Saturday, February 8, 2020

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1457

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1457



The ECM detects more than 10 inch H2O vacuum for 5 s during a non-purge condition.



Action Taken When the DTC Sets



DTC P0496 is a Type B DTC.



Conditions for Clearing the MIL/DTC



DTC P0496 is a Type B DTC.



Reference Information



Schematic Reference



Engine Controls Schematics (LLT) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics



(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)



Connector End View Reference



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



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



Testing/Testing for Intermittent Conditions and Poor Connections)



* Troubleshooting with a Test Lamp (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Troubleshooting



with a Test Lamp)



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



DTC Type Reference



Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code



(DTC) Type Definitions)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information



Circuit/System Verification



1. Ignition ON, engine OFF, seal the EVAP system using the Purge/Seal function with a scan tool.



2. Start the engine.



3. Observe the FTP sensor with a scan tool. The Fuel Tank Pressure Sensor parameter should be less than 1.7 V after 90 s.



瀚慖f the Fuel Tank Pressure Sensor parameter is greater than the specified range, go to Circuit/System Testing.



4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed



from the Freeze Frame/Failure Records data.



Circuit/System Testing



1. Ignition ON, engine OFF.



2. Seal the EVAP system using the Purge/Seal function with a scan tool.



3. Start the engine.



4. Observe the FTP sensor with a scan tool. The Fuel Tank Pressure Sensor parameter should be less than 1.7 V after 90 s.



瀚慖f the Fuel Tank Pressure Sensor parameter is greater than the specified range, replace the Q12 EVAP canister purge solenoid valve.



Repair Instructions



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



Evaporative Emission Canister Purge Solenoid Valve Replacement (LF1) (See: Powertrain Management/Emission Control Systems/Evaporative



Emissions System/Canister Purge Solenoid/Service and Repair)Evaporative Emission Canister Purge Solenoid Valve Replacement (LLT) (See:



Powertrain Management/Emission Control Systems/Evaporative Emissions System/Canister Purge Solenoid/Service and Repair)



P0497



DTC P0455 or P0497 (w/LLT)



Diagnostic Instructions

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