2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1350
* Individual components can be isolated and tested using adapters in the J 41413-300 - Kit.
* A condition may exist where a leak in the evaporative emission system only exists under a vacuum condition. This type of leak may be
detected by using the scan tool Purge/Seal function to create a vacuum in the evaporative emission system and then observe the fuel tank
pressure parameter for vacuum decay.
Reference Information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Description and Operation
Evaporative Emission Control System Description (See: Powertrain Management/Computers and Control Systems/Description and
Operation/Evaporative Emission Control System Description)
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
* J 41413-200 - Evaporative Emissions System Tester (EEST)
* J 41413-300 - Evaporative Emissions Cap and Plug Kit
* J 41413-SPT - High Intensity White Light
* For equivalent regional tools, refer to Special Tools (See: Powertrain Management/Computers and Control Systems/Tools and Equipment).
Circuit/System Testing
Note:
* 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).
* Larger volume fuel tanks and/or those with lower fuel levels may require several minutes for the floating indicator to stabilize.
* Ensure that the underbody temperature of the vehicle and the tester are similar.
1. Disconnect the purge tube at the quick connector on the evaporative emission canister side of the Q12 evaporative emission canister purge
solenoid valve and install the CH 48096 - Port Tool.
2. Connect the J 41413-200 - EEST to the CH 48096 - Port Tool.
3. Using a scan tool close the evaporative emission canister vent solenoid valve to seal the evaporative emission system.
4. Use the flow meter on the J 41413-200 - EEST , calibrated to 0.51 mm (0.020 in) 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.
Repair Verification
1. Seal the evaporative emission system and use the flow meter on the J 41413-200 - EEST , calibrated to 0.51 mm (0.020 in) to determine that
there is no leak in the evaporative emission system.
2. Clear DTCs.
P0443
DTC P0443, P0458, or P0459 (LAU)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
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 P0443
- Evaporative Emission (EVAP) Purge Solenoid Control Circuit
