Friday, January 15, 2021

2010 Cadillac CTS Sedan AWD V6-3.6L Page 411

2010 Cadillac CTS Sedan AWD V6-3.6L Page 411



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 B1580



- Mirror Horizontal Position Sensor Circuit



DTC B1590



- Mirror Vertical Position Sensor Circuit



Diagnostic Fault Information



Circuit/System Description



The driver door module (DDM) and passenger door module (PDM) determine the position of the outside rearview mirrors based on inputs from



two mirror position sensors, one for vertical position, the other for horizontal position. 5 V is applied to each sensor through a shared 5 V reference



circuit and a shared low reference circuit supplies ground. Each sensor has an individual signal circuit which is referenced from ground and



provides position voltage to the DDM/PDM.



Conditions for Running the DTC



Battery voltage must be between 9-16 V.



Conditions for Setting the DTC



B1580



An improper voltage level is seen on the horizontal position sensor signal circuit.



B1590



An improper voltage level is seen the vertical position sensor signal circuit.



Action Taken When the DTC Sets



Memory mirror recall functions are suspended as long as the fault is present.



Conditions for Clearing the DTC



* A current DTC will clear when the fault is no longer present.



* A history DTC will clear after 40 malfunction-free ignition cycles.



Reference Information



Schematic Reference



Outside Rearview Mirror Schematics (See: Body and Frame/Mirrors/Diagrams/Electrical Diagrams/Outside Rearview Mirror Schematics)



Connector End View Reference



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



Description and Operation



Outside Mirror Description and Operation (See: Body and Frame/Mirrors/Description and Operation/Outside Mirror Description and Operation)



Electrical Information Reference



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



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



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



Testing/Testing for Intermittent Conditions and Poor Connections)