P0563

CIRCUIT DESCRIPTION
The PCM checks the system voltage to make sure that the voltage stays within the proper range. Damage to components, and incorrect input can occur when the voltage is out of range. The PCM monitors the system voltage over an extended length of time. If the PCM detects an excessively high system voltage, DTC P0563 will set.

CONDITIONS FOR RUNNING THE DTC
- Vehicle speed above 5 mph.
- System voltage between 9.5 and 18 volts.

CONDITIONS FOR SETTING THE DTC
The PCM detects a system voltage above 16 volts for less than 1 second.

ACTION TAKEN WHEN THE DTC SETS
- The PCM will command a message to be displayed.
- The PCM will not illuminate the Malfunction Indicator Lamp (MIL).
- The PCM will store conditions which were present when the DTC set as Fail Records data only.

CONDITIONS FOR CLEARING THE DTC
- The PCM will command the message OFF after one trip in which the diagnostic test has been run and passed.
- The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
- The DTC can be cleared by using the scan tool Clear DTC Information function.

TEST

Step 1 - 5: