All doors should probably be closed for EKA, simply because it requires the vehicle to be in a locked state. Any open doors will result in Mislock, and prevent you from being in the initial status.
The EKA rumours are exactly that . . . i.e. rumours. If the microswitches are bad, then the only option is to connect the lock wires in the correct sequence. This will be difficult to achieve, so best to replace the lock or microswitches.
Also the Sync Mate only does the BECM-Engine ECU sync. It's no use for anything else, so sort the EKA first, before you purchase something you might not require.
Exact EKA procedure is in RAVE ETM (electrical trouble shooting), Central Locking section.. . .
BTW, always use "Unlock & Lock" instead of Left & Right procedure. This is what causes confusion between right & left hand drive cars.
NOTE: All handsets must be resynchronised when the vehicle’s battery has been disconnected.
A handset may be resynchronised by performing a key lock, or unlock, on either front door within 30 seconds of performing a remote lock, superlock, or unlock function. The BeCM uses the change of state of the CDL Switch to initiate resynchronisation.
Emergency Key Access (EKA)
EKA is used to disarm the theft alarm and mobilise the vehicle in the event of a handset failure. This is possible through a series of locks and unlocks with the key in the driver’s door lock cylinder. With the vehicle locked and the alarm armed, turn the key the required number of times according to the following sequence:
1. To enter the first digit, turn the key the required number of times to the unlock position.
2. To enter the second digit, turn the key the required number of times to the lock position.
3. To enter the third digit, turn the key the required number of times to the unlock position.
4. To enter the fourth digit, turn the key the required number of times to the lock position.
5. Turn the key to the unlock position to unlock the doors, disarm the alarm, and mobilise the vehicle.
NOTE: The key must be fully turned to the rest and lock/unlock position each time. After 3 wrong attempts, you must wait 10 minutes for the Keycode Lockout to disappear. Alternatively open the drivers door after 2nd attempt, and start again.