I also have key knob and button. Got it checked from Peshawar (name of guy is Mohsin). He says that original system has been bypassed and a Chinese key system has been installed. Knob has also been permanently unlocked. I think owner; few years back, faced some issue and instead of getting it done rightly.. Did a jugarrd. Moreover, a remote starter was also installed which may be created some issue. Will try to get it resolved. Let's see.
This control module is Chinese...I think.