It should be simple to install aftermarket keyless in this car, since it
already has power locks.
Any failures caused by the installation or operation of the keyless system
won't be covered by your factory warranty, but that's either expired or
soon to expire on a 2000.
The keyless module will need power and ground and will need to tap into
the power lock system.
I have a Four door 2001 Elantra with similar door locks.
Just out of curiosity does the power lock only open all
the doors from the driver's door?
And the front passenger door lock just open only the passenger
On my old Mitsubish Galant opening either the front door locks
unlocked all the doors.
I haven't experimented with this to see, but from what I can make of the
If you have the factory keyless entry system, either front door will
lock/unlock all doors. This is especially unclear because the ETACS
module receives separate ground input from each front door when it's
locked, but receives a ground signal if any of the rear doors is locked.
If you don't have the factory keyless system, only the left front will
lock/unlock all doors.
I just tried one with keyless entry, and the doors lock/unlock if either is
From the looks of the schematic, it's impossible for models without
keyless entry to operate that way. For them, it would be driver's door
But on my 2000 Sonata, all the door locks are controlled in unison from
only the front passenger lock. In other words, unlocking the front
passenger door with the key or with the inside tab switch unlocks all
the doors on the car; the driver's door switch does not. This seemed odd
to me at first, but when I really thought this through, I realized that
this logic is brilliant. If you think real good, you'll get it also.
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