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DTC P025ADiagnostic Instructions
DTC DescriptorDTC P025A: Fuel Pump Control Module Enable CircuitDiagnostic Fault Information
Circuit/System DescriptionThe engine control module (ECM) supplies voltage to the fuel pump 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 supplies a varying voltage to the fuel tank pump module in order to maintain the desired fuel rail pressure. Conditions for Running the DTCThe ignition is ON. Conditions for Setting the DTCThe serial data message from the ECM to the fuel pump control module does not agree with the state of the control enable voltage signal supplied from the ECM to the fuel pump control module for more than 2 seconds. Action Taken When the DTC SetsDTC P025A is a Type A DTC. Conditions for Clearing the DTCDTC P025A is a Type A DTC. Reference InformationSchematic ReferenceConnector End View ReferenceDescription and OperationElectrical Information ReferenceDTC Type ReferencePowertrain Diagnostic Trouble Code (DTC) Type Definitions Scan Tool ReferenceControl Module References for scan tool information Circuit/System Testing
Repair InstructionsPerform the Diagnostic Repair Verification after completing the diagnostic procedure. Control Module References for ECM or fuel pump control module replacement, setup, and programming |
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