Chevrolet Sonic Repair Manual: Fuel Pump Flow Control Module Replacement

Chevrolet Sonic Repair Manual / Powertrain / Internal Combustion Powertrain Control / Engine Control / General / Fuel Pump Flow Control Module Replacement

Fuel Pump Flow Control Module Replacement
Callout	Component Name
Preliminary Procedures Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection. Remove the right rear compartment side trim panel. Refer to Rear Compartment Side Trim Replacement - Right Side. Disconnect the electrical wiring harness connector from the fuel pump control module.
1	Fuel Pump Control Module Fastener Caution: Refer to Fastener Caution. Tighten 10 Y (89 lb in)
2	Fuel Pump Control Module Caution: Turn the ignition OFF when installing or removing the control module connectors and disconnecting or reconnecting the power to the control module (battery cable, powertrain control module (PCM)/engine control module (ECM)/transaxle control module (TCM) pigtail, control module fuse, jumper cables, etc.) in order to prevent internal control module damage. Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery voltage when servicing a control module, using battery booster cables, or when charging the vehicle battery. In order to prevent any possible electrostatic discharge damage to the control module, do no touch the connector pins or the soldered components on the circuit board. Remove any debris from around the control module connector surfaces before servicing the control module. Inspect the control module connector gaskets when diagnosing or replacing the control module. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the control module. The replacement control module must be programmed. Procedure Remove the fuel pump control module from the module bracket. If replacing the fuel pump control module, refer to Control Module References for programming and setup.

Fuel Pressure Relief

Special Tools EN-34730-91 Pressure Tester For equivalent regional tools, refer to Special Tools. Warning: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ig ...

Fuel System Cleaning

Note: If the fuel filter is plugged, the fuel tank should be inspected internally and cleaned if necessary. Drain the fuel tank. Refer to Fuel Tank Draining. Remove the f ...

Other materials:

Rocking the Vehicle to Get it Out
Turn the steering wheel left and right to clear the area around the front wheels. Turn off any traction system. Shift back and forth between R (Reverse) and a low forward gear, spinning the wheels as little as possible. To prevent transmission wear, wait until the wheels stop spinning before s ...

Neutral - Engine Running (Gen 1)
When the gear selector is moved to the Neutral (N) position, the hydraulic and electrical system operation is identical to Park (P) range. However, if Neutral is selected after the vehicle was operating in Reverse (R), the normally-high 35R pressure control solenoid 2 is commanded OFF and the ...

Piston and Connecting Rod Assemble
Special Tools EN-49941 Remover / Installer Piston Retainer Ring For equivalent regional tools, refer to Special Tools. Note: Lubricate the piston pin with clean engine oil. Install the connecting rod (3) and the piston pin (2) to the piston (1). Install t ...

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