2001 Honda Odyssey - Programming Keyless Entry Remote Fob

Thanks to 98CoupeV6.  Modified slightly by what worked for me.

DISCLAIMER
If you do this wrong, NONE of your keyless entry fobs will work!  Perform at your own risk!!

^ The system accepts up to three transmitters. The transmitter codes are stored in a stacking-type memory. If a fourth transmitter code is programmed, the code for the first transmitter is erased.

^ Entering the programming mode cancels all learned transmitter codes, so none of the previously programmed transmitters will work. You must reprogram all of the transmitters once you are in the programming mode.

You must complete steps 1-6 within 4 seconds of the previous step to keep the system from exiting the programming mode.

1. Turn the ignition switch to ON (II).


2. Press the "Lock" button on one of the transmitters. (An unprogrammed transmitter can be used.)


3. Turn the ignition switch to LOCK (0) [Key all the way in the OFF position].


4. Repeat steps 1, 2, and 3 two more times using the same transmitter used in step 2.


5. Turn the ignition switch to ON (II).


6. Press the "Lock" button on the same transmitter. Make sure the power door locks cycle to confirm that the system is in programming mode.  (I think the lights on the dash dim and come back on).


7. Don't mistake what happens in step 6 as registering a transmitter, you've only entered programming mode.  Wait a second, and press "Lock" again on the same transmitter pressed in step 6.  This registers that transmitter.  The door locks will sound (again) and the lights on the dash will blink once (again).


8. Within 10 seconds, press the "Lock" button on the other transmitter(s). Again, door locks will sound and lights in the dash will blink to confirm the registration of each transmitter.


9. Turn the ignition switch to LOCK (0) to exit the programming mode. 


10. Confirm that transmitters work.