9J1–54
RESTRAINT CONTROL SYSTEM
DTC 71 Internal SDM Fault
D09RX002
Circuit Description:
Diagnostic Trouble Code (DTC) 71 is an indication of a
potential internal Sensing and Diagnostic Module
(SDM) malfunction and will set if any of the following
conditions are detected:
1) Deployment or microprocessor energy reserve
failure.
2) Electronically Erasable Programmable Read Only
Memory failure. (EEPROM).
3) Random Only Memory failure. (ROM).
4) Random Access Memory failure. (RAM).
5) Calibration check sum failure.
6) Deployment switch faults.
7) Accelerometer fault.
8) Arming sensor fault.
9) Diagnostic current faults.
10) DTC 19
11) DTC 25
12) DTC 51
13) DTC 53
DTC Will Set When:
Any of the above indicated malfunctions are detected by
the SDM. The malfunctions described above are
tested mainly during “Continuous Monitoring" and some
ones run each ignition cycle.
Action Taken:
SDM turns “ON" the “AIR BAG" warning lamp and sets
a diagnostic trouble code.
DTC Will Clear When:
A scan tool “Clear Codes" commanded is received by
the SDM. Some of the indicated malfunctions will only
allow the “AIR BAG" warning lamp to go out.
But when DTC 19, 25, 51, 53 are also set, SDM is
Replaced.
SECTION