System Testing: CALIFORNIA
- Check condition of all hoses and tubes. Ensure coolant temperature is below 43°F (6°C). Start engine and ensure a bubbling noise is not heard from Electronic Air Control Valve (EACV).
- Warm engine until coolant temperature is between 64-109°F (18-43°C). Maintain engine speed at 1390 RPM and check that a bubbling noise is heard from EACV.
- Continue to run engine until coolant temperature is above 131°F (55°C). Maintain engine speed at 1390 RPM and check that a bubbling noise is intermittently heard from EACV.
- Allow engine to return to idle and check that a bubbling noise is heard from EACV. With coolant temperature above 64°F (18°C) and engine under heavy load, disconnect vacuum hose from vacuum switch and plug end of hose. Ensure a bubbling noise is not heard from EACV.
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