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For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2005 🢒 GTO 🢒 Engine 🢒 Engine Controls - 6.0L 🢒 Inspection/Maintenance Evaporative Emission System Set

Description

This test satisfies the enable criteria necessary to execute inspection/maintenance (I/M) readiness diagnostics for the evaporative emission (EVAP) system. The test may be used to set the I/M system status indicators to YES. Service bay tests are included on the scan tool for some systems depending upon vehicle make and model. The test is designed to allow the EVAP diagnostic tests to run in service bay conditions. Ensure that the vehicle meets the requirements listed in Conditions for Running before performing either EVAP system test. Failure to meet the necessary requirements may produce inaccurate test results.

Conditions for Running

Scan Tool Service Bay Test Equipped Vehicles

    • Stored engine controller DTCs have been cleared.
    • The battery voltage is between 10-18 volts.
    • The engine coolant temperature (ECT) is less than 70°C (158°F) at start-up.
    • The fuel level is 15-85 percent.
    • The vehicle must be in Park or Neutral during the test.
    • The test can take up to 17 minutes to complete and set the I/M system status, depending on the fuel level and the fuel volatility.

Non Scan Tool Service Bay Test Equipped Vehicles

    • DTCs P0442, P0446, P0455, P0496 are not set.
    • The start-up intake air temperature (IAT) is between 4-30°C (39-86°F).
    • The ECT is less than 30°C (86°F).
    • The start-up IAT and ECT are within 8°C (15°F).
    • The barometric pressure (BARO) is more than 74 kPa.
    • The ambient air temperature is between 2-32°C (36-90°F).
    • The engine run time minimum is 10 minutes.
    • The trip drive length is more than 5 kilometers (3.1 miles).
    • The ECT is more than 70°C (158°F).
    • The fuel level is between 15-85 percent.
    • The above conditions must be met a minimum of three times for DTC P0442 System Small Leak Detected to report a pass.

Diagnostic Aids

Extreme high or low ambient temperatures may prevent the EVAP system tests from initiating. Performing an inspection prior to running the EVAP Service Bay Test may prevent having to repeat the test. A loose fuel cap may cause a Service Bay Test to abort or fail and prevent the I/M system status from updating. A failed or aborted test will require the vehicle to cool down in order to meet the enable criteria to run another test.

The I/M system status does not indicate whether the test has passed or failed, only that a decision was made. When all of the diagnostics for a specific system have run and passed, the I/M system status will update to YES. If a test for a specific system has failed, the I/M system status will update to YES, indicating a determination was made, even if all of the required tests have not run. When a failure occurs, the emission related DTC portion of the I/M system status display will indicate the malfunction indicator lamp (MIL) is requested. The I/M system status also registers the number of DTCs.

Step

Action

Yes

No

1

Did you perform the Inspection/Maintenance (I/M) System Check?

Go to Step 2

Go to Inspection/Maintenance (I/M) Complete System Set Procedure

2
  1. Select Special Functions with a scan tool.
  2. Determine if the vehicle is equipped with a Service Bay Test for the evaporative emission (EVAP) system.

Is the vehicle equipped with EVAP Service Bay Test?

Go to Step 3

Go to Step 5

3
  1. Verify that the vehicle is within the Conditions for Running.
  2. Turn OFF all of the accessories, such as the A/C, blower fan, etc.
  3. Following the directions on the scan tool, perform the EVAP Service Bay Test. Refer to Service Bay Test

Did the EVAP system pass the Service Bay Test?

Go to Step 8

Go to Step 4

4
  1. Observe the scan tool Service Bay Test for an indication of why the test did not pass, such as failed DTC, test aborted, etc.
  2. Refer to the appropriate service information for diagnosis and repair of the condition as necessary.

Did you complete the repair?

Go to Inspection/Maintenance (I/M) Complete System Set Procedure

--

5

Important: At least 3 drive cycles are required for the EVAP system status to update to YES. Repeat steps 1-5 until the minimum requirement of drive cycles have been met.

  1. Verify that the vehicle is within the Conditions for Running.
  2. Turn OFF all of the accessories, such as the A/C, blower fan, etc.

    3. Important: Once the engine is started, DO NOT turn the engine OFF for the remainder of the procedure until the test is complete.

  3. Start and idle the engine for 2 minutes.

    4. Caution: Road test a vehicle under safe conditions and while obeying all traffic laws. Do not attempt any maneuvers that could jeopardize vehicle control. Failure to adhere to these precautions could result in serious personal injury and vehicle damage.

    Important: In order for this test to run, the vehicle must operate within the following conditions:

  4. Acceleration at part throttle to 72 km/h (45 mph) with this speed maintained until the engine reaches operating temperature. This may be up to 8-10 minutes depending on the start-up coolant temperature.
  5. Continue the operating conditions for an additional 6 minutes after the engine reaches operating temperature, or until the inspection/maintenance (I/M) system status indicator updates to YES.

Did the EVAP system status update to YES?

Go to Step 8

Go to Step 6

6

Observe the DTC information with a scan tool.

Does the scan tool indicate any failed DTCs?

Go to Diagnostic Trouble Code (DTC) List - Vehicle

Go to Step 7

7
  1. Refer to Inspection/Maintenance (I/M) System DTC Table to determine which DTCs are required to run in order to complete this test.
  2. Observe the Not Ran Since Code Cleared display with a scan tool.
  3. Determine which of the DTCs required for a YES status has not run.
  4. Enter the DTC number in the Specific DTC menu of the scan tool.
  5. Operate the vehicle within the Conditions for Running the DTC.
  6. Repeat the procedure until the scan tool indicates that the diagnostic test has run.
  7. Repeat steps 4-6 for any additional required DTCs that have not run.
  8. Observe the I/M System Status display with a scan tool.

Did the EVAP System Status update to YES?

Go to Step 8

Go to Diagnostic Aids

8

Observe the emission related DTC portion of the I/M System Status display with a scan tool.

Does the scan tool indicate any emission related DTCs set?

Go to Diagnostic Trouble Code (DTC) List - Vehicle

System OK