daveriley123

iTrader: (1)

I don't suppose anyone knows a way to regain access through the keypad to de-enable the immobiliser. I accidently put the code in 3 times as I was rushing in bad light today and got stranded for 2 hours waiting for recovery. I've been waiting over a month for a fresh key from the main dealer so I don't have a working key which makes the car unusable without taking it to them for them to overide it.

Vxr2010

there is a sequence that can be put in to override the alarm , does the normal route with the alarm fob for turning it off not work , i'm taking it is a classic with the sigma alarm pad , i called an alarm dealer and was told what to do i don't have any details of who i spoke to

daveriley123

iTrader: (1)

Not a classic it's an 04 blob sti with sigma alarm and no the the code no longer works as I stupidly entered wrong 3 times as it was dark and rushing so it's locked out.

Don Clark

From the Sigma manual...........

The keypad only allows three attempts to enter the correct PIN
code. If a third incorrect PIN code is entered the security system will ignore all PIN code entries for 30 minutes. This is a security feature.

daveriley123

iTrader: (1)

Thanks for the reply. I disconnected the battery to try and reset the alarm ecu to no avail. After reconnecting, the alarm sounds like a door has been left open. I have left the battery connected for a couple of hours but I still can't overide the immobiliser with the key pad.

Vxr2010

the key pads were known for failing and therefore inputting numbers did not work , don't you have the alarm fob ?

Beastie

iTrader: (2)

You have left the ignition on for 30 minutes and then tried keypad with ignition still on??

daveriley123

iTrader: (1)

No, the code needs to be entered without the ignition on as far as I am aware. I will try anything tho so if your recommending I do this I will certainly give it a try. Thanks

Don Clark

Keypad Use:
- The keypad allows only THREE PIN attempts and then will "Lock Up" if an incorrect number is entered a third time. This is a secuity feature to prevent random attempts at steeling the vehicle, however, it is also an inconvenience if you are suffering "Radio Lock Out" and enter your PIN incorrectly.

- 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 exceeds10 seconds, then the LED above the keypad will flash rapidly and the PIN attempt should be aborted 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.

daveriley123

iTrader: (1)

Thanks for all the reply''s men. I have finally managed to get the car started. I left the battery disconnected over night then connected it again and waited about an hour before entering the code again. Thanks again

daveriley123

iTrader: (1)

I am currently at the main dealer now my new key has finally arrived. They are now telling me that they can't programme the key as they can't access my Alcatek ecu. I was under the understanding that programming the key doesn't involve the ecu and it was on a totally different system. I have spoke to my mapper (Steve simpson) and he also says that the ecu doesn't have anything to do with the alarm/immobiliser. HELP.

Vxr2010

a keys info can be downloaded and put on another chip for another key it's just finding the right key specialist to do it , it cost me about 60£ and ecu was not involved i had it done on an 04 jdm sti

Don Clark

The OEM ECU has an immobiliser control module connected to it that links to a transponder chip in the key.

If you now have an Alcatek ECU, you would probably need to refit the oem unit to get the immobiliser and key paired. (unless it is now redundant)

Your Sigma alarm also has immobiliser circuits in it and you would need to program the new key and any others to it.

OEM Immobiliser wiring (Sigma alarm uses the same triggers)

supersai101

Not sure if you have fixed it by now or not but from my experience from changing my ECU. The factory setup has 3 units, the ECU, the transponder chip reader and the Sigma alarm. The chip reader is paired with the ECU. So, if you are changing the standard ECU for another standard ECU, you will need to change the chip reader too. This is what I had to do when changing my ECUTek locked ECU with a standard non mapped ECU.

The Sigma alarm seems to be a separate unit, and is controlled with the remote in the key and the keypad. When the alarm is armed, it acts like a kill switch, which is why if you unlock the car but leave it too long and try turning the key nothing happens until you press the button on the key again.

Not sure whats up with your key / remote / sigma alarm but if you have an aftermarket ECU, you probably won't be using the chip / chip reader part of the security system and is only using the sigma alarm. If this is the case and you want to replace the sigma alarm for whatever reason, you can just buy a second hand sigma alarm unit with matching alarm key fobs, open up your existing keys and put the replacement fobs in them and it should all work. I have a spare sigma alarm unit with 2 matching fobs for sale from a 2003 blob sti.

SmurfyBhoy

I planned to go down this route as my ecu is locked what did it cost and what did you have to replace ?

supersai101

I bought an ECU 'kit' from a breaker, came with ECU, Sigma alarm, chip reader and 2 keys and lock barrels. In reality though, you don't need half that stuff, you just need to replace the ECU (located in the passenger footwell), replace the chip reader (located under the steering wheel), take the chips out of the keys they give you and put the chips in your existing keys.

It should cost between £120 - £150 for all those items from a breaker depending on who you buy from.