Remote Function Actuation (RFA) System

Diagnosis on the RFA system is done by reading DTC stored in the receiver's memory. RFA DTCs can only be displayed through the Instrument Panel Cluster (IPC) display (on-board diagnostic capabilities), or by using a scan tool. Most all information in this section will refer to the scan tool for diagnostic support. Refer to Scan Tool Diagnostics. The RFA system and Tire Pressure Monitor (TPM) system both rely on the same receiver, therefore TPM DTCs will be displayed in addition to RFA DTCs. Scan Tool Testing and Procedures

The RFA system uses information from other systems in order to execute some functions. Therefore, before further diagnosis, review the general information on how the RFA system operates and how each system interacts with the RFA system. Refer to Remote Keyless Entry System Description. This will save diagnostic time, future misdiagnosis, and unnecessary parts replacement. Description and Operation

Use a scan tool in order to diagnose the RFA system when referred to in diagnostic procedures. In addition to displaying DTCs, the RFA system displays the input status and the data values used. Any of these features can be selected using the scan tool.

Become very familiar with the RFA system capabilities and diagnostic features. These self-diagnostic features are referenced in the DTC tables and are very useful in diagnosing non-DTC setting malfunctions as well.

Replace the receiver only if the diagnostic procedures specifically direct you to do so. Check for wiring problems first. Then check the system for further problems. Most system malfunctions are traceable to faulty wiring and connectors, and occasionally components. The receiver is very reliable and not the likely cause of a system malfunction. Receiver replacement before a complete diagnosis will usually result in a recurrence of the original complaint malfunction.