Thursday, February 13, 2020

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1430

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1430



9. Install the fuel fill cap.



10. Connect the J 41413-200 nitrogen/smoke supply hose to the EVAP service port of the CH-48096 .



11. Command the EVAP vent solenoid closed with a scan tool.



12. Use the remote switch to introduce smoke into the EVAP system.



Note: The fuel tank may need to be lowered to improve visibility of some of the EVAP system components.



13. Verify that smoke is not exiting the entire EVAP system with the J 41413-SPT .



瀚慖f smoke is observed, repair the condition as necessary.



14. Verify the individual EVAP system components for a leak using the J 41413-300 .



瀚慖f a condition is found replace the affected component.



Blockage/Restriction Testing



1. Connect the GE-41415-50 to the fuel tank filler neck. Connect the J 41413-200 to the GE-41415-50 .



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



3. Pressurize the EVAP system with nitrogen to 9.33 mm/Hg 5 in H20. Compare the scan tool Fuel Tank Pressure Sensor parameter to the J



41413-200 pressure/vacuum gauge. The FTP sensor parameter should be within 1.86 mm/Hg (1 in H2O) of the pressure/vacuum gauge.



瀚慖f not within the specified range, replace the FTP sensor.



4. Increase the EVAP purge solenoid to 100 %. The FTP sensor pressure should drop to less than 1.86 mm/Hg (1 in H2O).



瀚慖f greater than the specified value, disconnect the EVAP pipes listed below one at a time while observing the scan tool FTP sensor



parameter. If the FTP sensor parameter drops to less than the specified value when a pipe is disconnected, test for a blockage or



restriction in one of the following EVAP pipe/hoses:



1. EVAP purge vacuum source from the EVAP purge solenoid



2. EVAP purge pipe from the EVAP purge solenoid



3. EVAP purge pipe at the EVAP canister



4. EVAP vapor pipe at the EVAP canister



5. If you cannot locate a condition with the EVAP system, refer to Diagnostic Aids for additional information.



Component Testing



1. Seal the EVAP system with the scan tool EVAP Purge/Seal function.



2. Pressurize the EVAP system to 9.33 mm/Hg (5 in H20).



3. Compare the scan tool Fuel Tank Pressure sensor parameter to the J 41413-200 pressure/vacuum gauge. The scan tool FTP sensor



parameter should be within 1.86 mm/Hg (1 in H20) of the pressure/vacuum gauge.



4. Command the EVAP vent valve open with a scan tool. The scan tool Fuel Tank Pressure parameter should be approximately 0 mm/Hg (0 in



H20).



瀚慖f not within the specified range, replace the FTP sensor.



Repair Instructions



* Fuel Tank Pressure Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Fuel Tank Pressure Sensor/Service



and Repair)



* 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)



* Evaporative Emission Canister Vent Solenoid Valve Replacement (See: Powertrain Management/Emission Control Systems/Evaporative



Emissions System/Evaporative Emission Control Canister/Canister Vent Valve/Service and Repair)



* Evaporative Emission Line Replacement - Chassis to Canister (See: Powertrain Management/Emission Control Systems/Evaporative



Emissions System/Evaporative Emissions Hose/Service and Repair)



* Evaporative Emission Canister Replacement (See: Powertrain Management/Emission Control Systems/Evaporative Emissions



System/Evaporative Emission Control Canister/Service and Repair)



Repair Verification



1. Turn the nitrogen/smoke valve to nitrogen.



2. Command the EVAP vent valve closed with a scan tool.



3. Use the remote switch to activate the J 41413-200 .



4. Use the remote switch to introduce nitrogen and fill the EVAP system until the floating indicator stabilizes.



5. Verify the flow meter's stable floating indicator position is at or below the red flag.



6. Remove the CH-48096 , and connect the purge line to the EVAP purge solenoid.

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