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Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Controls And Fuel - 1.6L (LH7) Diesel - Diagnostic Information And Procedures (P205B - P2BAA) And Symptoms) >> Diagnostic Information And Procedures >> DTC P2635: Fuel Pump Flow Performance >> Circuit/System Description

Circuit/System Description

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After the vehicle has been powered Off for at least 2 min and the ignition is turned On, the engine control module (ECM) sends a signal via the fuel pump primary relay circuit to the fuel pump driver control module. The fuel pump driver control module enables the fuel pump for 30 s or continuously when the engine is running. The fuel pump driver control module actuates the brushless fuel pump by means of a high power three phase signal and controls the fuel pump speed according to serial data signals received from the ECM containing the desired fuel pump speed.

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