2010 Cadillac CTS Sedan AWD V6-3.6L Page 148

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 148



SDM.



5. If all circuits test normal, test or replace the seat belt buckle assembly.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Driver or Passenger Seat Belt Buckle Replacement (See: Restraints and Safety Systems/Seat Belt Systems/Seat Belt Buckle/Service and



Repair/Driver or Passenger Seat Belt Buckle Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for SDM replacement, setup, and programming



B0074



DTC B0074



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B0074 00



- Passenger Occupant Classification Sensor



DTC B0074 0D



- Passenger Occupant Classification Sensor Circuit Resistance Above Threshold



DTC B0074 0E



- Passenger Occupant Classification Sensor Circuit Resistance Below Threshold



DTC B0074 0F



- Passenger Occupant Classification Sensor Circuit Erratic (Wet Seat)



Circuit/System Description



The passenger presence system (PPS) sensor continually monitors itself and if a fault in this circuit occurs, a DTC will set. When the sensing and



diagnostic module (SDM) detects this DTC within the PPS, it will notify the customer of the enable/disable status by illuminating the OFF indicator



on the PASSENGER AIR BAG ON/OFF indicators. Then the PPS will communicate to the SDM through serial data communications that a PPS



fault is present. The SDM will then disable the deployment of the instrument panel module and then illuminate the AIR BAG warning indicator.



Conditions for Running the DTC



Ignition voltage is between 9-16 V.



Conditions for Setting the DTC



* The SDM has received a fault message from the PPS module.



* The PPS detects a wet seat fault if DTC B0074 0F is set.



Action Taken When the DTC Sets



* The SDM disables the instrument panel module deployment loop.



* The SDM will illuminate the OFF portion of the PASSENGER AIR BAG ON/OFF indicator.



* The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.



Conditions for Clearing the DTC



* The condition for setting the DTC no longer exists.



* A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

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