Hi All, I got an used 2010 Prius IV last year and I like it very much. The previous owner all documents and receipts from dealer since day one. Now the mystery comes. There is a unknown button under left side of steering wheel which I cannot figure out what is the use/purpose of it. I have the picture attached. Does anyone has any idea of what is this button for? It is not a on/off button. It is a press/release button. I just contact the previous owner today and she said she has no idea either. Do you have the same button in your car and know what is this button for? Thanks in advance.
Some dealers put the KARR system on early gen 3's to protect theft off the lot. It has a few more bells and whistles than the OEM alarm: Motion detection with "warn away", shatter sensors for glass breakage, rolling codes and valet mode. Here's a writeup on how it works: (If it ain't broke, don't fix it!) Re-programming KARR alarm Make sure Karr is disarmed (no LED lights) Turn Prius on Press and release Karr button 3 times Short LED light with 1 short horn Before 3 seconds, turn Prius off Horn will give a short-long chirp Within 3 seconds, turn Prius back on (now in programming mode) Horn will give a long-short chirp Press Karr button one time per option (there are 4 options) the Karr LED will flash the number of times per option you are on. Option 1 (one flash): wait ½ second and horn should chirp once (auto-lock with ignition on) Option 2 (two flashes): wait ½ second and horn should chirp once (auto unlock with ignition off) Option 3 (three flashes): wait ½ second and horn should chirp twice (passive arming and lock without lock) Option 4 (four flashes): wait ½ second and horn should chirp twice (active arming) Turn Prius off to exit programming. Get out and arm…LED should flash. Wait a bit and then attempt to disarm with fob. Valet mode – car on, press and hold for 5 seconds until solid blue LED Valet mode off – within 3 seconds of Prius on, press and hold until LED off
