Description
The evaporative emission (EVAP) Service Bay Test raises the engine coolant
temperature (ECT) threshold so that the temperature sensitive EVAP diagnosis
tests can run while in service environments. When the EVAP tests are run
the service bay test will indicate a passed or will indicate a specific diagnostic
trouble code (DTC) code has failed. The EVAP Service Bay Test can be used
to verify an existing condition and verify that the EVAP system is OK after
a repair is completed.
Conditions for Running the Test
Important: The following conditions must be met in order to enable the Service
Bay Test.
| • | The battery voltage is between 9-18 volts. |
| • | The ECT is less than 70°C (158°F). |
| • | The fuel level is 15-85 percent of capacity. |
| • | The vehicle speed is less than 3.2 km/h (3 mph). |
| • | Stored DTCs have been cleared. |
Test Procedure
- Install a scan tool.
- With a scan tool, select the service bay test in the special functions
menu.
- Follow the instructions on the scan tool.
- Continue with the published service manual diagnostic DTC procedure.
