Dtc P0650 Malfunction Indicator Lamp (Mil) Malfunction; Circuit Description; Diagnostic Aids - Briggs & Stratton VANGUARD M490000 Repair Manual

DTC P0650 MALFUNCTION INDICATOR LAMP (MIL) MALFUNCTION

Circuit Description

The MIL gets 12v B+ when the ignition is in the ON or
RUN position. The ECM completes a ground signal to
illuminate the MIL with Ignition ON, Engine OFF. The
ECM also completes the ground signal to activate the
lamp if a DTC is set. If the malfunction clears, the lamp
is extinguished and the DTC is stored in the ECM as a
historic code.

Diagnostic Aids

Check for the following conditions:
1. Poor ECM connection. Inspect wire 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. If wire harness appears to be
OK, observe the MIL display while moving connectors
and wiring harnesses related to the MIL. A change in
the MIL display will indicate the location of the fault.
Always clear DTCs after performing repairs.
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