Firebird V8-350 5.7L VIN P SFI (1996)
displayed, the entire list is repeated beginning with DTC 12. System faults are stored as "Current", or "History" DTCs. A "Current" DTC means that the
fault was present when the Diagnostic Mode was entered. A "History" DTC means the fault occurred sometime after the BCM was installed in the
vehicle (or since the last time the DTCs were cleared), but may not currently be present. If a "Current" DTC is stored, the associated "History" DTC will
always be stored. When working on systems controlled by the BCM, the technician should always refer to this Section and check for DTCs.
DTC 12 - Diagnostic System Check
Circuit Description
Voltage is applied at all times from POWER ACCY Fuse 7 and circuit 640 to the "SECURITY" Indicator lamp on the instrument Cluster. With the
Ignition Switch in the "BULB TEST" or "RUN" position, ground is applied by the BCM through circuit 728 to the "SECURITY" indicator lamp. The
"SECURITY" indicator lamp illuminates for approximately 5 seconds to verify circuit operation. The BCM also utilizes the "SECURITY" indicator
lamp to display DTC flash codes (as described earlier in this Section) by grounding circuit 728.
DTC Will Set When
