Dtc P0351 Cylinder 1 Ignition Coil Fault (Non-Scan Diagnostics) - Briggs & Stratton VANGUARD M490000 Repair Manual

DTC P0351 Cylinder 1 Ignition Coil Fault (Non-Scan Diagnostics)

Step
1 1. Disconnect and reconnect cylinder 1 ignition coil and ECM J2 (Black) connectors.
2. Turn Ignition ON, Engine OFF. Clear codes.
3. Turn Ignition OFF, and then back ON.
4. Does DTC return?
2 1. Turn Ignition OFF.
2. Disconnect ignition coil connector.
3. Install Briggs & Stratton Noid Light (Part No. 19623).
4. Observe Noid Light while cranking engine.
5. Does Noid Light flash (but very dimly)?
3
1. Turn Ignition OFF.
2. Back probe (using fused patch cord) terminal A (Yellow wire) of ignition coil connector.
3. Connect terminal A 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?
4 1. Turn Ignition OFF.
2. Remove probe from terminal A, and back probe terminal B (Violet/Black wire) of ignition
coil connector.
3. Connect terminal B back probe to red meter test lead on DVOM.
4. Disconnect ECM J2 connector.
5. Back probe terminal J2-01 (Violet/Black wire) of ECM J2 connector.
6. Connect terminal J2-01 back probe to black meter test lead on DVOM.
7. Set DVOM to read resistance.
8. Does DVOM read 0.5 ohms or less?
Cylinder 1 Ignition Coil Connector
Action
ECM J2 (Black) Connector
Yes No
Go to step 2. Problem corrected.
Circuit OK. Go to step 3.
Replace ignition coil.
Go to step 4. Reading is below
12.2 volts DC.
Perform visual and
continuity check
of Main Power
Relay and 20
amp Battery fuse
(Yellow).
Replace ignition coil. Resistance reading
is above 0.5 ohms.
Repair or replace
EFI wire harness.
2
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