B0051

CIRCUIT DESCRIPTION

SIR Schematics:

The inflatable restraint Sensing And Diagnostic Module (SDM) contains a sensing device (accelerometer) that converts vehicle velocity changes into an electrical signal. The SDM compares this electrical signal to a value stored in memory. When the generated signal exceeds the stored value, the SDM performs additional signal processing and compares the generated signals to values stored in memory. When two of the generated signals exceed the stored values, the SDM will cause current to flow through the inflator modules, deploying the air bags, and causing DTC B0051 to set.

CONDITIONS FOR RUNNING THE DTC
Ignition 1 Voltage is within the normal operating voltage range.

CONDITIONS FOR SETTING THE DTC
The SDM detects a frontal crash, up to 30 degrees off the centerline of the vehicle, of sufficient force to warrant deployment of the frontal air bags.

ACTION TAKEN WHEN THE DTC SETS
^ The SDM commands the AIR BAG indicator ON.
^ The SDM records crash data.

CONDITIONS FOR CLEARING THE DTC
DTC B0051 is a latched code which cannot be cleared. Replace the SDM after following the instructions in the diagnostic table.

TEST DESCRIPTION

Steps 1-6:

The number(s) below refer to the step number(s) on the diagnostic table:
2. This step checks for evidence of inflator module deployment. If no evidence of inflator module deployment exists, DTC B0051 may have set falsely.
3. This step checks for signs of impact or collision. If there are no signs of impact or collision, DTC B0051 may have set falsely.