R055

CIRCUIT DESCRIPTION
During the "Initiator Assembly Resistance Test" the DERM grounds the "Passenger Side Low" terminal "B7" and measures the voltage at "Driver Source Sense" terminal "A5", "Passenger Source Sense" terminal "A6" and "Driver Side Low" terminal "B8". The DERM monitors "Driver Source Sense" to ensure that "Driver 36 VLR" is fully charged and supplying voltage to the high side of the driver deployment loop. If this condition is met in addition to the measurement at "Passenger Source Sense" indicating no voltage is being supplied to the high side of the passenger deployment loop and grounding "Passenger Side Low" does not ground "Driver Side Low", a driver only DERM has been installed and DTC RO55 is set.

DTC WILL SET WHEN
A driver only DERM has been installed in the vehicle as indicated by the conditions described above. This test is run once each ignition cycle during the "Initiator Assembly Resistance Test" when: 1) No "higher priority faults" are detected during "Turn-ON," 2) No "higher priority faults" are detected during "Continuous Monitoring" for one second, 3) No "Crank" signal present, 4) "Ignition 1" voltage is above a specified value.

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

DTC WILL CLEAR WHEN
The ignition switch is turned "OFF."