Faulty GM5 module or key?

[healeyneil]

I just had my module repaired by an eBay guy - geeks garage. Posted it on the Monday, got it back on Friday. Still got a problem tho I’ll get my 2 1/2 year old key checked next

 

[Gollom122]

I just had my module repaired by an eBay guy - geeks garage. Posted it on the Monday, got it back on Friday. Still got a problem tho I’ll get my 2 1/2 year old key checked next

Bugger that’s what I am fearful of. I got a multimeter on my key today and checked each switch on the pcb. They all seem to work as they pass 3.4v through when activated but I still don’t know if they transmit. I might try my e90 key but don’t know if they even operate on the same system.

Did your refurbished unit come back with any report or was it an exchange. I’ve seen some that test and return if nothing was required.

Update - e90 key works on 868mhz so that’s a non starter to test

 

[05_3.0i_zoom]

New battery hasn’t solved the remote locking issue. Tried pairing again and nothing. Guess I need another key to test.

I had the same issue. Bought the ak-90 but haven't had time to do it

 

[healeyneil]

I just had my module repaired by an eBay guy - geeks garage. Posted it on the Monday, got it back on Friday. Still got a problem tho I’ll get my 2 1/2 year old key checked next

Bugger that’s what I am fearful of. I got a multimeter on my key today and checked each switch on the pcb. They all seem to work as they pass 3.4v through when activated but I still don’t know if they transmit. I might try my e90 key but don’t know if they even operate on the same system.

Did your refurbished unit come back with any report or was it an exchange. I’ve seen some that test and return if nothing was required.

Update - e90 key works on 868mhz so that’s a non starter to test

My unit came back, so it didn’t need to be coded to the car. Whether it was tested, I don’t know. I understand I paid to have relays replaced.

 

[Gollom122]

So your unit may have been fine. Do you have two keys? If both don’t work I’d suggest you consider the mirror next as this has the receiver inside. I’ve read that if your glass has leaked the goo out of the auto dimming element this can run onto the pcb. I spotted a second hand mirror on eBay so might give that a try.
If you beat me to it and end up with a mirror you don’t use and a fault that isn’t fixed I’ll buy it off you to try and fix mine!!

 

[Gollom122]

New battery hasn’t solved the remote locking issue. Tried pairing again and nothing. Guess I need another key to test.

I had the same issue. Bought the ak-90 but haven't had time to do it

I’d be interested in buying this from you when you’re done using it. The ak90 is more about reading the ignition transponder coil rather than the rf transmitter used to open the doors.

 

[Gollom122]

I’ve ordered the used e85 mirror off eBay £25 so will be trying that in a few days.
It might be in the for sale section if this doesn’t fix it.
Also ordered one of these £14.50 best offer accepted.

https://www.ebay.co.uk/itm/EWS-Remote-Key-Fob-3Button-433MHz-for-BMW-3-5-6-7-8-Series-M3-M5-X3-X5-1995-2005-/333891622545?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l6249&mkrid=710-127635-2958-0

From what I’ve read I don’t think it’s the gm5 module on my car because the central locking button inside the car works and the key also works in the lock.

 

[Sticks]

From what I’ve read I don’t think it’s the gm5 module on my car because the central locking button inside the car works and the key also works in the lock.

Sorry to say that mine still worked on the lock and one worked from the central locking button and the GM5 refurb fixed it.

 

[Gollom122]

Well I need a spare key anyway. And I should be able to sell the mirror for what I am paying for it. Allows me to rule out other components before I take the plunge shipping my gm5 module away for a week. I need wipers this time of year.

 

[Scooba_Steve]

Sorry to say that mine still worked on the lock and one worked from the central locking button and the GM5 refurb fixed it.

Was that just the relays or did they test and fix?
I might have the same issue, remote lock/unlock doesn't work, interior switch fine as is the unlock all round with the key in the door.

 

[Sticks]

Sorry to say that mine still worked on the lock and one worked from the central locking button and the GM5 refurb fixed it.

Was that just the relays or did they test and fix?
I might have the same issue, remote lock/unlock doesn't work, interior switch fine as is the unlock all round with the key in the door.

I gave it to an indy to take out and send off and I think the relays were changed. I suspect they tested it, I know they did when the ABS ECU failed.

 

[Gollom122]

I’ve just read an old thread where you said the module fixed your problem. But now the Indy fixed the problem which included the gm5 service.
Having one door not opening sounds like a door actuator so perhaps he just went belts and braces

 

[Sticks]

I’ve just read an old thread where you said the module fixed your problem. But now the Indy fixed the problem which included the gm5 service.
Having one door not opening sounds like a door actuator so perhaps he just went belts and braces

Not sure what you're getting at there. One door worked from central locking button, neither from remote. It went to the indy, GM5 (general module 5) sent off and refurbed, relays presumably, all good afterwards.

 

[Gollom122]

I am pleased to say I have a fix.
The rear view mirror I bought didn’t help as it was a bodged e90 that operates at 866mhz and the glass was all loose so that’s gone back. The replacement key however does open and close the doors so that’s great.
I have a set of rf earphones and can hear the signal of the buttons when held close to the keys.
My unlock button was not transmitting so it could not be paired to the car. And unfortunately trying to pair it to the car meant it got unpaired so in inadvertently stopped the lock and boot buttons functioning.
I am going to try and replace the button in my original fob otherwise I need to pair the transponder in the new key.

 

[Gollom122]

Replacing the button didn’t help. On detailed investigation I have a very small integrated chip which has a crack on one corner. I had previously checked the switches with a multimeter so was being a bit hopeful that replacing it would help. It didn’t.
I might see if I can replace the circuit board but keep the same transponder which looks like a chip and coil that makes up the circuit. I guess the coil induced the current to the chip. But before I do this I think I’d better get a second key made up.
Has anyone had success with the ak90?

 

[colb]

Some people have success with the AK90 when coding keys, my attempts using it failed to code my key, found it very hit and miss when trying to attach the cable to the processor on the pcb. Gave up in the end and got a mobile locksmith to code the new key I had, he connected to the eeprom chip on the pcb using pin outs and then a far more sofisticated key coding machine to read the chip and code the new key to the EWS module.

 

[buzyg]

Programming a New Key from Scratch

These instructions are for programming a new key when you do not have a working key fob.

Insert the key into the ignition and turn it to position 2 and back rapidly 5 times.

Remove the key

Hold the unlock button and press the BMW logo 3 times, then release the unlock button.

If you have additional keys you’d like to program at this time, repeat step 3 within 30 seconds from the original key programming.

Turn on the ignition to complete the process.

Great instructions. Both my keys had died one years ago one a few weeks back. Sent the spare that died years ago off to The Master Lock Smith, in London for a refurb. Arrived back this morning and followed their reset instructions. Did nothing. I then followed these instructions and now have two fully operational keys again.

 

[Sticks]

Sorry to say that mine still worked on the lock and one worked from the central locking button and the GM5 refurb fixed it.

Was that just the relays or did they test and fix?
I might have the same issue, remote lock/unlock doesn't work, interior switch fine as is the unlock all round with the key in the door.

I gave it to an indy to take care of and I've just checked the invoice. It just said they tested it and sent it off for repair.

It's worth bearing in mind, as has been said, if your car's battery is near the end of it's life (@7-8 years for me) then it could be the cause. It may not be, but if it's old, always change it before any other electrical components.

 

[Scooba_Steve]

It's worth bearing in mind, as has been said, if your car's battery is near the end of it's life (@7-8 years for me) then it could be the cause.

That has certainly been the issue in the past, battery dying was doing odd things.

I have a new battery so it isn't that, just remote lock/unlock slowly stopped working. I will try INPA to see if there is any way to see the signal and try to narrow it down that way if there is a menu.
Though to be honest I might just send the GM5 off anyway so I know it is done. Should have done the water pump last summer too while I was doing the oil cooler gaskets...