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Alarm code ???

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Hi guys

My RB5 won't start up at work :-(

It's got a standard Subaru Alarm on it.

It has a little pad in the car which requires a code to start it up.

It's been fine it's just done it today.

Where do I get the code from any ideas...??

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Hi mate,

Not gonna help much if you don't have tge book, but it's supposed to be in the alarm operating manual, I've heard that subaru dealers should have a record of the code too. Not to sure how true this is but may be worth giving your local dealer a bell

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you will need vin numbers etc, otherwise they wont give you time of day :) if its your alarm that wont deactivate, its in immobilisor phase, that means the fob is probably knackered, the exact same thing happened to me last year, and i didnt have the code either, a quick Battery swap and i was away, i have put a thread up in the help me section regarding changing the codes on the standard alarm.

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If you find that one or more of your Sigma M30 alarm remote controls

that came with your car are not working then you might need to reset or

reprogram them. This article assume that the alarm remotes are working

and they are the ones that came with the car/system. If this is the

case then you will need to follow the procedure below with both remotes:

Reprogramming Procedure

  1. Arm and then Disarm the system using the working Radio Key.
  2. Within 30 seconds of disarming, type into the keypad- *17856*91*2# where 2 is total number of radio keys to work the system
  3. 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.

  4. 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.


hope this helps.

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Hi guys thanks for the replies.

My car has started up.

Where I work they use a lot of satellite gps system loads of Ariel's all over the place.

A friend at work who also has a sub suffers from the same problem.

He was told drive away or don't park close to the aerials and it will be fine.

So I pushed it a bit away from the aerials & it started up fine.

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Yeah it's a common fault that with the overhead cables :( Just pre warn you, you shouldn't really push Scoobs same if you ever need to be towed all 4 wheels should be off the ground. I doubt you did any major damage but it soon damages the diffs if you do it too much. And you have a friend with one why is he not on here :D 

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  • 4 months later...

I have one if those keypads on the flap where my fuses are, in drivers knee roll, however I wasn't given any remotes with my car! Should I have fobs on a 2010 MY or is the system incorporated into my car key?

It`s a cat 1 system.......Should be on the actual key, they don`t use the key-fobs. If you don`t have your code (supposed to be in the alarm handbook) you can phone the nearest dealer with your VIN number and he should be able to give it to you.

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