Mercedes-Benz ML320. Service 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

  

me 

 

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