Briggs & Stratton VANGUARD 810 EFI Repair Manual page 73

Section 2: Troubleshooting DTCs
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 extin-
guished and the DTC is stored in the ECM as
a historic code.
1.4W Lamp or
O
LED with Resister
+12v From
Switched Source
ORANGE/BLACK
J1 03
MIL
Diagnostic Aids
Check for the following conditions:
1. Poor ECM connection. Inspect wire har-
ness 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 har-
nesses related to the MIL. A change in the
MIL display will indicate the location of the
fault.
Always clear DTCs after performing repairs.
ECM
69