Tire Pressure Module: Description and Operation

TPMS RECEIVER

DESCRIPTION

RECEIVER

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, short circuit output status, vehicle battery level, internal receiver states to determine if there is a system or a vehicle fault.

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.