ar1540p5000v

Checking the regulator and alternator

Type ar · topic 15.40 · version 0101 · 2012-02-22

Applies to: ENGINES 271, 272 in MODEL 171

Where it sits

Function group 1 Engine › 15 Electrical system - engine › 15.40 Generator — Series 171

EinPAS 25 On-board/network/multifunction › 25.20 On-board electrical system › 25.20.30 Alternator — Series 171

Also applies to engines/gearboxes: 271 ***, 272 ***

AR15.40-P-5000V

Checking the regulator and alternator

14.2.12

ENGINES 271, 272 in MODEL 171

Checking the regulator and alternator

P15.40-2339-05

0100 STAR DIAGNOSIS

X11/4 Data link connector

Check

Danger!

Risk of explosion caused by escaping oxyhydrogen gas. Risk of injury caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte (contains diluted sulfuric acid) or metal spatter due to short circuit. Risk of burn injuries caused by short circuit. Risk of poisoning caused by swallowing battery electrolyte (contains diluted sulfuric acid) or absorption of lead over the skin or orifices

No fire, sparks, open flames or smoking.

Wear acid-resistant gloves and clothing and safety glasses with side guards.

Do not place any conductive objects on the battery and avoid any short circuit from battery positive to ground.

Only fill liquid battery electrolyte (diluted sulfuric acid) into suitable and appropriately marked containers.

AS54.10-Z-0001-01A

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Notes on battery

AH54.10-P-0001-01A

1

Check condition of the battery

Assess the results, replace battery if required.

AR54.10-P-1129V

2

Connect up STAR DIAGNOSIS (0100) to data link connector (X11/4).

Connect up STAR DIAGNOSIS and read out fault memory

AD00.00-P-2000-04A

STAR DIAGNOSIS diagnosis system

*WH58.30-Z-1048-13A

Danger!

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 running engine

Secure vehicle to prevent it from moving by itself.
Wear closed and snug-fitting work clothes.
Do not grasp hot or rotating parts.

AS00.00-Z-0005-01A

3

Check alternator using STAR DIAGNOSIS (0100)

Only perform tests when engine at its normal operating temperature.

The checking procedure is menu-assisted:
- engine control unit

- actuations

- alternator diagnosis

STAR DIAGNOSIS diagnosis system

*WH58.30-Z-1048-13A

4

Disconnect STAR DIAGNOSIS (0100).

STAR DIAGNOSIS diagnosis system

*WH58.30-Z-1048-13A

Commercially available tools

Number

Designation

WH58.30-Z-1048-13A

STAR DIAGNOSIS diagnosis system, Compact Passenger Car

6511 1801 00

Referenced documents