Test C: LFC 19/DTC B1321 - RCM Crash Data Memory Full

C1 - C3:

Normal Operation

WARNING:
^ THE RESTRAINTS CONTROL MODULE (RCM) ORIENTATION IS CRITICAL FOR CORRECT SYSTEM OPERATION. IF A VEHICLE EQUIPPED WITH AN AIR BAG SUPPLEMENTAL RESTRAINT SYSTEM (SRS) HAS BEEN INVOLVED IN A COLLISION IN WHICH THE RIGHT COWL A-PILLAR AREA HAS BEEN DAMAGED, INSPECT THE MOUNTING AND BRACKET FOR DEFORMATION. IF DAMAGED, THE RCM MUST BE REPLACED WHETHER OR NOT THE AIR BAGS HAVE DEPLOYED. IN ADDITION, MAKE SURE THE AREA OF THE RCM MOUNTING IS RESTORED TO ITS ORIGINAL CONDITION.
^ A NEW RCM MUST BE INSTALLED IF THE AIR BAG MODULES HAVE DEPLOYED.
^ CLEARING DTC B1231 WILL POTENTIALLY REMOVE ALL RECORD OF THE CRASH EVENT.

When the air bags are deployed during a collision, the Restraints Control Module (RCM) will flash a Lamp Fault Code (LFC) 19 on the air bag indicator and store a Diagnostic Trouble Code (DTC) B1231 in memory. The LFC 19 and DTC B1231 indicate that a crash has been recorded by the RCM.

Possible Causes
Crash data memory full is caused by a crash event that deployed the air bags.