LEMON Manuals: Even more car manuals for everyone
Home >> Mercedes Benz >> 2024 >> S580e >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Electrical System -- Engine -- 223 Chassis >> Testing & Repair >> Test Alternator Charging Current - AR15.40-P-5011SVZ

Test Alternator Charging Current - AR15.40-P-5011SVZ

Engine 279 in model 223 

Connection scheme 

G16190357Courtesy of MERCEDES-BENZ USA
WARNING Risk of burn injuries  , suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning  caused by skin contact with solid components of the exhaust. Wear protective clothing and safety glasses. Use the extraction system. Move people out of the danger zone. AS49.00-Z-0001-01A
WARNING Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running. Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. AS00.00-Z-0005-01A
INSPECT Check     
1 Implement preconditions for alternator test. If required. AR15.40-P-5009SVZ 
2 Connect load tester (079) with current clamp (065) in accordance with connection scheme.    
REFER TO SPECIAL TOOLS 000 588 31 19 00 Load tester   WS15.00-P-0077B 
3 Start engine.    
4 Check charging current at increased engine rpm; in this connection, load on-board electrical system battery (G1) using load tester (079). IMPORTANT Change load resistance until maximum charging current is reached.
In this connection, take into account charging voltage.
HAND-HELD TESTER Charging current for alternator
If charging current falls below specified value:
↓
Check diodes of alternator (G2/4) and/or replace alternator (G2/4).
*BE15.40-P-1001-01L 
    Test alternator diodes AR15.40-P-9301-02SVZ 
    Remove/install alternator AR15.40-P-5032SVZ 
5 Switch off engine.    
6 Disconnect load tester (079) and current clamp (065).    
CHECK VALUES FOR ALTERNATOR

Number Designation Engine 279 in model 217, 222, 223
BE15.40-P-1001-01L Charging current for alternator max. A 250
min. A 190
Engine speed 1/min 2200
Ratio i= 2, 76