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Home >> Mercedes Benz >> 2017 >> B250 Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Electrical System - Engine - 246 Chassis >> Testing & Repair >> Check regulator and alternator - AR15.40-P-5000NKB

Check regulator and alternator - AR15.40-P-5000NKB

ENGINE 270 in MODEL 117, 156, 176, 242, 246 

ENGINE 607 in MODEL 117, 156, 176, 246 

ENGINE 651 in MODEL 117, 156, 176, 246 

Shown on model 246.242 

Fig 1: Checking Regulator And Alternator - Shown On Model 246.242
G10250190Courtesy of MERCEDES-BENZ USA
DANGER 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 Check status of battery   AR54.10-P-1129NKB
2 Open cap on diagnostic connector (X11/4)    
3 Attach diagnostic system (0100) at the diagnostic connector (X11/4)    
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-04A
4 Check alternator with diagnostic system (0100) IMPORTANT Only perform tests when engine is at its normal operating temperature.
Tests are menu-assisted:
control unit
  • actuations
  • alternator diagnosis
 
5 Disconnect diagnostic system (0100)    
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-04A
6 Close cap on diagnostic connector (X11/4)