Supplemental Inflatable Restraint (SIR)

Electrical Diagram:

CIRCUIT DESCRIPTION
Code 71 is an internal DERM fault and will set if any of the following conditions are detected: 1) DERM power supply reserve voltage charge or discharge time failure; 2) DERM power supply reserve voltage less than 13.0 volts or greater than 19.6 volts for 500 milliseconds; 3) DERM is unable to read from or write to EEPROM; 4) "36VLR" is greater than 44.0 volts for 50 milliseconds.

TEST CONDITION(S)
Tested during "Turn-ON" and every 100 milliseconds during "Continuous Monitoring".

FAILURE CONDITION(S)
Code 71 is set when an internal DERM fault is detected during "Turn-ON" or "Continuous Monitoring".

ACTION TAKEN
DERM turns "ON" "INFL REST" warning lamp.

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