TOHATSU MFS 25D Service Manual page 325

Electrical System
1. Special Tools .................................... 8-2
2. Electrical Component Layout ......... 8-3
Port Side View .................................... 8-3
Bow Side View .................................... 8-4
Starboard Side View .............................. 8-5
Housing Cover (Front) ........................... 8-6
3. Parts Layout .................................... 8-8
Magneto ............................................. 8-8
Electrical Parts .................................... 8-10
Intake Manifold .................................... 8-14
Fuel System ....................................... 8-16
4. The Ignition System and the
Ignition Control System .................. 8-20
1) Inspection of the Ignition Spark ............ 8-20
2) Inspection of the Plug Cap .................. 8-20
3) Inspection of the Ignition Coil ............... 8-21
4) Inspection of the Exciter Coil and ECU
Charge Coil .................................... 8-21
5) Inspection of the Pulser Coils ............ 8-22
6) Adjustment of the Pulser Coil Air Gap ... 8-22
7) Inspection of the Oil Pressure Switch ... 8-23
8) Inspection of the Engine Temperature Sensor 8-24
9) Inspection of the Neutral Switch
(Except for MF) ................................. 8-24
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10) Inspection of the Start Switch (EF, EFT) ... 8-25
11) Inspection of the Main (Key) Switch ...... 8-25
12) Inspection of the Stop Switch
(Except for MF) ................................. 8-26
5. The Fuel Control System .................. 8-27
1) Inspection of the Injector ..................... 8-27
2) Inspection of the ISC Valve ............... 8-27
3) Inspection of the T-MAP Sensor ......... 8-28
4) Inspection of the Fuel Feed Pump (FFP) ... 8-28
5) Inspection of the Throttle Position
Sensor (TPS) ................................. 8-29
6. The Starting System (Except for MF) ... 8-29
1) Inspection of the Fuse ........................ 8-29
2) Inspection of the Starter Solenoid ......... 8-29
3) Disassembly of the Starter Motor ......... 8-30
4) Inspection of the Starter Motor Pinion ... 8-30
5) Inspection of the Armature .................. 8-30
6) Inspection of the Brush ..................... 8-31
7) Starter Motor Operation Test ............... 8-32
7. The Charging System (Except for MF) ... 8-32
1) Inspection of the Charge Coil ............... 8-32
2) Inspection of the Rectifier .................. 8-32
8. ECU Coupler .................................... 8-33
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