Supplemental Inflatable Restraint (SIR)

Wiring Diagram:

CIRCUIT DESCRIPTION
DTC 71 and/or DTC 75 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) "Driver 36VLR" 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 ("Turn-ON" test).

DTC WILL SET WHEN
Any of the indicated malfunctions are detected by the DERM. These conditions are tested at different times: 1) At "Turn-ON," 2) Asynchronously, 3) During "Continuous Monitoring," 4) At "Turn-ON."

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

DTC WILL CLEAR WHEN
The indicated malfunctions are not detected by the DERM.