P164B

DTC P164B or P164C

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P164B

-
Fuel Pump Driver Control Module Read Only Memory (ROM)

DTC P164C

-
Fuel Pump Driver Control Module Random Access Memory (RAM)

Circuit/System Description

The control module runs a program to detect an internal fault when power up is commanded.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

The FPCM relay has detected an internal malfunction.

Action Taken When the DTC Sets

DTCs P12A7 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P12A7 are Type B DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics (LS3) [1][2]Electrical DiagramsEngine Controls Schematics (LS7) [1][2]Electrical DiagramsEngine Controls Schematics (LS9) [1][2]Electrical Diagrams

Connector End View Reference

Component Connector End Views 5 Bow Lowered Switch (CM7)

Description and Operation

Fuel System Description (LS3 or LS7) Description and OperationFuel System Description (LS9) Description and Operation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

Verify that DTC P164B or DTC P164C is not set.

If the DTC is set, replace the fuel pump control module relay.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

Fuel Pump Flow Control Module Relay Replacement Fuel Pump Flow Control Module Relay Replacement