DTCs Current and History

The RFA system stores DTCs as either current or history codes. DTCs for the TPM system are also accessed through the RFA system. Most RFA system malfunctions will set a DTC and display the SERVICE TIRE WARN SYS message on the IPC.

Other RFA malfunctions will only set a DTC and not display a fault message and must be read using a scan tool. History DTCs are intermittent malfunctions and be diagnosed different then current DTCs. Refer to Intermittents and Poor Connections in Diagrams.