Test alternator charging current - AR15.40-P-5011EL
WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2016 Mercedes-Benz E63 S AMG, 2016 Mercedes-Benz E400, 2016 Mercedes-Benz E350, 2016 Mercedes-Benz E300, and 2016 Mercedes-Benz E250. However, it is still accessible from the selected car via links, so may be relevant.
ENGINES 157, 276, 278 in MODEL 212, 218
Connection scheme
| Checking | |||
| Risk of injury caused by fingers being pinched or crushed when removing, installing or aligning hoods, doors, trunk lids, liftgates or sliding roof | Keep body parts and limbs well clear of moving parts. | AS00.00-Z-0011-01A | |
| Risk of death caused by vehicle slipping or toppling off of the lifting platform. | Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer. | AS00.00-Z-0010-01A | |
| 1 | Check tension of poly-V belt | ||
| 2 | Check poly-V belt for wear | AP13.22-P-1352EW | |
| 3 | Check electrical lines to on-board electrical system battery (G1), alternator (G2), starter (M1) and on the ground point for the battery at the front right (W10) in the engine compartment for tight seating and check for a perfect condition | ||
| 4 | Remove lower engine compartment paneling | AR61.20-P-1105EW | |
| 5 | Check ground strap between engine and body for tight seating and proper condition | ||
| 6 | Connect volt ampere tester (079) with current clamp (065) according to connection diagram | ||
| Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running | Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. |
AS00.00-Z-0005-01A | |
| 7 | Start engine | ||
| 8 | Test charge current at high engine revs; apply load to on-board electrical system battery (G1) for this step using volt-ampere tester (079) | ||
| Check values for the ALT (G2) Charge rate below specified value: ↓ |
*BE15.40-P-1001-01L | ||
| Test alternator diodes (G2). If diodes are faulty: ↓ Replace alternator (G2): |
AR15.40-P-9301-02EW | ||
| Engine 276 | AR15.40-P-5032EL | ||
| Engine 157, 278 | AR15.40-P-5032ELB | ||
| 9 | Turn off engine | ||
| 10 | Disconnect volt ampere tester (079) with current clamp (065) |
CHECK VALUES FOR ALTERNATOR
| Number | Designation | ENGINE 157 IN MODEL 166, 212, 218, 231, 463 | ENGINE 276 IN MODEL 166, 172, 204, 207, 212, 218 | ENGINE 278 IN MODELS 166, 207, 212, 218 | ||
|---|---|---|---|---|---|---|
| BE15.40-P-1001-01L | Charge current for alternator | max. | A | 180 | 180 | 180 |
| min. | A | 115 | 140 | 140 | ||
| Engine speed | rpm | 2000 | 2000 | 2000 | ||
| Ratio | i= | 2.93 | 2.93 | 2.93 | ||