10ga wires are the ones that I suspect are too small, there are other suspect places too.

 I was in the middle of troubleshooting those (false) gauge alarms when it got cold. I also need the pinout drawing for the MDDC gauge computer in the trunk. I am trying to measure voltage drop into the box. I think the supply wire is too small to the box. The thing is you have to have someone get on the swim platform with a multimeter while driving about 25 mph. I will rig up an LCD panel meter to take readings this winter. I need to know the pinout first, there are about four each black and red 20 ga wires going into the box that I believe are the supply. I measure a significant voltage drop (10.3 vdc) on those red wires. They may be +/- wires for the gauge servos, that would explain the big drop. There are no big fat  wires going into the box, regardless of color.

I am going to search the Mallibu site for help, those guys have been through this same crap.

It's Keyser Medallion.

IF ANYONE DOES THIS WORK ON A VDRIVE, BE A SPORT AND TAKE A FEW PICS FOR THE SITE.  I will take pics if I rewire my epic22 DD this winter/spring. My season starts early so I will get crackin when the snow melts.

Pete

[toyotafreak]

Will do, Pete when I get my shizzle together. The alarms would be an especcially big drag if we were using Accuski - I think someone said the low voltage alarm will cause the Accuski to disengage.

[cyclone]

Not Perfect Pass ;

It would really piss me off if it turned off Accuski during a championship ski pass my third or fourth ball at 45 off turnin and burnin.  Crashin and burnin. A known defect in the system would be grounds for a personal injury lawsuit.

That could be a safety concern, seriously. I know what it's like when my wife slows down by 5mph when I'm about four feet in the air.  Can't sue Toyota for that!

[toyotafreak]

Pete dropped an s-bomb.

[cyclone]

I'm just sayin.... Could be bad for the guy who uses Accuski. Lots of people do for slalom skiing. They like it better than Perfect Pass. What if you were using it for Ski flying? It could have you flying out into the parking lot or something.

[toyotafreak]

Agree with ya, Pete.

[cyclone]

Well, I ran two new circuits to under the dash in my boat, 50 amps ea. One for my lights and other accessories from my deep cell, another circuit from my starting battery to supplement the 10 ga. wires that supply power to the dash and MMDC computer. Last year, I was getting low voltage readings under the dash, but not at the battery while the engine was running. I may also increase the size of the wires powering the MMDC computer, it is a pretty long run from the dash to the trunk on my D drive. Before I can do that, I need to know the pinout on the MMDC connectors, two connectors, one has about 6 ea. 22 ga. black and red wires. I'm not sure if the wires are power input or servo drive outputs to the gauges, I read about 10.8 volts back there at idle, it drops to less than ten at speed, causing the low voltage alarm. I found poke marks in one red, one black wire where the dealer was testing voltage one of the times that I had it in for this problem. I don't want to start butchering my factory harness until I know fer sher which wires are the right ones.

Anybody know which wires are the supply to this box? I have asked the dealer(Toyota  mechanic left, they're clueless now), and emailed Keyser Medallion and received no response. I asked the Malibu guys but nobody knows.

I had it at the dealer three times for this problem, they couldn't fix it. I know that a lot of other owners have mentioned this alarm. I wonder if it is only boats with the MMDC in the trunk instead of under the dash.  Anyone with this problem, please post with the model/year and the location of the MMDC (if you know)



 

[toyotafreak]

Pete, my MMDC is under the dash and the battery is under the stbd, aft seat.

Hey, don't you have the MMDC-fix document? Thought I got it from you, or gave it to you. Will check at work tomorrow if it's on the computer there.

[cyclone]

I don't have it.

[cyclone]

Revisited.

I have finally done something with the new circuit I ran to the dash. I paralleled the supply to the dash to the digital switchbox. Trouble is, now it bypasses the big boxl with the circuit breakers. This box is not in any of the Toyota docs. If the ignition is energized, then, the digital switchbox and ignition, etc get 12vdc. I ran a new 8 ga. pair to the dash, paralleled the run through the harness going through the circuit breaker box. Oh well, we'll see how the boat runs. I did find some problems with the dealer installed accessories. #1 was the keyless ignition that was grounded through the horn circuit. Horn shorted out, no more ignition. Dumbass. I removed at least 20ft of that crap this winter. I now have 2 good batts and a stable baseline for testing.

Pete

Pete

[Bitzco]

Yeah man, I know what you're talkin bout. I've been doin exactly the same stuff to my boat. I love workin with them positives and negatives in them wires and solders and stuff. Them grounders is fun too. Last week I installed my home stereo in the boat. The reel to reel looks sweet up on the dash and them 3 foot tall audiovox speakers with the tweeters in em look great tied to the little ring things on the platform. Do you think it will hurt the particle board boxes being in the water all the time like that? I doubt it. Audiovox makes stuff to last. I got them speakers at Kmart about 15 years ago and they ain't given me a lick o trouble never since. I'll be blowin the babes out o the water with them tweeters as soon as the ice thaws.