Briggs & Stratton BIG BLOCK EFI, Repair Manual

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50 Section 2: Troubleshooting DTCs
Step Action Yes No
1
1. Disconnect and reconnect fuel pump module and
ECM J2 (Black) connectors.
2. Turn Ignition ON, Engine OFF.
3. Clear codes.
4. Turn Ignition OFF, and then back ON.
5. Does DTC return?
Go to step 2.
Problem
corrected.
2
1. Turn Ignition OFF, and then back ON.
2. Does fuel pump run for 2 seconds? Fuel pump
module OK.
Go to step 3.
3
1. Turn Ignition OFF.
2. Back probe terminal 2 (Red wire) of fuel pump
module connector.
3. Connect terminal 2 back probe to red meter test
lead on DVOM.
4. Connect black meter test lead on DVOM to a
known good ground.
5. Set DVOM to read volts DC.
6. Turn Ignition ON, Engine OFF.
7. Does DVOM read 12.2-13.5 volts DC?
Go to step 4.
Perform visual
and continuity check
of Main Power Relay
and 20 amp
Battery fuse (Yellow).
4
1. Turn Ignition OFF.
2. Disconnect fuel pump module connector.
3. Remove probe from terminal 2, and back probe
terminal 1 (Blue/Yellow wire) of fuel pump module
connector.
4. Connect terminal 1 back probe to red meter test
lead on DVOM.
5. Disconnect ECM J2 connector.
6. Back probe terminal J2-09 (Blue/Yellow wire) of
ECM J2 connector.
7. Connect terminal J2-09 back probe to black me-
ter test lead on DVOM.
8. Set DVOM to read resistance.
9. Does DVOM read 0.5 ohm or less?
Replace fuel
pump module.
Resistance reading is
above 0.5 ohm.
Check terminals for
corrosion or replace
EFI wire harness.
DTC P0230 Fuel Pump Fault
Scan and Non-Scan Diagnostics
1
9
10
18
J2-09
1
2
1
2
Figure 2-38 Fuel Pump Module Connector.
Figure 2-39 ECM J2 Connector (Black).