Code 19 reads "RCM Crash Data, Memory Full", then refers to troubleshooting using Pinpoint Test C
Pinpoint Tests — Air Bag Supplemental Restraint System (SRS)
Pinpoint Test C: LFC 19/DTC B1231 — RCM Crash Data Memory Full
Normal Operation
WARNING:
The restraints control module (RCM) orientation is critical for proper system operation. If a vehicle equipped with an air bag supplemental restraint system (SRS) has been involved in a collision in which the center tunnel 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.
WARNING:
A new RCM must be installed if the air bag modules have deployed.
WARNING:
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.
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Pinpoint Tests — Air Bag Supplemental Restraint System (SRS)
PINPOINT TEST C: LFC 19/DTC B1231 — RCM CRASH DATA MEMORY FULL
C1: CHECK FOR A HARD OR INTERMITTENT DTC
C2: CHECK THE CONDITION OF THE RCM MOUNTING BRACKET
C3: CHECK FOR ADDITIONAL DTCS
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Pinpoint Tests — Air Bag Supplemental Restraint System (SRS)
PINPOINT TEST C: LFC 19/DTC B1231 — RCM CRASH DATA MEMORY FULL
C1 CHECK FOR A HARD OR INTERMITTENT DTC
1 Key OFF
2 Connect Scan Tool
3 Key ON (position II)
4 Retrieve/Clear Continuous DTCs
Retrieve and record any continuous DTCs for use later in this pinpoint test.
5 On-Demand Self Test
Was DTC B1231 retrieved during the on-demand self test?
Yes
This is a hard fault. The fault condition is still present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test. INSTALL a new driver air bag module and passenger air bag module. Go to «C2».
No
This is an intermittent fault. The fault condition is not present at this time. Go to «C3».
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Pinpoint Tests — Air Bag Supplemental Restraint System (SRS)
PINPOINT TEST C: LFC 19/DTC B1231 — RCM CRASH DATA MEMORY FULL
C2 CHECK THE CONDITION OF THE RCM MOUNTING BRACKET
1 Inspect the RCM mounting bracket for damage.
Is there any damage to the RCM mounting bracket?
Yes
RESTORE sheet metal to its original shape and structural integrity. INSTALL a new RCM and mounting bracket. Go to «C3».
No
INSTALL a new RCM. Go to «C3».
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Pinpoint Tests — Air Bag Supplemental Restraint System (SRS)
PINPOINT TEST C: LFC 19/DTC B1231 — RCM CRASH DATA MEMORY FULL
C3 CHECK FOR ADDITIONAL DTCS
1 Refer to the continuous DTCs recorded during Step C1.
Were any continuous DTCs retrieved during Step C1?
Yes
Do not clear any DTCs until all DTCs have been resolved. GO to the Restraints Control Module (RCM) Diagnostic Trouble Code (DTC) Priority Table in this section for pinpoint test direction.
No
CLEAR all DTCs.
__________________ AFM Site Administrator
2005 Mustang GT | 
