Question about 2003 Mitsubishi Diamante

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My 2003 Mitsubishi Diamante has started to lock itself once I unlock it. Even with the key and not the remote there are times when I can't get the door open quick enough before the car locks itself again.

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No, but I have the same problem with my 2001 Diamante. Does anyone have a solution?

Posted on Jul 22, 2010

  • Paintbl1 Feb 02, 2011

    I'm having the opposite problems. I sometimes can't get mine to unlock at all! Plus the alarm has gone mad and will go off three of four times in a row.

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I have a 2003 Hyundai sante fe that will not start and I believe it may be related to the security system. This has happened twice, but the first time I got the car to start after clicking lock/unlock


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Not specific you the Lancer... but the typical method of synching the remote to the vehicle is to hold down the lock and unlock button for a period of 5-8 seconds. The car will beep once... the remote is synched.

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2001 mitsubishi diamante doors automaticaly lock after unlocking


So, it is the ford NO escape? Start by pulling all of the door lock switches, one at a time.

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The battery in my key fob for my 2004 Mitsubishi Diamante went flat. How do I reset it now that I have replaced the battery?


1-insert and remove key from ignition two times

2-close and open driver door two times

3-insert and remove key once from ign.

4-close and open drvr door twice

5-insert key into ign.,then close driver door

6-turn key to on (not start) then off, twice this is rewrite mode,have all remotes to reprogram it will clear any lost remotes.

7-remove key from ignition,the door locks should cycle twice.if not start over.it may take a few tries.

8-press lock/unlock together and hold for a second

9-release,and press lock on remote,the door locks will cycle confirming program.continue to do other remotes you have,steps 8 and 9.if only one in possession,you are done. To end mode open door or insert key into ignition.

You'll need to follow the steps with no more than a 1-2 second delay between each step.. hope it works

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1 Answer

Need the steps to programme the remote


Remote Programming Instructions

1. Driver's door OPEN and unlocked, all other doors closed and locked.

2. Insert YOUR key in ignition, DO NOT TURN, remove key.

3. Using the MANUAL lock/unlock button ON THE DRIVERS DOOR, slowly press lock and unlock 5 times (count the lock 5 times and unlock 5 times).

4. Shut door.

5. Open door.

6. Using the lock/unlock button ON THE DRIVERS DOOR, slowly press lock and unlock 5 times (count the lock 5 times and unlock 5 times).

7. With the door open insert your key into the ignition, turn to on position (DON'T START), wait 5 seconds. Turn off and remove key.

8. Locks should cycle once (Car will lock and then unlock once). If they don't cycle or they cycle more than once, do steps 1-7 over.

9. Now using the remote, push lock button, hold for one second,
release. The locks should cycle once. If not, start over and go slower.

10. Close the door. Open the door. Press the lock button on the remote. The locks should cycle. Close the door. Press the lock button on the remote, the doors should lock. Press again and the doors should unlock.

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1 Answer

The alarm wont go off not even when we start the car


You probably need to put the key in the drivers side door and turn it like you were unlocking the car. The remote unlock will not work for this.

Apr 16, 2009 | 2001 Mitsubishi Diamante

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