Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2009IMPALA V6-3.5LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONMONITORS, TRIPS, DRIVE CYCLES AND READINESS CODESSERVICE BAY TEST
2009 Chevrolet Impala V6-3.5L
Service Bay Test
2009 Chevrolet Impala V6-3.5LSECTION Service Bay Test
Service Bay Test
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 pass or will indicate a specific DTC 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 ignition is ON.
* The battery voltage is between 9-18 volts.
* The engine coolant temperature (ECT) is less than 70°C (158°F).
* The fuel level is 15-85 percent of capacity.
* The vehicle speed is less than 4.8 km/h (3 mph).
* Stored DTCs have been cleared.
Test Procedure
1. Install a scan tool.
2. With a scan tool, select the service bay test in the special functions menu.
3. Follow the instructions on the scan tool.
4. Check DTCs with a scan tool.
5. Continue with the published service manual diagnostic DTC procedure.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.