Poor range with FOB
#1
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Poor range with FOB
Hello,
search neither google didnt give me a answer so here i am.
I got a very very poor range with the key fob, i need to stand next to front door to let the fob lock or unlock.
I bought a new FOB so that cant be a problem neither does the battery does.
Cant find anything about the electric about the fob how its receiver etc.
Any advice?
Thank you
search neither google didnt give me a answer so here i am.
I got a very very poor range with the key fob, i need to stand next to front door to let the fob lock or unlock.
I bought a new FOB so that cant be a problem neither does the battery does.
Cant find anything about the electric about the fob how its receiver etc.
Any advice?
Thank you
#2
Evolving Member
As first step check the battery, even if the fob is new it could have been sitting around for years with the battery already in, a new battery could solve your issue.
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#8
Evolving Member
Yesterday evening I disassembled my fob ot have look inside, I could not find a wire sticking out form the cirtuit board acting as antenna.
You have the issue wiht both of your fobs?
If not then the problem on your non-correctlly working fob is probably on the cirtuit board itself, not an easy task to find and fix.
If you have the issue with both fobs then the problem is somewhere else on the Evo itself, in the "receiving" part.
You have the issue wiht both of your fobs?
If not then the problem on your non-correctlly working fob is probably on the cirtuit board itself, not an easy task to find and fix.
If you have the issue with both fobs then the problem is somewhere else on the Evo itself, in the "receiving" part.
#9
Evolving Member
Yesterday evening I disassembled my fob ot have look inside, I could not find a wire sticking out form the cirtuit board acting as antenna.
You have the issue wiht both of your fobs?
If not then the problem on your non-correctlly working fob is probably on the cirtuit board itself, not an easy task to find and fix.
If you have the issue with both fobs then the problem is somewhere else on the Evo itself, in the "receiving" part.
You have the issue wiht both of your fobs?
If not then the problem on your non-correctlly working fob is probably on the cirtuit board itself, not an easy task to find and fix.
If you have the issue with both fobs then the problem is somewhere else on the Evo itself, in the "receiving" part.
It's odd that you get poor range, yet it still works at close range and it's not a battery issue. Is the battery fully making contact with the ground strap when you close the case? Check the antenna(and the rest of the PCB) for any breaks or weird-looking solder joints.
Edit:
So I took apart mine as it's been a while since I've messed with one, and I was wrong about the antenna, I actually don't see one anywhere on the board. Maybe someone with more knowledge knows, but I can't tell due to the dual-layer PCB. Either way, repairing any damaged components will be next to impossible and definitely not worth the time considering you can pick one of these up from Mitsu for $100. Or used for much much less.
Last edited by Fox_IX; Jan 25, 2019 at 11:26 PM.
#10
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Car came with just 1 key/fob and that one was working maybe 1 out of 15 times so that one was broken.
Ordered a new one on ebay, even replaced battery just to be sure.
Dont know if its just my fob or the receiver since i cant check with any other fob..
When looking at board from fob cant see anything weird.
Where is the PCB located?
Ordered a new one on ebay, even replaced battery just to be sure.
Dont know if its just my fob or the receiver since i cant check with any other fob..
When looking at board from fob cant see anything weird.
Where is the PCB located?
#12
Evolving Member
I'll test my FOB with my RF stick and see what frequency we're putting out.
In response to your previous question the PCB basically takes up 100% of the space within the plastic in the key fob. You can access it by removing the one phillips screw on the back of the remote.
Given that it's been a month since the last time I checked this thread, have you made any progress? As far as I'm aware you need two working fobs to be able to program a new one. I could be wrong on that one though, just remember reading it somewhere....
#13
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Ah i tough PCB was the receiver inside the car.
No i already checked the pcb on faulty connections etc, nothing to see.
can post some pictures if you want but dont think its something on the fob side, more somewhere where the signal gets received inside the car
No i already checked the pcb on faulty connections etc, nothing to see.
can post some pictures if you want but dont think its something on the fob side, more somewhere where the signal gets received inside the car
#14
Evolving Member
The keyless system is part of the ETACS-ECU on our cars. Both the antenna and receiver are integrated into it. The FSM doesn't have a ton of useful information about the inner-workings of the ETACS, but perhaps you can try swapping the unit to see if your issue is resolved. You'll have to relearn all of the codes for the FOBs if you do swap it.
Unfortunately any advanced diagnostic of the ETACS requires a MUT3 tool, which I'm guessing you do not have available to you, but at the very least you can check the connections and make sure it has good continuity to ground, etc.
Last edited by Fox_IX; Feb 18, 2019 at 06:00 PM.