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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 730 (Engine Controls And Fuel - 2.0L - Introduction (2 Of 2)) >> Description and Operation >> Turbocharger System Description >> Electronic Vacuum Pump

Electronic Vacuum Pump

WARNING: This page is about a different car, the 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

The purpose of the electronic vacuum pump on rear wheel drive platforms is to keep the vacuum in the brake booster at an acceptable level under various operating conditions. The ECM monitors the input signal from the brake booster pressure sensor. When the vacuum in the brake booster is not in an acceptable range the ECM will command the relay ON that controls the vacuum pump.

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