Supplemental Inflatable Restraint (SIR)

CIRCUIT DESCRIPTION
Code 71 is an internal DERM fault and will set if any of the following conditions are detected:
- DERM power supply reserve voltage, charge or discharge time failure;
- DERM power supply reserve voltage out of range for 500 milliseconds;
- DERM is unable to read from or write to EEPROM;
- "36 VLR" is greater than a certain voltage for 500 milliseconds.

TEST CONDITIONS
Tested during "Turn-On" and every 100 milliseconds during "Continuous Monitoring."

FAILURE CONDITIONS
Code 71 is set when an internal DERM fault is detected during "Turn-On" or Continuous Monitoring."

ACTION TAKEN
DERM turns "On" the "Air Bag" telltale lamp.

CONDITIONS TO CLEAR
Current Code 71 will clear if no internal DERM faults are detected for 500 milliseconds.