Starting and Charging Diagnosis
DTC P0563
CIRCUIT DESCRIPTION
The powertrain control module (PCM) continuously monitors that the system voltage stays within the proper range. If the 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.
- Engine running above 1200 RPM
- Vehicle speed above 8 km/h (5 mph)
CONDITIONS FOR SETTING THE DTC
- The PCM senses the system age is above 19 seconds.
- All of the conditions are present for 5 seconds.
ACTION TAKEN WHEN THE DTC SETS
- The PCM stores DTC P0563 in the PCM memory when the diagnostic runs and fails.
- The PCM will record the operating conditions at the time the diagnostic fails. The PCM stores this information in Failure Records.
- The 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.
- The powertrain control module (PCM) receives the clear code command from the scan tool.
TEST
