Dtc P0562/P0563 System Voltage; Circuit Description; Diagnostic Aids - Briggs & Stratton VANGUARD M490000 Repair Manual

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Circuit Description

The EFI system operates with a battery voltage of 9-16
volts. If the system voltage drops below 6.2 volts the ECM
will reset. During normal operation, the MIL is illuminated
if the voltage is below 9 volts (setting P0562) or above 16
volts (setting P0563) for a specified amount of time.
To determine the system voltage to the ECM, take a
voltage measurement at terminal J2-18. If the voltage is
not within 0.01 volt of the measurement obtained at the
battery measuring between the positive (+) and negative
(-) posts with a DVOM, determine the fault associated
with circuit J2-18.
Similarly, you should be able to measure battery voltage
at terminal J2-15 with Ignition ON, Engine OFF.
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DTC P0562/P0563 SYSTEM VOLTAGE

To further diagnose system voltage faults, see Section
7 of the Briggs & Stratton Intek V-Twin Cylinder OHV
Repair Manual.

Diagnostic Aids

Check for the following conditions:
1. Poor ECM connection. Inspect harness connectors
for backed out terminals, improper mating, broken
locks, improperly formed or damaged terminals, and
poor terminal to wire connection.
2. Damaged wire harness and/or connectors.
Always clear DTCs after performing repairs.