It sounds like you need to visit the dealer and have them re-program the
key to the car (hoping that it's not a fault in the car itself).

TSB 20/03 9662 Replacing The Key Remote Control Battery (dated 06-25-04)
describes how changing the battery "incorrectly" can cause the
processor to lock up and stop functioning. If this happens it instructs
you to:

1.4 Check the function of the remote control.

Note: If the remote control does not function after replacing the
battery, the processor could have stopped. If this is the case, the LED
of the remote control either does not light when the button is pressed
or it lights continuously, i.e., longer than length of time the button
is pressed. The processor must be restarted. In this case, proceed as is
described under Step 2.



2. Restarting the processor.

2.1 Remove battery as described under Step 1.2.

2.2 Inserting battery briefly with polarity reversed.

2.2.1 After a waiting time of at least 10 seconds, slide battery with
the polarity of the battery reversed (positive terminal downwards) under
the tab (Figure 1, arrow 2).

2.2.2 Clip battery downward into the holder.

2.2.3 After a waiting time of approx. 3 seconds, remove this incorrectly
polarized battery again.

2.3 Install battery as described under Step 1.3.

2.4 Check the function of the remote control.




Hope this work to solve it. It sounds like you need to visit the dealer and have them re-program the key to the car (hoping that it's not a fault in the car itself).

TSB 20/03 9662 Replacing The Key Remote Control Battery (dated 06-25-04) describes how changing the battery "incorrectly" can cause the processor to lock up and stop functioning. If this happens it instructs you to:

1.4 Check the function of the remote control.
Note: If the remote control does not function after replacing the battery, the processor could have stopped. If this is the case, the LED of the remote control either does not light when the button is pressed or it lights continuously, i.e., longer than length of time the button is pressed. The processor must be restarted. In this case, proceed as is described under Step 2.

2. Restarting the processor.
2.1 Remove battery as described under Step 1.2.
2.2 Inserting battery briefly with polarity reversed.
2.2.1 After a waiting time of at least 10 seconds, slide battery with the polarity of the battery reversed (positive terminal downwards) under the tab (Figure 1, arrow 2).
2.2.2 Clip battery downward into the holder.
2.2.3 After a waiting time of approx. 3 seconds, remove this incorrectly polarized battery again.
2.3 Install battery as described under Step 1.3.
2.4 Check the function of the remote control.


Hope this work to solve it.

The auto lock and unlock mechanism may be grounded thats why it wont start using the remote to unlock car. good luck! The auto lock and unlock mechanism may be grounded thats why it wont start using the remote to unlock car. good luck!