Normal Operation - Restraints Control Module (RCM)

The RCM receives a configuration data message from the BCM when the RCM proves out during the very first ignition cycle after it is installed. During prove-out at the beginning of each subsequent ignition cycle, the BCM sends configuration data to the RCM and the RCM compares the message to the message that was received during the very first ignition cycle.

• DTC U2300:55 (Central Configuration: Not Configured) - This DTC is present in every new RCM. Once the new RCM is installed and it successfully receives a configuration data message from the BCM, this DTC reports as a Continuous Memory Diagnostic Trouble Code (CMDTC). If the RCM reports this DTC on-demand, it means that the configuration data message has not been received from the BCM.
• DTC U2300:64 (Central Configuration: Signal Plausibility Failure) - If the RCM receives a configuration data message that does not match the configuration data that was previously received and stored, it sets this DTC. This DTC can set on-demand during the RCM prove-out, but change to a CMDTC later on in the ignition cycle if the correct message is eventually received. If Programmable Module Installation (PMI) has not been carried out for the BCM, this DTC sets.

This pinpoint test is intended to diagnose the following: 

• BCM
• RCM