Circuit/System Verification

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 .

Ignition - On/Vehicle - In Service Mode
Verify DTC P0446, P0451-P0454, P0496, P0498, P1467, P146D, P146E, P146F is not set.
- If any of the DTCs are set
  Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If none of the DTCs are set
Verify the following scan tool parameters are within the specified range:
- EVAP Purge Pump Pressure Sensor = 1.1 to 1.4 V
- Fuel Tank Pressure Sensor = 1.3 to 1.7 V
- If both scan tool parameters are not within the specified range
1. Ignition/Vehicle - Off
2. Verify the condition does not exist with the component and repair as necessary:
  1. Evaporative Emission Vent Filter or Evaporative Emission Canister Air Inlet Hose - Blocked/Dirty/Ice/Restricted/Visible Damage
  2. Evaporative Emission Canister - Blocked/Ice/Restricted/Visible Damage
  3. Evaporative Emission Canister Vent Hose or Pipe - Blocked/Kinked/Restricted/Visible Damage
  4. Q13 Evaporative Emission Vent Solenoid Valve - Blocked/Restricted/Visible Damage
  5. Evaporative Emission Canister Purge Hose - Blocked/Kinked/Restricted/Visible Damage
- If only the following scan tool parameter is not within the specified range: EVAP Purge Pump Pressure Sensor
1. Ignition/Vehicle - Off
2. Disconnect the component: Evaporative Emission Pipe - Canister- Side @ G58 Evaporative Emission Purge Pump
3. Ignition - On/Vehicle - In Service Mode
4. Verify the scan tool parameter: Filtered EVAP Purge Pump Pressure Sensor = 1.1 to 1.4 V
  - If not between 1.1 and 1.4 V - Replace the component: G58 Evaporative Emission Purge Pump
  - If between 1.1 and 1.4 V - Repair the restriction between the following components: G58 Evaporative Emission Purge Pump & B150 Fuel Tank Pressure Sensor
- Go to next step: If both scan tool parameters are within the specified range
Engine - Idling
Perform the scan tool control function: EVAP Purge Solenoid Valve with EVAP Purge Pump - 0% - For 10 s
Verify the scan tool parameter: Filtered EVAP Purge Pump Pressure Sensor = Greater than 5 kPa (0.72 PSI) @ Sea Level
- If 5 kPa (0.72 PSI) or less
  Test or replace the component: G58 Evaporative Emission Purge Pump
- Go to next step: If greater than 5 kPa (0.72 PSI)

NOTE:

Observe the Evaporative Emission Canister Purge Valve Command duty cycle in the Freeze Frame/Failure Records data. If the duty cycle is greater than 50%, command that value in testing.

Perform the scan tool control function: EVAP Purge Solenoid Valve with EVAP Purge Pump - 50% - For 60 s
Verify the scan tool parameter: Filtered EVAP Purge Pump Pressure Sensor = Greater than 4 kPa (0.58 PSI) @ Sea Level
- If 4 kPa (0.58 PSI) or less
1. Ignition/Vehicle - Off
2. Verify the condition does not exist with the component and repair as necessary:
  1. Evaporative Emission Vent Filter or Evaporative Emission Canister Air Inlet Hose - Blocked/Dirty/Ice/Restricted/Visible Damage
  2. Evaporative Emission Canister - Blocked/Restricted/Visible Damage
  3. Evaporative Emission Canister Vent Hose or Pipe - Blocked/Kinked/Restricted/Visible Damage
  4. Q13 Evaporative Emission Vent Solenoid Valve - Blocked/Restricted/Visible Damage
  5. Evaporative Emission Canister Purge Hose - Blocked/Kinked/Restricted/Visible Damage
- Go to next step: If greater than 4 kPa (0.58 PSI)
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 2
- Go to next step: If the DTC does not set
All OK.