Required options for the Crimestopper REVO are outlined in this guide : EVO-ALL & Crimestopper
C1 and D1 are found in the bypass options and not the remote starter options. Those options though are for vehicles that have Can-bus connections. The 1999 Avalon, has no Can-Bus connections, so changing those options won't do anything.
The EVO-ONE is two units in one. An EVO-ALL and a remote starter. That being said, there are two sections in this unit that you can access, the remote starter and the bypass. To access anything remote starter related, it should say Connection Mode : Remote Starter on the bottom right of the flash-link screen, to access anything bypass related, the flash-link needs to be set to Connection Mode : Bypass. To toggle between both connection modes, you need to hit the TOGGLE button while the EVO-ONE is disconnected.
The Bypass options are for anything that can be controlled through Can-Bus (which is not applicated on this vehicle since there is no can-bus connections to begin with).
The remote starter options are used mostly for convenience features and set up depending on the vehicle.
option 23 will reset the remote starter options.
To reset the bypass options, and also clear any previous programming done you need to follow this procedure:
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Hold down programming button
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Plug in power
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Let go of button when led is RED
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re-apply button and hold it down until all three LEDs start to alternate.
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once they start to alternate again, the bypass side is reset