Apparatus and process for monitoring a vehicle condition

A process for monitoring a vehicle condition comprising:

• sensing a vehicle condition;
• transmitting signals indicative of the sensed vehicle condition, the transmitted signals including a first signal set and a second signal set;
• and
• receiving the transmitted signals, the transmitted signals being received by a receiver having an inactive state and an active state;
• the first signal set including a wake-up portion to wake up the receiver when the receiver is in its inactive state and an information portion, the second signal set including an information portion free of a wake-up portion,
• the signal sets being transmitted in a repeated predetermined pattern during a predetermined time period independent of vehicle movement and vehicle ignition ON and OFF state.

A process for remotely monitoring tire pressure in a vehicle having at least one tire, the process comprising:

• (a) sensing tire pressure in said at least one tire;
• (b) wirelessly transmitting a first tire pressure signal set representative of the sensed tire pressure;
• (c) wirelessly transmitting a second tire pressure signal set having a wake-up signal;
• and
• (d) receiving the first tire pressure signal set and the second tire pressure signal set having the wake-up signal using a receiver having at least an inactive state, the wake-up signal ensuring receipt of the first and second tire pressure signal sets when the receiver is in the inactive state by waking up the receiver,
• the first tire pressure signal set and the second tire pressure signal set being transmitted in a repeated pattern of signal sets during a predetermined time period independent of vehicle movement and vehicle ignition ON and OFF state.