Normal Operation - Restraints Control Module (RCM)

The Restraints Control Module (RCM) continuously monitors the input voltage for correct operation. If the RCM  detects input voltage below 9 volts, it will store DTC B1318 in memory. If the RCM  detects input voltage of 20 volts, it will store DTC B1317 in memory. If the RCM  sets DTC B1317 or B1318, it will send a message to the Instrument Cluster (IC) module to illuminate the air bag warning indicator.