2010 Cadillac CTS Sedan AWD V6-3.6L Page 148

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.