Wednesday, April 21, 2021

2010 Cadillac CTS Sedan AWD V6-3.6L Page 80

2010 Cadillac CTS Sedan AWD V6-3.6L Page 80



Circuit/System Description



During a frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the



deployment loop in order to deploy the steering wheel module. The SDM performs continuous diagnostic tests on the deployment loops to check



for proper circuit continuity and for shorts to ground or voltage.



There are 2 shorting bars used within the steering wheel module coil connector which will short together both steering wheel module stage 1 high



circuit and steering wheel module stage 1 low circuit and both steering wheel module stage 2 high circuit and steering wheel module stage 2 low



circuit when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing.



Conditions for Running the DTC



Ignition voltage is between 9-16 volts.



Conditions for Setting the DTC



B0012 01 Stage 1 or B0013 01 Stage 2



The steering wheel module high and/or low circuit is shorted to voltage for 120 milliseconds.



B0012 02 Stage 1 or B0013 02 Stage 2



The steering wheel module high and/or low circuit is shorted to ground for 120 milliseconds.



B0012 04 Stage 1 or B0013 04 Stage 2



The steering wheel module high and/or low circuit is open for 120 milliseconds.



B0012 0D Stage 1 or B0013 0D Stage 2



The steering wheel module deployment loop resistance is greater than 5.1 ohms for 120 milliseconds.



B0012 0E Stage 1 or B0013 0E Stage 2



The steering wheel module deployment loop resistance is less than 1.3 ohms for 120 milliseconds.



Action Taken When the DTC Sets



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



* The SIR system is disabled and no deployments are allowed.



* The SDM will store a DTC, however if an event occurs the system will still attempt deployments.



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.



Reference Information



Schematic Reference



SIR Schematics (See: Diagrams/Electrical Diagrams/Air Bag Systems)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views)



Description and Operation



SIR System Description and Operation (See: Restraints and Safety Systems/Air Bag Systems/Description and Operation/SIR System Description



and Operation)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

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