Dtc P0230/P0232 Fuel Pump Fault; Circuit Description; Diagnostic Aids - Briggs & Stratton VANGUARD M490000 Repair Manual

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Circuit Description

The fuel pump is controlled by the ECM via the ground
circuit of the fuel pump plug. if resistance is unacceptable
in that circuit the fuel pump DTC is set.
• DTC 230 shows that the signal voltage is low, which
indicates voltage is lost to the pump, high circuit
resistance, or open connection.
• DTC 232 indicates that higher than expected voltage
is seen on the circuit, which means that the fuel pump
is not providing enough resistance or is turning too
slowly.
When the ignition switch is turned ON, the ECM activates
the electric fuel pump module. The fuel pump module
remains ON as long as the ECM receives reference
pulses from the CKP sensor. If there are no reference
pulses, the ECM turns the fuel pump relay OFF after
about 2 seconds. This shuts off the fuel pump. The
fuel pump module delivers fuel to the fuel rail and fuel
injectors.
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DTC P0230/P0232 FUEL PUMP FAULT

Diagnostic Aids

The following conditions may have caused the fuel pump
fuse to malfunction:
1. Faulty fuse.
2. Intermittent short in the fuel pump power feed circuit.
3. Fuel pump has an intermittent internal problem.
4. Poor ECM connection.
5. Inspect wire harness connectors for backed out
terminals, improper mating, broken locks, improperly
formed or damaged terminals, and poor terminal to
wire connection.
6. Inspect wire harness and relay for damage.
7. Check fuse block for an open fuse.
Always clear DTCs after performing repairs.