Supplemental Inflatable Restraint (SIR)

CIRCUIT DESCRIPTION
When there is a vehicle accident of sufficient magnitude to set Code 51, the DERM stores accident information in the EEPROM (electrically erasable programmable read-only memory). Code 52 is set when the EEPROM has stored four simultaneously closed arming and discriminating sensor events (Code 51 settings).

TEST CONDITIONS
Tested every 100 milliseconds during "Continuous Monitoring."

FAILURE CONDITIONS
Code 52 will set when the EEPROM area reserved for accident data in the DERM is detected as full during "Continuous Monitoring."

ACTION TAKEN
"AIR BAG" telltale lamp is turned "On" during all future ignition cycles.

CONDITIONS TO CLEAR
This code cannot be cleared.