Dacia SuperNova (engine E7J). Manual - part 21

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16 - 2

STARTING AND CHARGING

B.The light turns on when the engine is running

This indicates a charging fault, the cause of which may be:

- the carrying belt of the alternator is broken, the charging conductor is cut (+ con-

tinuous);

- a fault with the alternator (rotor, stator, diodes or brushes);
- a fault with the voltage regulator;
- a voltage surge (overvoltage).

C.  The customer / user claims a fault with the charging, as the

on-board light works correctly.

If the regulated voltage is less than 13.5 V, the alternator is checked. The cause of the

defect may be:

- a burnt diode;
- disconnected or cut live wire;
- the coal powder or the wear of the collector.

C

O NTROL

 

OF

 

VO LTAG E

A voltmeter is connected across the terminals of the battery and the voltage value is

read.

The engine is run until the needle of the voltmeter settles at the regulated voltage. This

value should be within 13.5 and 14.8 V.

The maximum of consumer devices are connected: the voltage should remain between

13.5 and 14.5 V.

C

AUTION

!

In case electric arc welding is being done on the car, the battery and the voltage

regulator will be compulsorily disconnected (the alternator).

ALTERNATOR

E7J-A-2/60 ENGINE

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STARTING AND CHARGING

DIAGNOSING

Special device: Tester CLIP - SAGEM  and accessories for physical measurements.

I

NSPECTION

 

O F

  

CH ARG ING

 

CIRCUIT

The CLIP - SAGEM tester allows the inspection of the alternator, by measuring the volt-
age and the current supplied with, and without electric consumers.

NOTE: The Ampere pincers are of the inductive type (0-1000 A). Its mounting
will be done without disconnecting the battery, thus allowing for the memorized
data and the adapting values in the injection calculator to be preserved.

Mount the ammeter clamps directly to the alternator exit, having the arrow oriented

towards this one

.

The measurements are effected in three steps:

- measuring the battery voltage without contact on;
- measuring the regulated voltage and the current supplied without consumers;
- measuring the regulated voltage and the current supplied with a maximum of consumers.

The values obtained as a result of the measurements lead to the following interpretations:

-the voltage of the ‘empty’ battery < 12.3 V: so, the battery is flat;

With no consumers:

-regulated voltage > 14.8 V: so, the regulator is faulty;
-regulated voltage (‘empty’) < 13.2 V or charging current < 2 A: so, there is a defect

of charging.

With consumers:

-regulated voltage > 14.8 V: so, the regulator is faulty;
-regulated voltage (‘empty’) < 12.7 V:the alternator charging current in regard to its

characteristics must be checked.

I

NTENSITY

 (A)

E

NGINE

E7J

Rated intensity

           75

      80

Minimal intensity, which has to be supplied by the

      alternator to all working consumers                                        51

     60

If the measured output is too little, the following will be checks:

-wear of alternator (collector brushes, etc.);
-battery connections;
-the mass braid of the engine;
-conformity of alternator;
-tension of carrying belt.

If the measured output is correct and the regulated voltage is too little, the cause may be:

-the car has too many electric consumers;
-the battery is flat.

ALTERNATOR

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STARTING AND CHARGING

SPECIAL DEVICES

  MOT 1505

BELT TENSION MEASURING DEVICE

D

ISMO UNTING

The car is set on a two-column lifting stand;
Disconnect the electric connections from the battery.
The fuel supply conduit is uncoupled;
The following are taken off:

- air filter;
- the oil-gauge tube;
- the top screw of the alternator;
- the alternator belt;
- the stretching flange of the alternator.

The car is suspended.
The electric connectors of the alternator are uncoupled;
Dismount the alternator lower attachment screw.
Lower the vehicle.
The alternator is taken out at the top.

ALTERNATOR

R

E

-M

O UNTING

The mounting operations are done in the reverse order;
The  carrying  belt  of  the  alternator  is  stretched  to get  the  recommended (263

Hz+/- 10%) mounting voltage;

E7J-A-2/60 ENGINE

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STARTING AND CHARGING

The position of the alternator is blocked.
The engine is revolved three and a half crankshaft turns;
The reading end of the MOT. 1505 measuring device is placed in the measuring area;
The tension in the belt is measured;
It is checked whether this fits into the mounting tension tolerance; if not, the belt will

be stretched again until the recommended tension (263 Hz +/- 10%) is reached.

The inspection and the adjustment of the belt are done with the engine at ambient

temperature.

Tighten at the required moment, the alternator attachment screws :

- screw M10(lower attachment)-5 daNm
- screwM10 (upper attachment)-2.2 daNm.

Remark: Once dismounted, a belt is not to be remounted, but replaced.

MOT. 1505

MOT. 1505

ALTERNATOR