Briggs & Stratton VANGUARD 810 EFI Repair Manual page 52

48
DTC P0202 Cylinder 2 Fuel Injector Fault
Step
1. Disconnect and reconnect cylinder 2 fuel injector and
ECM J2 (Black) connectors.
1 2. Turn Ignition ON, Engine OFF. Clear codes.
3. Turn Ignition OFF, and then back ON.
4. Does DTC return?
1. Turn Ignition OFF.
2. Disconnect fuel injector connector.
2
3. Install Briggs & Stratton Noid Light (Part No. 19623).
4. Start and run engine.
5. Does Noid Light fl ash?
1. Turn Ignition OFF.
2. Remove Noid Light and connect fuel injector connector.
3. Back probe (using fused patch cord) terminal A (Red
wire) of fuel injector connector.
4. Connect terminal A back probe to red meter test lead on
3
DVOM.
5. Connect black meter test lead to a known good ground.
6. Set DVOM to read volts DC.
7. Turn Ignition ON, Engine OFF.
8. Does DVOM read 12.2-13.5 volts DC?
1. Turn Ignition OFF.
2. Disconnect fuel injector connector.
3. Disconnect ECM J2 connector.
4. Back probe terminal B (Lt. Blue/White wire) of fuel injec-
tor connector.
5. Connect terminal B back probe to red meter test lead
4
on DVOM.
6. Back probe terminal J2-06 (Lt. Blue/ White wire) of
ECM J2 connector.
7. Connect terminal J2-06 back probe to black meter test
lead on DVOM.
8. Set DVOM to read resistance.
9. Does DVOM read less than 0.5 ohms?
B
A
Figure 2-36 Cylinder 2 Fuel Injector Connector.
Scan and Non-Scan Diagnostics
Action
A B
Section 2: Troubleshooting DTCs
Go to step 2.
Replace fuel
Go to step 4.
Control circuit
1
10
J2-06
Figure 2-37 ECM J2 Connector (Black).
Yes
Problem
corrected.
Go to step 3.
injector.
Reading is below
12.2 volts DC.
Perform visual and
continuity check of
Main Power Relay
and 20 amp Bat-
tery fuse (Yellow).
Reading is above
0.5 ohms. Check
terminals for corro-
sion or replace EFI
wire harness.
NOTE: If DTC still
is OK.
present after re-
placement of EFI
wire harness, then
replace ECM due
to failed injector
driver.
9
18
No