2008 RENAULT SCENIC light

16A-4V1 MR-372-J84-16A000$030.mif
16A
Scénic II ph 2
The function of the charging circuit is to:
•Ensure that electrical energy is supplied to the vehicle whilst respecting the dynamic performance constraints of
the engine and transmission assembly: the alternator resisting torques and the torque gradients measured must
be managed.
•To control alternator loading and load shedding during engine management authorisation or variation of the
electrical load.
•To ensure the quality of the on board network voltage in terms of the voltage level and variation (voltage gradient
management).
•To optimise the battery charge by applying a voltage to its terminals correlating to its initial charge status (in sleep
mode) and to its internal temperature.
•To inform the engine management about the mechanical power taken from the accessories pulley, the alternator
charge rate and the rotor excitation current value.
•To run fault finding on the charging circuit: "Battery" warning light display.
The function of the starting circuit is to:
•start the vehicle when there is a starting request from the ignition key.
STARTING - CHARGING
Fault finding – Features

16A-14V1 MR-372-J84-16A000$050.mif
STARTING - CHARGING
Fault finding – Fault finding charts16A
Scénic II ph 2
ALP 4The starter rotates slowly from the outset.
The rotation speed of the starter decreases rapidly.
The starter causes the warning lights on the instrument panel to
become very dim.
NOTESTest the wiring (TEST3 Wiring check).
Test the condition of the battery (see 80A, Battery, Test 1 Battery check).
If the fault is still present, replace the starter (see MR 370, Mechanical, 16A, Starting - Charging, Starter:
Removal - Refitting).

16A-17V1 MR-372-J84-16A000$060.mif
STARTING - CHARGING
Fault finding – Tests16A
Scénic II ph 2
TEST 1
CONTINUED
Keep the engine speed at 3000 rpm with all
consumers switched on.
Main beam headlights, de-icing, passenger
compartment ventilation.
Value of measured current? (i 2)
Compare i 1 and i 2
i 2 > i 1 + 5A i 2 < i 1 + 5A
The alternator flow rate is correctReplace the alternator (see MR 370,
Mechanical, 16A, Starting -
Charging, Alternator: Removal -
Refitting).
Stop the engine
Value of the electrical current?
> 1 A < 1 A
Replace the alternator (see
MR 370, Mechanical, 16A,
Starting - Charging,
Alternator: Removal -
Refitting).Alternator is correct.
A

16A-21V1 MR-372-J84-16A000$060.mif
STARTING - CHARGING
Fault finding – Tests16A
Scénic II ph 2
TEST 3
CONTINUED
With the engine running and the main beam
headlights and heated rear screen on, measure
the voltage between the battery B+, component
code 107, and the alternator B+, component
code 103.
Is the voltage > 0.7 V?Check that all the wires connecting the battery,
the alternator and the starter are secure and in
good condition, and that all their terminals are
correctly tightened and secure.
Repair the damaged wires and terminals. If the
connection is faulty and there is a repair
procedure (see Technical Note 6015A,
Electrical wiring repair, Wiring: Precautions
for repair), repair the wiring, otherwise replace it
With the engine running and the main beam
headlights and heated rear screen on, measure
the voltage between the negative terminal of the
battery, component code 107, and the alternator
frame, component code 103.
Is the voltage > 0.7 V?Check the earths of the engine, alternator,
chassis, gearbox, battery or starter (tightness,
condition of terminals, condition of wires).
Repair the damaged wires and terminals. If the
connection is faulty and there is a repair
procedure (see Technical Note 6015A,
Electrical wiring repair, Wiring: Precautions
for repair), repair the wiring, otherwise replace it
The electrical circuit is in good order.
A
NO
YES
NO
YES
NO