B1000

CIRCUIT DESCRIPTION
When the ignition switch is turned On and during vehicle operation, the Sensing and Diagnostic Module (SDM) performs tests to detect system faults. While the SDM is performing tests to detect system system faults, tests are also performed on internal components of the SDM. When an internal SDM fault is detected this DTC is set.

DTC TEST CONDITIONS
DTC B1000 can be set when the SDM malfunctions. The following conditions must be met to set this DTC:
^ Ignition voltage is present at the SDM and continuous.
^ The SDM has detected an internal fault or an air bag deployment has been commanded.
^ Fault needs to only be present for less than half a second.

ACTION TAKEN
^ When this fault is detected a current DTC will be set.
^ The air bag light will be turned On.

DIAGNOSTIC AIDS
Always start diagnosis of SIR DTCs with an inspection of vehicle, including its wiring and SIR components for visible damage.

Always replace SDMs with DTC B1000 set, only after all collision repairs have been completed.

Always perform the "SIR Diagnostic System Check" procedure before using this chart. Diagnostic System Check

CAUTION: BE CAREFUL WHEN YOU HANDLE A SENSING AND DIAGNOSTIC MODULE (SDM). DO NOT STRIKE OR JOLT THE SDM. BEFORE APPLYING POWER TO THE SDM:
^ REMOVE ANY DIRT, GREASE, ETC. FROM THE MOUNTING SURFACE.
^ POSITION THE SDM HORIZONTALLY ON THE MOUNTING SURFACE.
^ POINT THE ARROW ON THE SDM TOWARD THE FRONT OF THE VEHICLE.
^ TIGHTEN ALL OF THE SDM FASTENERS AND SDM BRACKET FASTENERS TO THE SPECIFIED TORQUE VALUE.
FAILURE TO FOLLOW THE CORRECT PROCEDURES COULD CAUSE AIR BAG DEPLOYMENT, PERSONAL INJURY, OR UNNECESSARY SIR SYSTEM REPAIRS.


NOTICE: Perform "SIR DIAGNOSTIC SYSTEM CHECK" before proceeding with this chart.

NOTE: Air bag telltale will remain On after the same DTC appears twice and is stored in memory as a history code. If the air bag telltale is On, the DTC can be a current or history code.