Advanced Diagnostics

DTC P0563 Advanced Diagnostics

DTC P0563:

Powertrain Control Module (PCM) Power Source Circuit Unexpected Voltage





General Description

If there is a short to ground in the harness between the powertrain control module (PCM) and PGM-FI main relay 1, PGM-FI main relay 1 stays ON even though the ignition switch is in LOCK (0), 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 ignition switch is turned to LOCK (0), a malfunction is detected and a DTC is stored.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status





Enable Conditions





Malfunction Threshold

The PCM operates for at least 5 seconds after the ignition switch is turned to LOCK (0).

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, the 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 battery.