Section 03
ENGINE
Subsection 02
(TROUBLESHOOTING)
VMR2004_125_03_02A.FM
03-02-3
SYMPTOM
NO SPARK.
CONDITION
NORMAL USE.
Test/Inspection
4. Check spark plug electrode condition.
a. Gap is too big.
Readjust gap (refer to TECHNICAL DATA).
b. Spark plug condition is bad.
Diagnose spark plug condition and replace it (refer to IGNITION SYSTEM).
5. Check spark plug cable and ignition wire.
a. Cable and/or ignition wire is (are) damaged and/or shows electrical failure.
Replace damaged part(s).
6. Check ignition coil for damage and/or electrical failure.
a. Ignition coil damaged and/or resistance value out of specification
(refer to
TECHNICAL DATA
).
Replace ignition coil.
b. Connector is corroded or ignition coil shows electrical failure.
Clean connector area and/or replace ignition coil.
c. Wire harness is brittle or hard (no connection).
Replace.
7. Check CPS (crankshaft position sensor) for damage and/or electrical failure.
a. Sensor shows electrical failure and/or damages.
Replace CPS.
b. Connector is corroded.
Clean and reconnect.
c. Resistance value is out of specification
(refer to
TECHNICAL DATA
).
Replace CPS.
8. Check wire harness for cracks or other damages.
a. Harness shows electrical failure and/or other damages.
Replace wire harness and/or damaged wire section.
9. Check magneto for damage and/or electrical failure.
a. Radial position of rotor wrong due to a broken woodruff key.
Replace
woodruff key
.
b. Connector on magneto is damaged and/or has electrical failure.
Repair and clean contacts of connector.
c. Coating on stator winding is damaged.
Replace magneto.
d. Resistance value is out of specification
(refer to
TECHNICAL DATA
).
Replace magneto.
10. Check electronic module.
a. Module shows electrical failure or damages.
Replace electronic module.
b. Connectors are corroded.
Clean and reconnect.
c. Electronic module has bad ground to the vehicle frame.
Clean metal surface for good ground.
