Controller Area Network
The Tire Pressure Monitoring System Control Module (TPMSCM) sends and receives a number of digital messages via the Controller Area Network (CAN) bus. The received messages are used to operate the Tire Pressure Monitoring System (TPMS). The transmitted messages comprise of TPMS status information and requests to the Instrument Cluster (IC) to illuminate warning indicators and/or display messages in the information and message center.
The TPMSCM transmits the messages shown in the following table:
| MESSAGE TYPE | RECEIVED BY |
|---|---|
| Tire Pressure Monitoring System (TPMS) diagnostic response | Jaguar Land Rover (JLR) approved diagnostic equipment |
| TPMS amber warning indicator request at 25% (or 20% depending on market) tire deflation | Instrument Cluster (IC) |
| TPMS message display request | IC |
| Current tire pressures and load setting | IC |
| Recommended tire pressures | IC |