DTC Advanced Diagnostics: P0563
DTC P0563:Powertrain Control Module (PCM) Power Source Circuit Unexpected Voltage

General Description
Without Keyless Access System:

With Keyless Access System:

If there is a short to ground in the harness between the powertrain control module (PCM) and PGM-FI main relay 1 circuit, PGM-FI main relay 1 circuit stays ON even if the vehicle is turned to the OFF (LOCK) mode, and the PCM remains active. However, the engine is not running because power for the gauges, the ignition, and the fuel pump is turned OFF by the ignition switch. When the PCM operates for a set time after the vehicle is turned to the OFF (LOCK) mode, it detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type
Execution
Continuous
Sequence
None
Duration
5 seconds or more
DTC Type
Two drive cycles, MIL off

Enable Conditions
Condition
Minimum
Maximum
12 volt battery voltage [BATTERY] (FI MAIN RLY OUT terminal of PCM)
10.0 V
–
Vehicle
OFF (LOCK) mode
[ ]: HDS Parameter

Malfunction Threshold
The PCM operates for at least 5 seconds after the vehicle is turned to the OFF (LOCK) mode.

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
PGM-FI main relay 1 circuit stuck on failure
PGM-FI main relay 1 circuit FI MAIN RLY CL- line short to ground
PCM internal circuit failure

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, a Confirmed DTC and the freeze data are stored. The MIL does not come on.

Conditions for clearing the DTC
The Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.