Honda Odyssey Forum banner

1 - 13 of 13 Posts

·
Registered
Joined
·
16 Posts
Discussion Starter #1
Hi,

I am getting lots of false laser alerts using my new radar detector - Cobra 9930. Only happens when I accelerate while driving above 50 mph. Any idea what could cause this and how to fix?

Thanks,
Levon
 

·
Registered
Joined
·
16 Posts
Discussion Starter #2
Hi,

To update a little bit - I checked and all ground connections look OK. Also checked the batter connections and it is tight there as well.

I think it is caused by alternator. Just strange why it kicks in only during acceleration while driving above 50 mph.

I am planning to add a power filter to get rid of the issue but would really like to fix the cause, not cover it.

Please help if you have any information/experience with this.

Thanks,
Levon
 

·
Registered
Joined
·
3,163 Posts
Check your battery. The battery is used to filter noise from the electrical system. A weak battery will allow the noise level in the electrical system to increase and the weakest components show up first. Don't just look at it, have it tested and if it is over three years old or a Honda battery I would replace it. Replace with one of the highest CCA you can get as the Odyssey places a heavy load on the battery. Also if you make a lot of short trips the battery may not be getting charged.
 

·
Registered
Joined
·
16 Posts
Discussion Starter #4
Hi William,

The radar detector has voltage info. It shows 12.0-12.1v when engine is not running and 13.9-14.1 when it is running. The battery itself is only 1.5 years old (from AutoZone).

Do you think 12.1 is too low?

By the way, I installed PAC power noise filter (specifically for the alternator noise) but it did not help either.

Best Regards,
Levon
 

·
Registered
Joined
·
3,163 Posts
Just because the battery is only 1.5 years old doesn't make it good. By the same note I wouldn't trust the voltage readings on the detector. Use a good voltmeter. One thing I would try is connecting the detector to a portable battery and see if you still get false indications. The detector could be just picking up stray radiations.
 

·
Registered
Joined
·
16 Posts
Discussion Starter #6
Took the car to AutoZone. Battery is good. Next I will check the radar with portable battery - probably redundant since it does not give false alarm in my TSX.

And False alarms only happen during acceleration.

Regards, Levon
 

·
Registered
Joined
·
16 Posts
Discussion Starter #7
Is it possible that this could be caused by the alternator belt slippage?

Regards, Levon
 

·
Registered
Joined
·
295 Posts
levonpg,

A fully charged 12 volt automotive battery should read between 2.1 and 2.15 volts per cell. A 12 volt automotive battery has 6 cells so full voltage should be 12.6-12.9 volts. IF YOU ONLY read 12 to 12.1 volts then your battery is not fully charged. BUT when reading the battery voltage you need to know that the meter is calibrated (reading correctly). From your post you are only .5-.9 volts short of full charge, BUT from the running voltage it sounds like your system is putting out voltage. Still sound like you have a potential battery issue (in addition to others, lose drive belt, bad regulator in the alternator, etc....), see if you can get it checked with another meter (or two). Lots of luck, Russ.
 

·
Registered
Joined
·
16 Posts
Discussion Starter #9
Thanks Russ,

In the AutoZone with proper voltmeter it did show 12.88V (vs 12.1 on my rader detector). That was right after 20 mile drive. They said it is OK.

Best Regards,
Levon
 

·
Registered
Joined
·
16 Posts
Discussion Starter #10
I tested it with a portable battery and the problem is not there - it is definitely coming from the alternator.

Next I am planning to check the alternator belt.

Regards, Levon
 

·
Registered
Joined
·
16 Posts
Discussion Starter #12
I have a strange info related to this.

I was trying to see if the alternator belt is glazed and not. During that time pushed the alternator tensioner couple of times. No more alternator power noise.

Regards, Levon
 

·
Registered
Joined
·
755 Posts
Damn annoying heh?? I have a escort 8500 x50 blue model and it has those laser detection thingie on, and no matter how fast I cruise down, whenever I acclerate, the laser detection will go off. The best solution was to just turn the laser detection off. And luckily, my V1 doesn't do this in the ody like the escort :)
 
1 - 13 of 13 Posts
Top