FPCM

DTC P0563 (FPCM)

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 P0563
- System Voltage High - FPCM

Diagnostic Fault Information





Typical Scan Tool Data





Circuit/System Description

The fuel pump control module (FPCM) monitors the battery voltage to ensure that the voltage stays within the proper range. Damage to components, and incorrect data may occur when the voltage is out of range.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The FPCM detects that the battery voltage is greater than 16 V.

Action Taken When the DTC Sets

DTC P0563 is a type C DTC.

Conditions for Clearing the DTC

DTC P0563 is a type C DTC.

Diagnostic Aids

* Some possible causes of this DTC are overcharging with a battery charger and jump starting.
* A high voltage value in multiple modules indicates a concern in the charging system.

Reference Information
Schematic Reference

Engine Controls Schematics ([1][2]Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Charging System Description and Operation (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)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference

Programming and Relearning (Programming and Relearning) for scan tool information

Circuit/System Verification

1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 V.

• If not within the specified range, refer to Charging System Test (Acadia or Enclave) (Charging System Test).

2. Observe the scan tool Ignition 1 Signal parameter. The reading should be between 12.6 and 15.0 V.

• If greater than the specified range, replace the FPCM.

Repair Instructions

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

Programming and Relearning (Programming and Relearning) - for FPCM replacement, setup, and programming.