Briggs & Stratton VANGUARD M490000 Repair Manual page 53

Step
4 1. Turn Ignition OFF.
2. Disconnect fuel injector connector.
3. Disconnect ECM J2 connector.
4. Back probe terminal B (Lt. Blue/Black wire) of fuel injector connector.
5. Connect terminal B back probe to red meter test lead on DVOM.
6. Back probe terminal J2-05 (Lt. Blue/Black wire) of ECM J2 connector.
7. Connect terminal J2-05 back probe to black meter test lead on DVOM.
8. Set DVOM to read resistance.
9. Does DVOM read less than 0.5 ohms?
Action Yes
Control circuit is OK. Reading is above 0.5
ohms. Check terminals
for corrosion or replace
EFI wire harness.
NOTE: If DTC
still present after
replacement of EFI
wire harness, then
replace ECM due to
failed injector driver.
No
2
49