2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2083

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2083

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

Connector End View Reference

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

Description and Operation

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

Operation/Evaporative Emission Control System Description)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

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

Procedures/Connector Repairs/Connector Repairs)

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

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/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

Special Tools

* CH-48096 EVAP Service Access Port Tool

* GE-41415-50 Fuel Tank Cap Adapter

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

* J 41413-300 EVAP Cap and Plug Kit

* J 41413-311 EVAP Plug

* J 41413-SPT High Intensity White Light

* J 41413-VLV EVAP Service Port Vent Fitting

Circuit/System Testing

Important:

* 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 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 EVAP canister side of the purge solenoid valve and install the CH-48096 service

port adapter tool. Connect the J 41413-200 to the vehicle EVAP service port adapter.

2. Use a scan tool to seal the EVAP system.

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

瀚慖f a leak is detected, use the J 41413-200 to apply smoke to the EVAP system at the service port or the purge tube until the leak is located

using the J 41413-SPT.

4. To test for a restriction in the purge path, connect the J 41413-200 nitrogen/smoke hose to the J 41413-311 brass cone adapter. Disconnect

the hose at the fuel cap end of theGE-41415-50. Connect the J 41413-311 to the disconnected hose on the GE-41415-50. Install the

GE-41415-50 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 canister purge solenoid valve to 30 percent.

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

瀚慖f the vacuum/pressure gauge shows vacuum, but the FTP parameter does not show vacuum, replace the FTP sensor.

瀚慖f neither the FTP parameter nor the vacuum/pressure gauge shows vacuum, repair the restriction in the purge path. Refer to Evaporative

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

Operation/Evaporative Emission Control System Description).

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

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