Mercedes-Benz ML320. Manual — part 355

Fig. 10: Checking Voltage Regulator (Chassis 163)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

DIODE TEST

2001 Mercedes-Benz ML320

2001-04 STARTING & CHARGING SYSTEMS Generators & Regulators - 163 Chassis

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Connect DC clip-on probe from engine tester with oscilloscope to positive battery terminal. See Fig. 11 . Start
engine. Switch on low beam. Access diode test at 3000 RPM. See Fig. 12 -Fig. 14 . Replace generator as
necessary.

2001 Mercedes-Benz ML320

2001-04 STARTING & CHARGING SYSTEMS Generators & Regulators - 163 Chassis

me

2001 Mercedes-Benz ML320

2001-04 STARTING & CHARGING SYSTEMS Generators & Regulators - 163 Chassis

me

Fig. 11: Identifying Oscilloscope Connection
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig. 12: Identifying Oscilloscope Patterns (No Fault Indicated)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

2001 Mercedes-Benz ML320

2001-04 STARTING & CHARGING SYSTEMS Generators & Regulators - 163 Chassis

me