Pinpoint Test C: LFC 19/DTC B1231 — Crash Data Memory Full

Normal Operation

WARNING: THE AIR BAG ELECTRONIC CRASH SENSOR (ECS) 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 CENTER TUNNEL AREA HAS BEEN DAMAGED, INSPECT THE MOUNTING AND BRACKET FOR DEFORMATION. IF DAMAGED, THE ECS MUST BE REPLACED WHETHER OR NOT THE AIR BAGS HAVE DEPLOYED. IN ADDITION, MAKE SURE THE AREA OF THE ECS MOUNTING IS RESTORED TO ITS ORIGINAL CONDITION.

WARNING: CLEARING DTC B1231 WILL POTENTIALLY REMOVE ALL RECORDS OF THE CRASH EVENT.

When the air bags are deployed during a collision, the air bag electronic crash sensor (ECS) module 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 ECS.

Possible Cause

Crash data memory full is caused by:

a crash event which deployed the air bags.

PINPOINT TEST C: LFC 19/DTC B1231 — CRASH DATA MEMORY FULL

C1 CHECK FOR HARD OR INTERMITTENT DTC
Key off.
Connect NGS Tester.
Key to RUN.
Perform retrieve/clear continuous DTCs. Retrieve and record any continuous DTCs for use later in this pinpoint test.
Perform on-demand self test.
Was DTC B1231 retrieved during on-demand self test?
Yes No
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 . This is an intermittent fault. The fault condition is not present at this time. GO to C3 .

C2 CHECK CONDITION OF ECS MOUNTING BRACKET
Inspect ECS mounting bracket for damage.
Is there any damage to ECS mounting bracket?
Yes No
INSTALL a new ECS module. RESTORE the sheet metal to its original shape and structural integrity. GO to C3 . INSTALL a new ECS module. GO to C3 .

C3 CHECK FOR ADDITIONAL DTCs
Refer to continuous DTCs recorded during Step C1 .
Were any continuous DTCs retrieved during Step C1?
Yes No
Do not clear any DTCs until all DTCs have been resolved. GO to the Air Bag Electronic Crash Sensor (ECS) Module Diagnostic Trouble Code (DTC) Priority Table in this section for pinpoint test direction. REACTIVATE the system. CLEAR all