Set in Fuel Pump Flow Control Module (FPCM)

DTC P0601, P0602, P0603, P0604, P0606, P0607, P060D, P062F, or P2610 (set in FPCM)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0601 00
- Control Module Read Only Memory (ROM)

DTC P0602 00
- Control Module Not Programmed

DTC P0603 00
- Control Module Long Term Memory Reset

DTC P0604 00
- Control Module Random Access memory (RAM)

DTC P0606 00
- Control Module Internal Performance

DTC P062F 00
- Control Module Long Term Memory Performance

Circuit/System Description

The internal fault detection is handled inside the fuel pump control module (FPCM). No external circuits are involved.

Conditions for Running the DTC

The FPCM runs the program to detect an internal fault when power up is commanded. The only requirements are voltage and ground. This program runs even if the voltage is out of the valid operating range.

Conditions for Setting the DTC

The FPCM has detected an internal malfunction.

Action Taken When the DTC Sets

The FPCM refuses all additional inputs.

Conditions for Clearing the DTC

* A current DTC clears when the malfunction is no longer present.
* A history DTC clears when the module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.

Diagnostic Aids

* This DTC may be stored as a history DTC without affecting the operation of the module.
* If stored only as a history DTC and not retrieved as a current DTC, do not replace the module.
* If this DTC is retrieved as both a current and history DTC, replace the module that the DTC set for.

Circuit/System Verification

Verify that the FPCM is programmed correctly. If this DTC is still retrieved as current, replace the FPCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair. Verification Tests

Refer to Programming and Relearning for FPCM setup and programming. Programming and Relearning