| TUCSON(LM) >2011 > G 2.4 DOHC > Suspension System > Tire Pressure Monitoring System > TPMS Receiver>Description and Operation |

Description
1. | Mode
(1) | Virgin State
A. | The receiver as a sole part is shipped in this state. Replacement parts should therefore arrive in this state.
B. | In this state, there is no sensor monitoring and no DTC monitoring.
C. | The state indicates that platform specific parameters must be written to the receiver and that sensors are un-learned.
(2) | Normal State
A. | In order for tire inflation state and DTC monitoring to occur, the receiver must be in this state.
B. | In this state, automatic sensor learning is enabled.
(3) | Test State
A. | This state is only used in manufacturing plant to check RF transmission between sensor and receiver.
2. | Overview
A. | Receives RF data from sensor.
B. | Uses sensor data to decide whether to turn on TREAD Lamp.
C. | Learn TPM sensor for under inflation monitoring automatically.
D. | Uses sensor information, distance travelled, background noise levels, Auto-learn status, short / open circuit output status, vehicle battery level, internal receiver states to determine if there is a system or a vehicle fault.
Operation
1. | General Function
A. | Auto-learn takes place only once per Ignition cycle.
B. | On successful completion, 4 road wheel sensor ID's are latched into memory for monitoring.
C. | Until Auto-learn completes, previously learned sensors are monitored for under inflation / leak warnings.
2. | General Conditions to Learn New Sensors:
A. | Receiver must determine that it is confident that sensor is not temporary:
1) | Uses vehicle speed.
2) | Uses confidence reduction of previously learned sensors.
B. | Typical time at driving continuously over 12.4 mph(20 kph) to learn a new sensor is up to 20 minutes.
3. | General Conditions to Un-Learn a sensor that is removed:
A. | It takes less than 20 minutes at 12.4 ~ 18.6 mph(20 ~ 30kph).
B. | Confidence reduction is dependent on time which vehicle is driven at speed greater than or equal to 12.4 mph(20 kph).