Advanced Diagnostics

Advanced Diagnostics

DTC P0563: Engine Control Module (ECM)/Powertrain Control Module (PCM) Power Source Circuit Unexpected Voltage







General Description
If there is a short to ground in the harness between the engine control module (ECM)/powertrain control module (PCM) and PGM-FI main relay 1, PGM-FI main relay 1 stays ON even if the ignition switch is turned to LOCK (0), and the ECM/PCM remains active. However, the engine is not running because the power for the gauges, the ignition, and the fuel pump is turned OFF by the ignition switch. When the ECM/PCM operates for a set time after turning the ignition switch 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 ECM/PCM operates for at least 5 seconds after turning the ignition switch to LOCK (0).

Diagnosis Details

Conditions for illuminating the MIL
When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM/PCM memory. If the malfunction recurs during the next (second) drive cycle, the DTC and the freeze frame data are stored.The MIL does not come on.

Conditions for clearing the MIL
The DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.