10-16 SERVICING INFORMATION ELECTRICAL Complaint Symptom and possible causes Remedy No sparking or poor 1. Defective ignition coils Replace. sparking 2. Defective spark plugs Replace. 3. Defective CKP sensor Replace. 4. Defective ECM Replace. 5. Defective TO sensor Replace. 6. Open-circuited wiring connections Check and repair. Spark plug soon 1. Mixture too rich Inspect FI system. become fouled with 2. Idling speed set too high Adjust fast idle or throttle carbon. stop screw. 3. Incorrect gasoline Change. 4. Dirty air cleaner element Replace. 5. Too cold spark plugs Replace with hot type plug. Spark plug become 1. Worn piston rings Replace. fouled too soon. 2. Worn piston or cylinders Replace. 3. Excessive clearance of valve stems in valve Replace. guides 4. Worn stem oil seal Replace. Spark plug elec- 1. Too hot spark plugs Replace with cold type E trodes overheat or plugs. burn 2. Overheated the engine LTune up. 3. Loose spark plugs P Retighten. 4. Too lean mixture Inspect FI system. Generator does not 1. Open- or short-circuited lead wires, or loose lead Repair or replace or charge. connections M retighten. 2. Short-circuited, grounded or open generator coil Replace. A 3. Short-circuited or punctured regulator/rectifier Replace. Generator does 1. Lead wires tend to get shorted or open-circuited Repair or retighten. S charge, but charg- or loosely connected at terminals. ing rate is below the 2. Grounded or open-circuited generator coil Replace. specification. 3. Defective regulator/rectifier Replace. 4. Defective cell plates in the battery Replace the battery. Generator over- 1. Internal short-circuit in the battery Replace the battery. charges 2. Damaged or defective regulator/rectifier Replace. 3. Poorly grounded regulator/rectifier Clean and tighten ground connection. Unstable charging 1. Lead wire insulation frayed due to vibration, Repair or replace. resulting in intermittent short-circuiting. 2. Internally shorted generator Replace. 3. Defective regulator/rectifier Replace. Starter button is not 1. Run down battery Repair or replace. effective. 2. Defective switch contacts Replace. 3. Brushes not seating properly on starter motor Repair or replace. commutator 4. Defective starter relay/starter interlock switch Replace. 5. Defective main fuse Replace.