Tire Pressure Monitor Receiver / Transponder: Description and Operation
TPMS RECEIVERDESCRIPTION
RECEIVER
1. Mode
1) Virgin State (No TPMS sensor id's learned)
- The receiver as a sole part is shipped in this state. Replacement parts should therefore arrive in this state.
- In this state, there is no sensor monitoring and no DTC monitoring.
- The state indicates that platform specific parameters must be written to the receiver and that sensors are un-learned.
- In unlearned state when connected in the vehicle with ignition key on the TPMS lamp will flash at one second intervals.
2) Normal State
- In order for tire inflation state and DTC monitoring to occur, the receiver must be in this state.
- In this state type 1, 2, or 3 sensor learning mode can be started.
2. Overview
- Receives RF data from sensor.
- Uses sensor data to decide whether to turn on TREAD Lamp.
- Uses sensor information, background noise levels, Auto-learn status, short circuit output status, vehicle battery level, internal receiver states to determine if there is a system or a vehicle fault.
- Activates LFI for TPMS sensor location.
OPERATION
1. Type 1 learn mode
- TPMS sensor learning via K-line diagnostic bus using TPMS Exciter.
2. Type 2 learn mode
- Learn via LFI wand
- Enter type 2 learn mode via K-line command.
- Trigger each TPMS sensor in the following order FL, FR, RL, RR with the LFI wand.
- Exit type II learn mode.
3. Type 3 learn mode (High line only)
- Enter type 3 learn mode via K-line command.
- Receiver triggers each LFI and programs TPMS sensors and received.