Theory Of Operation

Whenever a Key Fob is inserted in the Ignition Node Module (IGNM); or the Keyless Ignition Node (KIN) push button is pressed with the key inside the vehicle, the Radio Frequency Hub (RF-Hub) performs a self test and resynchronization routine. During the routine, the RF-Hub interrogates the Key Fob, performing various validity and performance tests. The repair of this fault condition relies on the programmed status of the Key Fob.