B1053
SIR Schematics:
Inflatable Restraint IP Module:
Inflatable Restraint Sensing And Diagnostic Module:
Inflatable Restraint Steering Wheel Module Coil:
CIRCUIT DESCRIPTION
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. DTC B1053 will set instead of DTC B1051 when a deployment occurs while an inflator circuit malfunction is present that could possibly result in a non-deployment situation in one or both inflator modules.
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.
^ A deployment loop malfunction exists.
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 B1053 is a latched code which cannot be cleared. Replace the SDM after following the instructions in the diagnostic table.
DIAGNOSTIC AIDS
DTC B1053 will be accompanied by another DTC (other than DTC B1071). Repair the malfunction causing the other DTC(s) before installing a new SDM.
TEST DESCRIPTION
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 B1053 may have set falsely.
3. This step checks for signs of impact or collision. If there are no signs of impact or collision, DTC B1053 may have set falsely.