Vehicle starting and charging system Mercedes Sprinter I (903)
Battery — general information The 12 V battery installed in automobiles has six cells (cans), which consist of plates of positive and negative poles immersed in a solution of sulfuric acid...
Description of battery characteristics Designation Located on the battery case, contains technical data. For example: 12 V 66 Ah 200 A (12 V - nominal voltage, 66 Ah - nominal capacity, 200 A - control cold...
Checking and servicing the battery Electrolyte level The battery is maintenance-free. An electrolyte is poured into it - a solution of sulfuric acid in distilled water. Since the water from the solution...
Faulty Consumer Detection If a battery that worked properly the day before suddenly does not give current, it is possible that a faulty consumer in the circuit discharged it overnight. This...
Alternator — general information When the engine is not running, electricity consumers are powered by the battery. When the engine is running, the alternator serves as the power source. Despite its...
Alternator Circuit Precautions The following precautions must be observed when working on the generator circuit: never disconnect the battery terminals or voltage regulator leads while the engine is...
Checking the generator without dismantling During the trip, with normal operation of the charging system, the indicator lamp in the instrument cluster should not light up. If not, the alternator or voltage...
Replacement of brushes and generator voltage regulator Self-adjustment or repair of the generator and the voltage regulator connected to it is recommended only if you have experience in such work. In some workshops, the old...
Starter — general information On Mercedes-Benz Sprinter cars, a starter is installed with forced engagement and disengagement of the gear. When starting the engine, the starter operates as follows:...
Starter check To test the starter under full voltage, connect the leads «30» (big withdrawal) And «50» (small wire next to large terminal) wire with a cross-sectional area of at least...
Possible starter malfunctions The following recommendations will help you solve the problem of troubleshooting in the field. When the key is turned in the ignition, the starter turns slowly, does not...