Supplemental Inflatable Restraint (SIR)

؆� Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION
DTC 71 is an indication of an internal DERM malfunction and will set if any of the following conditions are detected: 1) DERM energy reserve voltage discharge time failure for three consecutive ignition cycles ("Turn-ON" test), 2) DERM is unable to read from or write to EEPROM (tested during "EEPROM read/write cycle"), 3) Either "36 VLR" power supply voltage is above a specified value for 500 milliseconds ("Continuous Monitoring" test), 4) The DERM calculated number for the vehicle in which it is installed does not match the value stored in EEPROM.

TEST CONDITIONS
The failure conditions are tested at different times: 1) At "Turn-ON," 2) Asynchronously, 3) During "Continuous Monitoring," 4) At "Turn-ON."

FAILURE CONDITIONS
DTC 71 and/or DTC 75 will set when any of the indicated malfunctions are detected by the DERM.

ACTION TAKEN
DERM turns "ON" the "AIR BAG" warning lamp and sets a diagnostic trouble code.

CONDITIONS TO CLEAR
DTC 71 and/or DTC 75 will clear when the indicated malfunctions are not detected by the DERM.