Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.

WARNING:

Refer to: Fuel and Evaporative Emission Pipe Warning

CAUTION:

Refer to: Clean, Dry, Low Pressure Gas Source Caution

Verify the following conditions do not exist:
- Q13 Evaporative Emission Vent Solenoid Valve - Blocked/Restricted/Visible Damage
- Evaporative Emission Canister - Blocked/Defective/Restricted/Visible Damage
- Evaporative Emission Canister Purge Hose - Blocked/Defective/Incorrect connection/Kinked/Restricted/Visible Damage
- Evaporative Emission Canister Vent Hose - Blocked/Defective/Incorrect connection/Kinked/Restricted/Visible Damage
- Evaporative Emission Canister Vent Pipe - Blocked/Defective/Incorrect connection/Kinked/Restricted/Visible Damage
- Evaporative Emission Vent Filter - Blocked/Dirty/Restricted/Visible Damage
- If a condition exists
  Repair or replace as necessary
- Go to next step: If no condition exists
Install any previously removed components.
Perform the following action:
- {Cap Type Fuel Fill} Remove - Fuel Tank Filler Cap
  Install - CH-41415-30 Fuel Tank Cap Adapter
- {Capless Type Fuel Fill} Install - GE-41415-60 Engine Induction System Leak Test Adapter/Capless Fuel Fill Adapter @ Door @ Fuel Tank Filler Pipe
Perform the following action:
- {Cap Type Fuel Fill} Install - GE-41413-A / B Evaporative Emissions System Tester (EEST) - Hose @ CH-41415-30 Fuel Tank Cap Adapter
- {Capless Type Fuel Fill} Install - GE-41413-A / B Evaporative Emissions System Tester (EEST) - Hose @ GE-41415-60 Engine Induction System Leak Test Adapter/Capless Fuel Fill Adapter
Ignition - On / Vehicle - In Service Mode

NOTE:

Before proceeding with this test, review the tool user manual for Safety Information and Instructions: GE-41413-A / B Evaporative Emissions System Tester (EEST)
The user manual that is supplied with the tool, is also available online, refer to: GM Special Service Tools
Make sure the underbody temperature of the vehicle and the tester temperature are similar.
Completely unwind the nitrogen/smoke hose from the bracket to optimize the tester's performance.

Perform the following action:
1. Select - Nitrogen @ GE-41413-A / B Evaporative Emissions System Tester (EEST)
2. Perform the scan tool function: EVAP Vent Solenoid Valve - Not Venting
3. Press and release the switch: Remote Switch @ GE-41413-A / B Evaporative Emissions System Tester (EEST) - Special Tool = On or Activated
  NOTE:
  Do NOT exceed the specified value or incorrect test results may occur.
  
  Use the tool to achieve a gauge reading of 9.3 mmHg (5.0 in H2O)
Perform the scan tool function: EVAP Vent Solenoid Valve - Venting
Verify the scan tool parameter: Fuel Tank Pressure Sensor = 0.0 mmHg (0.0 in. H2O)
- If not the specified value
1. Ignition/Vehicle - Off
2. Verify the following conditions do not exist:
  - Q13 Evaporative Emission Vent Solenoid Valve - Blocked/Restricted/Visible Damage
  - Evaporative Emission Canister - Blocked/Defective/Restricted/Visible Damage
  - Evaporative Emission Canister Purge Hose - Blocked/Defective/Incorrect connection/Kinked/Restricted/Visible Damage
  - Evaporative Emission Canister Vent Hose - Blocked/Defective/Incorrect connection/Kinked/Restricted/Visible Damage
  - Evaporative Emission Canister Vent Pipe - Blocked/Defective/Incorrect connection/Kinked/Restricted/Visible Damage
  - Evaporative Emission Vent Filter - Blocked/Dirty/Restricted/Visible Damage
  - If a condition exists - Repair or replace as necessary
  - Go to next step: If no condition exists
3. Replace the component: Q13 Evaporative Emission Vent Solenoid Valve
- Go to next step: If the specified value
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.
Verify the DTC does not set.
- If the DTC sets
  Repeat the procedure starting at step 1
- Go to next step: If the DTC does not set
All OK.