DTC Advanced Diagnostics: P0563 (3.0L Engine)

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

General Description

Courtesy of HONDA, U.S.A., INC.

To supply power (FI_MAIN_RLY_OUT) for the powertrain control module (PCM), the FI_MAIN_RLY_CL- drive request that is generated from the logical sum of the external signal (IG1_VBSOL_2) and the internal signal (FI_MAIN_RLY_CL- drive request and soak timer) drives the FI_MAIN_RLY_CL- terminal, and turns PGM-FI main relay 1 on. After the ignition is turned to the OFF (LOCK) mode, the PCM monitors the duration of the state in which the power is not turned off even if the microcomputer (MCU) in the PCM turns off the FI_MAIN_RLY_CL- drive. If the condition continues for a specified duration, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	10 seconds or more
DTC Type	Two drive cycles, MIL on* 1, off* 2

*1: USA and Canada models*2: Mexico models

Enable Conditions

Condition
Vehicle	ON mode

Malfunction Threshold

The power supply does not turn off for at least 10 seconds even if the PCM requests to turn off the power 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 FI_MAIN_RLY_CL- line short to ground
PGM-FI main relay 1 FI_MAIN_RLY_OUT line short to power
PGM-FI main relay 1 stuck on failure
PCM internal circuit failure

Confirmation Procedure

Operating Condition

Turn the vehicle to the ON mode.
Turn the vehicle to the OFF (LOCK) mode, and leave the vehicle for at least 2 minutes. Make sure the engine coolant temperature [ECT Sensor 1] lowers to 140 deg.F (60 deg.C) or less.
Turn the vehicle to the ON mode.

[ ]: HDS Parameter

Diagnosis Details* 1

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 MIL comes on and a Confirmed DTC, the freeze data, and the on-board snapshot are stored.

Conditions for clearing the DTC

The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.

Diagnosis Details* 2

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, the freeze data, and the on-board snapshot are stored. The MIL does not come on.

Conditions for clearing the DTC

The Pending DTC, the Confirmed DTC, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.