How to erase all remote control codes before programming new remote

[brandyf]

Here's the instructions I received from my dealership for my 1997 4Runner. Please keep in mind that this all must be done very fast and I would recommend you have someone that can tell you when the LED flashes so that you can concentrate on pressing the programming switch. This is a very frustrating process or at least it was for me and my husband. If this does not work for you - you are not doing it fast enough.
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Factory Supplied PIO/DIO Wireless Door Lock Remotes
1996-1999 Models (and 2000 Tundra)
RS3000

REMOTE CONTROL PROGRAMMING

To erase all REMOTE CONTROL codes from the system:

1) Insert the key into the ignition switch, and turn it to "ON".

2) Press and hold the ECU's PROGRAMMING SWITCH for 3 seconds.
The STATUS MONITOR LED turns on for 5 seconds.

- YOU MUST PERFORM THE NEXT STEP WITHIN 5 SECONDS -
(I believe that this next step must be performed within the 5
seconds on #2.)

3) Press and hold the ECU's PROGRAMMING SWITCH for over 2
seconds again. The STATUS MONITOR LED turns off, then flashes 3
times. The PIEZO "CHIRPER" chirps 3 times, and the exterior
(outside) lights flash 3 times.

4) Turn off the ignition. The ECU has cleared all REMOTE CONTROL
codes; until another REMOTE CONTROL is programmed, the system
will not work with any REMOTE CONTROL.

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