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Home >> Chevrolet >> 2011 >> Traverse LS, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls And Fuel - 3.6L - DTC P0351 Through DTC P2636 And Troubleshooting >> Diagnostic Information and Procedures >> DTC P2635 (Fuel Pump Control Module) >> Circuit/System Description

Circuit/System Description

The engine control module (ECM) supplies voltage to the fuel pump flow control module when the ECM detects that the ignition is on. The voltage from the ECM to the fuel pump control module remains active for 2 seconds, unless the engine is in crank or run. While this voltage is being received, the fuel pump control module closes the ground switch of the fuel pump and also supplies a varying voltage to the fuel tank pump module in order to maintain the desired fuel rail pressure.

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