Remote fob battery

[The300]

Hi all,

 

I'm sure this has been asked before but I could not find it in a search on the forum so here goes. I have a WRX 300 2005 and want to change the key fob Battery, does this need to be done by a dealer or can I do it. I've been told it may lose the coding if it's not done by a dealer so I don't want to take the risk. Also does anyone now how I can either reset the key pad alarm or find out what the code is?

 

Cheers

[Jay762]

You can change the Battery yourself but will probably need to programme it to your alarm - now I know we have a thread covering this process somewhere on the forum - is your alarm the sigma M30?

 

this is for the M30

 

Reprogramming Procedure

Arm and then Disarm the system using the working Radio Key.

1. Within 30 seconds of disarming, type into the keypad- *17856*91*2# where 2 is total number of radio keys to work the system
2. Briefly press both radio keys in turn (the dash board LED will
   flash each time and the siren will bleep) Any radio keys not programmed
   here will no-longer operate the system.
3. You should now be able to arm and disarm the system using all the radio keys programmed.

When using the keypad always observe the following points:

• The PIN number should not be entered
  too quickly or too slowly - when a digit has been pressed the small LED
  built into the keypad will illuminate briefly as confirmation and only
  then should the next digit be entered.
• If an incorrect digit is pressed or the delay between entering
  digits exceeds 10 seconds, then the LED above the keypad will flash
  rapidly and the PIN attempt should be abborted and started again after
  30 seconds.
• Due to the small size of the keypad some users may find a
  rubber tipped pencil easier to use. DO NOT use the sharp tip of a ball
  point pen etc, or press excessively hard on the keypad as this will only
  damage the membrane and cause a digit to remain pressed, causing a
  continual incorrect PIN.
• The keypad allows only THREE PIN attempts and then will “Lock
  Up” if an incorrect number is entered a third time. This is a security
  feature to prevent random PIN attempts disarming the system.

If the remote(s) still don’t work then there are 3 possible reasons:

1. The remote Battery is flat (the built
   in LED takes very little current to illuminate it and is not an
   indication that the Battery voltage is healthy).
2. The remote is damaged or faulty.
3. It’s the wrong type of remote for the M30. There have been a
   number of Sigma remotes over the years that operate on different radio
   frequencies and use different encryption methods. The correct remote for
   the M30 is the AC38. This remote is easy to identify as it has a round
   Battery “pod” on the rear of the remote with a screw-off cover.

[The300]

Hi Jay762,

 

I thought mine was the M30 but not sure after reading your reply, this is a picture of my key fob. I think I might try and get the keypad number first as if I get the key programming wrong I'm thinking I'll have no way to start the car which wouldn't be funny! Thanks for your detailed reply anyway. :)

[Jay762]

think the M30 has the separate fob - but I may be wrong - good idea to sort the keypad code out though  :D 

[The300]

Thanks for your help anyway, I'll pop around to the local dealer to see if they have any idea.

[majik_thighs]

Hi Jay762,

 

I thought mine was the M30 but not sure after reading your reply, this is a picture of my key fob. I think I might try and get the keypad number first as if I get the key programming wrong I'm thinking I'll have no way to start the car which wouldn't be funny! Thanks for your detailed reply anyway. :)

That`s like mine on the 05 Outback, now i`m not absolutely positive but I think that`s just a change of Battery and nothing else. don`t buy it from a dealer, find the Battery code........pennies on eBay

[The300]

Final update then - I spoke to a very helpful parts person at Normandy Garage who got my alarm keypad code from Subaru and informed me that I could change my key fob Battery without having to get the fob reprogrammed. So I changed one Battery at a time  so I could test the theory and all good. 

[ourmark]

Just a quick thread revival to say that CR1620 is the Battery fitted in that remote.