User manual MITSUBISHI ENGINE ELECTRICAL SPECIFICATIONS

[. . . ] 31 16-2 ENGINE ELECTRICAL - Charging System CHARGING SYSTEM GENERAL INFORMATION The charging system uses the alternator output to keep the battery charged at a constant level under various electrical loads. Voltage OPERATION Rotation of the excited field coil generates AC voltage in the stator. This alternating current is rectified through diodes to DC voltage having a waveform shown in the illustration at left. The average output voltage fluctuates slightly with the alternator load condition. Approx. 14. 4 V Time When the ignition switch is turned on, current flows in the field coil and initial excitation of the field coil occurs. [. . . ] 14. AC" Startor Plate Regulator assembly Brush Slinger Rectifier Rear bracket ENGINE ELECTRICAL - Charging System DISASSEMBLY SERVICE POINTS 16-13 AA" FRONT BRACKET ASSEMBLY REMOVAL Insert flat tip screwdrivers or the like in the clearance between the front bracket assembly and stator core, to pry open and separate the stator and front bracket. Caution Do not insert the screwdriver too far, or the stator coil gets damaged. AB" ALTERNATOR PULLEY REMOVAL Face the pulley side upward, fix the rotor with a work bench and remove the pulley. Caution Use care not to damage the rotor. Soldered AC" STATOR/REGULATOR ASSEMBLY REMOVAL 1. Complete this work within four seconds not to transfer heat to the diode. When removing the rectifier from the regulator assembly, remove the soldered sections of the rectifier. Caution (1) Use care to make sure that the heat of the soldering iron is not transmitted to the diodes for a long period. (2) Use care that no undue force is exerted to the lead wires of the diodes. 16-14 ENGINE ELECTRICAL - Charging System REASSEMBLY SERVICE POINTS Wire "AA REGULATOR ASSEMBLY INSTALLATION After installing the regulator assembly, insert a wire into the hole provided on the rear bracket while pressing in the brush to fix the brush. NOTE The brush is fixed when a wire is inserted, making rotor installation easier. Rear bracket Brush Wire Wire "BA ROTOR INSTALLATION After installing the rotor, remove the wire used to fix the brush. INSPECTION 16100170216 ROTOR CHECK 1. Check the continuity between the rotor coil slip rings, and replace the rotor if the resistance value is not at the standard value. Check the continuity between the slip ring and core, and if there is continuity, replace the rotor. ENGINE ELECTRICAL - Charging System 16-15 STATOR CHECK 1. Check the continuity between the coil leads, and if there is continuity, replace the stator. 2. Check the continuity between the coil and core, and if there is continuity, replace the stator. RECTIFIER CHECK 1. Inspect the (+) heat sink by checking the continuity between the (+) heat sink and stator coil lead wire connection terminal using a tester probe. If there is a continuity at both, the diode is short circuited, so replace the rectifier. 2. Inspect the ( - ) heat sink by checking the continuity between the ( - ) heat sink and stator coil lead wire connection terminal using a tester probe. If there is a continuity at both, the diode is short circuited, so replace the rectifier. 3. Check the diode trio by connecting an ohmmeter to both ends of each diode and check the continuity of the three diodes. If there is a continuity at both ends, or if there is no continuity, the diode is damaged so replace the rectifier. 16-16 ENGINE ELECTRICAL - Charging System BRUSH CHECK 1. Measure the length of the brush protrusion shown in the illustration, and replace the brush if the measured value is below the limit value. Protrusion length Limit: 2 mm or less Soldered 2. The brush can be removed if the solder of the brush lead wire is removed. When installing a new brush, insert the brush into the holder as shown in the illustration, and then solder the lead wires. ENGINE ELECTRICAL - Starting System 16-17 STARTING SYSTEM GENERAL INFORMATION If the ignition switch is turned to the "START" position, current flows in the pull-in and holding coils provided inside magnetic switch, attracting the plunger. When the plunger is attracted, the lever connected to the plunger is actuated to engage the starter clutch. [. . . ] This causes the primary currents in the ignition coils to be alternately interrupted and allowed to flow to fire the cylinders in the order 1 - 3 - 4 - 2. The engine-ECU determines which ignition coil should be controlled by means of the signals from the camshaft position sensor and the crank angle sensor. It also detects the crankshaft position, in order to provide ignition at the most appropriate timing in response to the engine operation conditions. When the engine is cold or running at high altitudes, the ignition timing is slightly advanced to provide optimum performance. [. . . ]