Engine Electrical

DTC P0563

Circuit Description

The engine control module (ECM)/powertrain control module (PCM) continuously monitors that the system voltage stays within the proper range. If the ECM/PCM detects an excessively high system voltage, DTC P0563 will set. A high voltage condition may cause a stalling condition or other driveability concerns.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0563 System Voltage High

Conditions for Running the DTC

* The engine run time is more than 20 seconds.
* The engine is running above 1,200 RPM.
* The vehicle speed is above 8 km/h (5 mph).

Conditions for Setting the DTC

* The ECM/PCM senses the system voltage is above 19 volts.
* All of the conditions are present for 5 seconds.

Action Taken When the DTC Sets

* The ECM/PCM stores DTC P0563 in the PCM memory when the diagnostic runs and fails.
* The ECM/PCM will record the operating conditions at the time the diagnostic fails. The ECM/PCM stores this information in Failure Records.
* The ECM/PCM disables most outputs.
* The transmission defaults to a predetermined gear.
* The torque converter clutch (TCC) operation is inhibited.
* The instrument panel cluster (IPC) displays a message.
* The malfunction indicator lamp (MIL) will not illuminate.

Conditions for Clearing the DTC

* The Conditions for Setting the DTC are no longer present.
* A history DTC will clear after 40 malfunction-free ignition cycles.
Test

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