2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1371

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1371

Engine Controls Schematics (LAU) (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/Connector End Views By Name)

Description and Operation

Evaporative Emission Control System Description (See: Powertrain Management/Computers and Control Systems/Description and

Operation/Evaporative Emission Control System Description)

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

Special Tools

* CH 48096 - Evaporative Emissions Service Access Port Tool

* CH 41415-50 - Fuel Tank Adapter

* J 41413-200 - Evaporative Emissions System Tester (EEST)

* J 41413-300 - Evaporative Emissions Cap and Plug Kit

* J 41413-311 - Evaporative Emissions Plug

* J 41413-SPT - High Intensity White Light

* J 41413-VLV - Evaporative Emissions Service Port Vent Tool

* For equivalent regional tools, refer to Special Tools (See: Powertrain Management/Computers and Control Systems/Tools and Equipment).

Circuit/System Testing

Note:

* Larger volume fuel tanks and/or those with lower fuel levels may require several minutes for the floating indicator to stabilize.

* Refer to the J 41413-200 - EEST operation manual for detailed instructions in Evaporative Emission System Diagnosis (See: Powertrain

Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Evaporative Emission

System Diagnosis).

1. Disconnect the purge tube at the quick connector on the evaporative emission canister side of the Q12 evaporative emission canister purge

solenoid valve. Install the CH 48096 - Service Access

Port Tool between the disconnected purge tube and the purge solenoid valve. Connect the J 41413-200 - EEST to the service access port tool.

2. Use a scan tool to seal the evaporative emission system.

3. Use the flow meter on the J 41413-200 - EEST , calibrated to 0.51 millimeter (0.020 inch) to determine that there is no leak in the

evaporative emission system.

瀚慖f a leak is detected, use the J 41413-200 - EEST to apply smoke to the evaporative emission system at the purge tube until the leak is

located using the J 41413-SPT - White Light.

4. To test for a restriction, connect the J 41413-200 - EEST nitrogen/smoke hose to the to the J 41413-311 - Evaporative

Emission Plug brass cone adapter. Disconnect the hose at the fuel cap end of the CH 41415-50 - Adapter. Connect the J 41413-311 - Evaporative

Emission Plug to the disconnected hose on the GH 41415-50 - Adapter. Install the CH 41415-50 - Adapter filler neck end only to the vehicle.

5. Allow the engine to idle.

6. Use the Purge/Seal function to seal the system with a scan tool.

7. Command the EVAP Purge Solenoid Valve to 30 percent.

8. The vacuum/pressure gauge on the J 41413-200 - EEST and the fuel tank pressure parameter on the scan tool should both show vacuum.

瀚慖f the vacuum/pressure gauge shows vacuum, but the fuel tank pressure parameter does not show vacuum, replace the fuel tank pressure

sensor.

瀚慖f neither the fuel tank pressure parameter nor the vacuum/pressure gauge shows vacuum, repair the restriction in the purge path.

9. Verify that the vacuum increases to the abort limit on the scan tool or more than 3.2 V, and the values are similar between the scan tool and

the vacuum/pressure gauge on the J 41413-200 - EEST.

瀚慖f the values are not similar, or the voltage did not reach 3.2 V, replace the B150 fuel tank pressure 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 (LAU) (See: Powertrain Management/Emission Control Systems/Evaporative Emissions System/Canister Purge