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Home >> Chevrolet >> 2021 >> Blazer RS, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Controls And Fuel - 2.5L (LCV) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> Fuel System Diagnosis >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different variant/trim than selected.

For an overview of the component/system, refer to: Fuel System Description

Component Description
G12 Fuel Pump The fuel pump has a DC motor that is controlled by a PWM signal to achieve the desired fuel pressure.
K111 Fuel Pump Driver Control Module The control module contains a microprocessor used to process input data to control outputs.
The control module communicates with the engine control module via serial data.

When the ignition is turned On, the ECM sends a 12 V signal to the control module K111 to enable the fuel pump. If the engine is not started, the control module K111 turns the fuel pump Off after 6 s.

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