Dtc P0201/P0202 Cylinder 1 Or Cylinder 2 Fuel Injector; Circuit Description; Diagnostic Aids - Briggs & Stratton VANGUARD M490000 Repair Manual

DTC P0201/P0202 CYLINDER 1 OR CYLINDER 2 FUEL INJECTOR

Circuit Description

The ECM controls each fuel injector by grounding the
control circuit via a solid state device called a driver. If the
ECM detects an unacceptable difference in resistance, a
fuel injector control DTC is set.
Although the DTC indicates which fuel injector is faulty,
the technician must determine if the fault is in the ground
circuit or the +12v circuit from the main power relay.
NOTE: If an ignition coil fault code is active, the fuel
injector for the same cylinder is turned off.

Diagnostic Aids

Check for the following conditions:
1. Poor ECM connection.
2. Inspect wire harness connectors for backed out
terminals, improper mating, broken locks, improperly
formed or damaged terminals, and poor terminal to
wire connection.
3. Damaged wire harness and/or connectors. If harness
appears to be OK, shake or wiggle wire harness
and/or connector with DVOM attached. Radical
voltage changes can indicate the location of the fault
condition.
4. Open fuse in fuse block.
Always clear DTCs after performing repairs.
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